Current issue

• 2017 Vol.33 No.1 Published:04 February 2017

  Effects of Different Ratios of Base-tiller-ear Fertilizer on Nitrogen Absorption and Utilization of Rice 2017, 33 (1):  1-5.  DOI: 10.11924/j.issn.1000-6850.casb15080089 Abstract + ( 970 )   PDF ( 434KB )   ( 626 ) In order to rationally apply nitrogen fertilizer and provide theoretical basis for efficient utilization of nitrogen fertilizer, the optimum ratio of base-tiller-ear fertilizer of rice was studied. The study designed 5 ratios of base-tiller-ear fertilizer with the same total nitrogen amount and analyzed the nitrogen absorption and utilization of rice. The results showed that the nitrogen harvest index showed a downward trend with the increase of ear fertilizer. Nitrogen translocation amount, nitrogen translocation efficiency, nitrogen translocation contribution rate of rice leaves and stems, nitrogen physiological efficiency, nitrogen efficiency, nitrogen uptake efficiency, nitrogen use efficiency, nitrogen behavior use efficiency, nitrogen agronomic use efficiency, nitrogen physiological use efficiency, nitrogen partial productivity and soil nitrogen dependency rate of rice increased firstly and then decreased, and reached the maximum at 6:4. Grain yield showed a significantly positive correlation with the nitrogen translocation contribution rate, the nitrogen efficiency and the nitrogen agronomic use efficiency, and showed a positive correlation with the nitrogen translocation efficiency and the nitrogen physiological use efficiency; the spike number showed a significantly positive correlation with the nitrogen harvest index. Glumous flower number of per spike showed a positive correlation with the nitrogen translocation efficiency, and showed a negative correlation with the nitrogen partial productivity. Thousand seed weight showed a negative correlation with the nitrogen physiological use efficiency and showed a significant positive correlation with the nitrogen partial productivity. Therefore, the optimum ratio of base-tiller fertilizer was 6:4, which could achieve the purpose of optimizing the group and obtaining high yield.

  Effects of Planting Densities and Fertilization on Dioscorea deltoidea Yield 2017, 33 (1):  6-10.  DOI: 10.11924/j.issn.1000-6850.casb16020083 Abstract + ( 653 )   PDF ( 476KB )   ( 437 ) The paper studied the effects of planting densities and fertilization level on the yield of Dioscorea deltoidea, in order to provide references for high efficiency cultivation. The orthogonal experiment was designed with five controllable factors, the planting density, organic manure, nitrogen fertilizer, phosphate fertilizer and potash fertilizer, and four levels, 16 experimental treatments and 3 repeats were conducted and the area was 12 m2. The results showed that the yields of the 16 experimental treatments were 6241.67- 26416.67 kg/hm2. The test F value of the four factors, planting density, potash fertilizer amount, organic manure amount and nitrogen fertilizer amount reached extremely significant level, F value of phosphate fertilizer amount reached significant level. The different treatments had significant effect on the yields of D.deltoidea. The best experiment combination was the planting density of 150000 plants/hm2, with the application rate of base fertilizer, nitrogen fertilizer, phosphorus fertilizer and potash fertilizer as 45000 375, 750 and 480 kg/hm2, respectively. Reasonable planting density and fertilization ratio could effectively improve the yield of D. deltoidea. Planting density, and the amount of potash fertilizer, base fertilizer and nitrogen fertilizer were the key factors to affect the yields of D. deltoidea.

  Effects of Irrigation Stage on Yield and Anthocyanidin Content of Purple Potato in hilly area of central Sichuan Basin 王 平,,,, and 2017, 33 (1):  11-17.  DOI: 10.11924/j.issn.1000-6850.casb16090051 Abstract + ( 855 )   PDF ( 671KB )   ( 385 ) To study the effects of irrigation stage on yield and anthocyanidin content of purple potato in hilly area of central Sichuan basin under the condition of once irrigation, purple potato variety‘Rongziyu 5’was used as test material and five irrigation stage treatments such as non-irrigation, seedling stage irrigation, bud stage irrigation, flowering stage irrigation and harvest stage irrigation were set in this experiment. The results showed that: compare with non-irrigation treatment, irrigation treatment increased the leaf area index (LAI), dry matter accumulation amount, tuber dry weight and fresh tuber yield. Among them, the yield of bud stage irrigation treatment was 22.68% to 37.50% higher than that of control while the yield of flower stage irrigation treatment was 26.82% to 38.79% higher than that of control. In the tuber classification of flower stage irrigation treatment, the percentage of less than 30 g was lower while the percentage of more than 75 g was higher. The anthocyanidin content of potato tuber showed a tendency of decrease first and then increase with the development of crop growth. The anthocyanidin content of seedling stage irrigation treatment was the highest in different years. Therefore, under the condition of once irrigation, bud stage irrigation or flowering stage irrigation could obtain higher fresh tuber yield while seedling stage irrigation could obtain higher tuber anthocyanidin content.

  Evaluation of Peanut Yield Potential in Anhui Using Rank Analysis 2017, 33 (1):  18-23.  DOI: 10.11924/j.issn.1000-6850.casb16100013 Abstract + ( 567 )   PDF ( 607KB )   ( 384 ) To screen suitable peanut varieties in Anhui Province, the rank analysis was employed to evaluate the yield potential of 22 peanut varieties in nine circumstance pots in six years. Three parameters were estimated for the data. The three parameters were rank numerals (H2), circumstance power index (YM) and rank variance (S2). Based on these, the comparison of yield and stability of each variety was conducted. The results showed that four varieties had the best yield performance and stability in 22 peanut varieties. The rank analysis method was efficient and precise, it could be a valuable tool in evaluating crop variety.

  Application of Soil Testing and Formulated Fertilization System TRPF on Soybean Optimized Fertilization in Sanjiang Plain 2017, 33 (1):  24-28.  DOI: 10.11924/j.issn.1000-6850.casb16030061 Abstract + ( 630 )   PDF ( 755KB )   ( 439 ) In order to test and verify application effect of fertilization on soybean by TRPF system of soil testing and fertilizer recommendation in sanjiang plain,and to test soft system, setting up different fertilization treatments in different fields between 2013 and 2014. By testing and analyzing on yield, outup value, fertilizer input amounts , economic benefits and so on, the result showed that the fertilizer input amounts of fertilization treatment on hight fertilization amount(HF) had been maximum at jiamusi experiment plot,and they were 1380 yuan per hectare in 2013,and 1374 yuan per hectare in 2014.The profits of TRPF treatment were largest in those two years. The increase income of TRPF treatment was 706.9 yuan per hectare comparing with the conventional fertilization in 2013, and 1254.1 yuan per hectare in 2014. The outup value of HF was the second,but the economic profit was lower comparing with these three treatment of TRPF. At the 853 farm experiment plot, the fertilizer input amounts of experience fertilization had been maximum ,and they were 780 yuan per hectare in 2013,and 765 yuan per hectare in 2014.The profits of TRPF treatment were largest in those two years.The increase income of TRPF treatment was 2102.2 yuan per hectare comparing with the conventional fertilization in 2013, and 1567.3 yuan per hectare in 2014. The increase income of TRPF treatment was 1184.2 yuan per hectare comparing with the experience fertilization in 2013, and 1266.1 yuan per hectare in 2014.This research had proved the good effect on TRPF system by analysing increaserate,fertilizer input amounts and economic profit.The income aspect of formula on TRPF are better than HF,LF,TR, EF and CK.

  Effect of Salicylic Acid on High Quality Seedling Forming and Physiological Index of Pinus wangii 杨文忠 2017, 33 (1):  29-32.  DOI: 10.11924/j.issn.1000-6850.casb15060063 Abstract + ( 625 )   PDF ( 576KB )   ( 339 ) In order to solve the problems that Pinus wangii seedlings have poor growth, poorly developed roots, and very higher mortality rate, seedlings planted in nutritional bags were used to study the effects of salicylic acid (SA) on its high quality seedling forming and physiological indexes. In our study, six different concentrations of SA solutions (0, 0.25, 0.5, 1.0, 1.5, 2.0 g/L) were sprayed on P. wangii seedlings to screen the best concentration of SA solution in favor of P. wangii. The results showed that SA solution could significantly improve the growth of P. wangii seedlings through increasing the root volume and stimulating the root activities, and enhancing stress resistance. Therefore, SA solution could facilitate the formation of high quality P. wangii seedlings. Furthermore, seedlings demonstrated the highest quality and the strongest stress resistance when SA concentration is 1 g/L, which was 295.18% higher than that of the control. In conclusion, it is suggested that P. wangii seedlings should be treated with SA at the optimum concentration of 1 g/L,.n order to solve the problems that Pinus wangii seedlings have poor growth, poorly developed roots, and very higher mortality rate, seedlings planted in nutritional bags were used to study the effects of salicylic acid (SA) on its high quality seedling forming and physiological indexes. In our study, six different concentrations of SA solutions (0, 0.25, 0.5, 1.0, 1.5, 2.0 g/L) were sprayed on P. wangii seedlings to screen the best concentration of SA solution in favor of P. wangii. The results showed that SA solution could significantly improve the growth of P. wangii seedlings through increasing the root volume and stimulating the root activities, and enhancing stress resistance. Therefore, SA solution could facilitate the formation of high quality P. wangii seedlings. Furthermore, seedlings demonstrated the highest quality and the strongest stress resistance when SA concentration is 1 g/L, which was 295.18% higher than that of the control. In conclusion, it is suggested that P. wangii seedlings should be treated with SA at the optimum concentration of 1 g/L,.

  Identification and Antagonistic Studies on a Pathogenic Fungus Causing Apple Valsa Canker 2017, 33 (1):  33-37.  DOI: 10.11924/j.issn.1000-6850.casb16040061 Abstract + ( 903 )   PDF ( 784KB )   ( 458 ) Apple valsa canker is one of the most serious pathogenic fungi in north China which often leads to widespread death among apple trees. To control the fungal disease with biocontrol methods, tissues of apple trees infected by valsa canker were collected from farms located in Yu county, Yangquan city, Shanxi Province. A pure cultural fungal strain numbered as SX1408 was obtained using the tissue isolation method. A partial ITS sequence (GenBank Accession No. KR007599) was amplified using fungal universal primers ITS1 and TIS4. After online Blast analysis and MEGA5.0 cluster analysis, the strain SX1408 was identified as Valsa mali Miyabe et Yamada. Antagonistic study toward the strain SX1408 was conducted using the plate confrontation method. Among the 19 tested Streptomyces species kept in our lab, four of them manifested antagonistic activity towards the disease. Strain BUAS13-03 showed the highest antifungal activity with a diameter of inhibition zone of 2.80 cm and an inhibition ratio of 78%. The study provides certain references for biological control of apple valsa canker disease.

  Effects of Potassium Humate on Quality of flue-cured leaves of Tobacco variety “Honghuadajinyuan” 2017, 33 (1):  38-42.  DOI: 10.11924/j.issn.1000-6850.casb16040060 Abstract + ( 649 )   PDF ( 545KB )   ( 573 ) For improving the flue-cured characteristic and usability of tobacco variety ‘Honghuadajinyuan’, and clarifying the effect of foliar application of potassium humate (HA-K) on the yield and quality of ‘Honghuadajinyuan’. A random block design was used in this research, HA-K was applied once in each resettling stage, fast-growing stage and budding stage; agronomic traits were evaluated in mature stage, and yield and output value were calculated after flue-cured. Results showed that: there were no significant differences between fertilizer-treated ‘Honghuadajinyuan’ and CK in yield-related leave characters; However, compared with control, the yield, output value, proportion of superior leaves, and proportion of middle and superior leaves were significantly increased by 7.25%, 9.22%, 6.23% and 8.49%, respectively; chemical components were more harmonious than that of CK, content of reducing sugar, total sugar, and chlorine were significantly decreased by 10.09%, 17.54% and 53.85%, respectively, meanwhile, total nitrogen and potassium were significantly increased by 13.58% and 21.09%, there were no significant differences in total alkaloids; the fertilizer-treated ‘Honghuadajinyuan’ maintained smoking quality of regular ‘Honghuadajinyuan’, and no significant differences in smoking score with control. In conclusion, the HA-K, as an environmental-friendly organic fertilizer, was available for improving yield and quality of flue-cured leaves in ‘Honghuadajinyuan’ production.

  Effect of New Active Calcium Fertilizer on Apple Quality and Yield 胡雪芳,,, and 2017, 33 (1):  43-46.  DOI: 10.11924/j.issn.1000-6850.casb15110109 Abstract + ( 628 )   PDF ( 430KB )   ( 421 ) The effect of Chitosan oligosaccharide acid calcium, a new biological calcium fertilizer on apple growth, quality and yield was studied. Commercial humic acid calcium and sugar alcohol calciumwere used as the control fertilizers. The results show that the test Chitosan oligosaccharide acid calcium liquid spraying fertilizer has obvious advantages on apple tree growth. The length of spring shoots, leaf thickness, number of flower bud differentiation on single branch, and 75mm apple weight show an increase relative to controls. The acre yield increase 5676 kg than control groups, and the increase rate is 14.31 %. Variance analysis shows the difference between treatments was highly significant (F value = 184.511). The differences were further multiple compared using LSD method, suggesting that the yield-increasing effect on Fuji Apple of Chitosan oligosaccharide acid calcium is significant.

  Effects of Phosphorus Fertilizer Reduction on Tomato Plant Growth, Yield, Quality and Soil Nutrient 2017, 33 (1):  47-51.  DOI: 10.11924/j.issn.1000-6850.casb16060008 Abstract + ( 703 )   PDF ( 582KB )   ( 555 ) This study aims to test the effects of phosphorus fertilizer reduction on tomato cultivation. A field experiment was conducted to evaluate the effects of phosphorus fertilizer reduction on tomato plant growth, yield, quality and soil nutrient. There were three treatments, respectively, conventional phosphorus fertilization (CK), 50% reduction of phosphorus fertilizer (P-1) and 70% reduction of phosphorus fertilizer. Reduction of phosphorus fertilizer had little effect on plant height, stem diameter, leaf number and plant height/stem diameter ratio and yield of tomato. The single fruit weight, yield per plant and yield per unit area of tomato was 173-181 g, 1.81-2.05 kg and 51.9-56.9 t/hm2 in all treatments. Compared with CK, P-2 treatment increased the number of root ＞ 2 mm and the root cap ratio by 72.6% and 28.0% , respectively. Both phosphorus reduction treatments significantly improved tomato reducing sugar content and sugar acid ratio as compared with that of CK. The tomato sugar acid ratio in P- 2 treatment was significantly higher than that in P- 1 treatment. The phosphorus reduction treatments both significantly reduced topsoil available phosphorus as compared with that in CK. Reduction of phosphorus fertilizer did not affect tomato yield, while increased tomato quality and improved soil environment.

  Germplasm Resources of Vitis davidii: Research Advances 2017, 33 (1):  52-56.  DOI: 10.11924/j.issn.1000-6850.casb16090118 Abstract + ( 637 )   PDF ( 494KB )   ( 412 ) This paper reviewed the research progresses on Vitis davidii, including tissues and organs, processing and utilization, stress and disease resistance, active extract and genetic diversity. Based on relative studies on morphological diversity, propagation and breeding, and genetic relationship discussion, the authors pointed out that some research aspects needed to be improved, including rooting mechanism, resistance formation mechanism, active substance metabolic process, genetic background discussion and specific gene discovery and utilization and so on. The result would provide reference for further study on V. davidii germplasm resources.

  Effects of Sulphur Application, Water-controlled Irrigation and Fertilization Application on Blueberry Growth Based on Orthogonal Design 张 悦,张会慧,周 琳 and 魏殿文 2017, 33 (1):  57-63.  DOI: 10.11924/j.issn.1000-6850.casb15060117 Abstract + ( 605 )   PDF ( 494KB )   ( 398 ) To optimize blueberry cultivation mode in cold area, effects of three factors (sulphur application, water- controlled irrigation and fertilization application) on blueberry plant growth in the Greater Khingan Mountains were studied with orthogonal experiment. The results showed that the orthogonal treatments of three factors affected the growth index of blueberry significantly. The obvious variation ranges of growth index appeared in different treatments. There were apparent interactions among the three factors, and little antagonistic effect. The range analysis results showed that the biggest factor for plant height, crown width and length of blueberry shoots was the relative soil moisture content. And the biggest factor for the branch diameter was fertilization. These three factors showed that the optimal growth traits of blueberry were in level 3 or level 4 of each factor. Combined with the change of the growth parameters, it was suggested that the best growth condition of blueberry‘blomidon’in the Greater Khingan Mountains was: sulfur content of 70-80 g/m2, potassium sulphate compound fertilizer of 7.5-10 g/plant, and relative water content of soil maintained at 45%-60%.

  Salt Tolerance and Physiological-biochemical Characteristics of Different Fig Cultivars 尤 超 2017, 33 (1):  64-71.  DOI: 10.11924/j.issn.1000-6850.casb16070033 Abstract + ( 791 )   PDF ( 920KB )   ( 509 ) To analyze salt tolerance level of different fig cultivars, and provide foundation for salt tolerant cultivar breeding, the cutting seedlings of‘Bulanruike’were used as materials for studying the changing tendency of physiological indexes under different salt stress levels. The results showed that the indexes of fig seedlings had no significant change under the stress of 0.2% NaCl, and certain changes were observed under 0.4% NaCl in the middle and late period, and under 0.6% NaCl, the indexes had significant differences from those of the initial period, indicating that 0.6% NaCl was the limit of salt tolerance of fig. Based on this, we analyzed the physiological indexes’change of the cutting seedlings of 5 introduced fig cultivars in Suqian, namely‘Bulanruike’,‘Bojihong’,‘Lvkang 1’,‘Jinaofen’,‘Meiliya’, under 0.6% NaCl. The results showed that the performance also varied considerably among different fig cultivars under salt stress, the sequence of the salt tolerance was‘Jinaofen’＞‘Meiliya’in yellow fleshed cultivars; the sequence of the salt tolerance of red fleshed cultivars were‘Bulanruike’＞‘Bojihong’,‘Lvkan

  Research Progress of Flowering Regulation of Dendrobium 2017, 33 (1):  72-77.  DOI: 10.11924/j.issn.1000-6850.casb16070130 Abstract + ( 606 )   PDF ( 527KB )   ( 770 ) Research on flowering regulation of Dendrobium is important to its cultivation, production and industrial development. The paper briefly described the biological classification and ornamental value of Dendrobium, reviewed the research progress and the application status quo of flowering regulation techniques of Dendrobium focusing on lighting, temperature, plant growth regulators and nutrition, pointed out the problems and discussed the prospect of the techniques and proposed several directions of research value, in order to provide reference for further study on flowering regulation of Dendrobium, solve the problem of market demand dislocation, achieve on-demand for flowers and promote benign development of the industry.

  Subalpine Wild Ornamental Plants in Saihanba: Introduction and Cultivation 2017, 33 (1):  78-81.  DOI: 10.11924/j.issn.1000-6850.casb16060020 Abstract + ( 548 )   PDF ( 520KB )   ( 526 ) In order to find wild ornamental plants which are suitable for Chengde, the introduction and cultivation test was carried on with the subalpine wild plants of Saihanba. 13 species of wild ornamental plants, which are being to 13 genus, 6 families, were collected from Saihanba. Then the test was carryied on after treated according to the classification of plants. The results showed that: there were certain differences among their adaptability. 2 plants, died ,which were Paeonia obovata Maxim. and Stellera chamaejasma L.;although Pyrola calliantha H. Andr. can survived, it could not go very well, finally it disappeared; 5 plants, including Caltha palustris var. Sibirica Regel, Polygonatum odoratum (Mill.) Druce and so on, there was a short period of time to sleep in summer, and in the second year they can grow and flower normally; 4 plants including Allium victorialis, Maianthemum bifolium (L.) Fr.Schmidt, Matteuccia struthiopteris (L.) Todaro, Hippochaete hiemale (L.) Boerner had good adaptability. 11 kinds of plants can be used as the introduction of plants in Chengde.

  Meteorological Conditions for Persistent Fog and Haze Process in Guanzhong Area, Shaanxi 姚静 and 杜川利 2017, 33 (1):  82-88.  DOI: 10.11924/j.issn.1000-6850.casb15120092 Abstract + ( 790 )   PDF ( 1162KB )   ( 634 ) In order to effectively reduce disaster losses caused by fog and haze, and provide a reliable basis for haze weather forecast, a durative regional fog and haze weather occurred in Shaanxi Province in December 17th -25th, 2013, was analyzed by using MICAPS data, automatic weather station data and laser radar data. The results showed that: the persistent fog and haze process had obvious phase characteristics. The configurations of high and lower level were conducive for the quick accumulation of fog and haze in the early stage. In the late stage, the 500 hPa circulation at mid-latitude was straight, and there was a weak warm advection at 925 hPa, which were favorable for the persistent fog and haze process. Persistent fog or haze process had low requirement for thicker wet layer, and the thickness of wet layer under 900 hPa and the relative humidity from 60% to 80% were advantageous to the lasting of fog and haze weather. Weak surface wind, the maintaining of temperature inversion, and the pollutants concentration in the surface below 200 m were the main weather features of this serious fog and haze process. The vertical distribution of vorticity advection and total temperature advection provided favorable dynamic and thermodynamic structure for the generation and maintaining of fog and haze, the special terrain of Guanzhong Area was another important reason.

  Soil Respiration and Carbon Balance Under Different Nitrogen Application Levels in Maize Field 2017, 33 (1):  89-95.  DOI: 10.11924/j.issn.1000-6850.casb16060060 Abstract + ( 697 )   PDF ( 682KB )   ( 451 ) Application of nitrogen fertilization is a key factor which affects the agricultural carbon balance, quantitative assessment of soil respiration and carbon balance under different nitrogen fertilizer levels are important to the protection of the ecological environment on soil fertility and regulation of carbon emissions. In this study, field tube experiment and field experiment were conducted to explore the dynamic changes of soil respiration rate and the carbon balance of agricultural ecosystem under different nitrogen levels. The results showed that, maize biomass (shoot and root) fixed the amount of organic carbon of 5660.71～8106.00 kg C/hm2. The total amount of soil respiration(carbon release) was 9209.04 ~ 16510.40 kg C/hm2. On bare land, the total amount of microbial respiration(carbon release) was from 2827.36 kg C/hm2 to 6951.68 kg C/hm2. Root respiration contributed 57.9% ~ 69.3% to the total amount of soil respiration. Under maize-plant condition, carbon balance of different growth stages changed significantly during different growth stages. In the jointing stage, net ecosystem productivity (NEP) were negative under all treatments，which indicated soil was the source of atmospheric CO2. In the tasseling stage and the mature stage, NEP were positive and the soil presented as the sink of atmospheric CO2. The trend of NEP were different with the increase of nitrogen fertilizer application in the three growth stages: nitrogen fertilizer application significantly decreased NEP in the jointing stage, however, in the tasseling stage and the mature stage, NEP in the treatment of the nitrogen fertilizer application was higher than that without N application.

  Effect of Biochar on Tobacco-planting Soil Improvement and Tobacco Quality in Mudanjiang 任天宝,张志浩,元野,王博,匡岗,刘德玉 and 刘国顺 2017, 33 (1):  96-101.  DOI: 10.11924/j.issn.1000-6850.casb16100083 Abstract + ( 743 )   PDF ( 572KB )   ( 605 ) To study the feasibility of biomass carbon to the tobacco soil and tobacco improvement. The black soil were used for experiment from Ning An country of Mutankiang. Biomass carbon was studied in C/N of soil, soil microbial growth , development of tobacco , the conventional chemical composition and the influence of neutral aroma components. The results showed that 1800kg/hm2 biomass carbon could make the C/N of soil increase by 31.79%. The number of actinomycetes in the soil was 3.8 times as much as the control group. The growth advantage was obvious after applying the biomass carbon, plant height, leaf number were significantly higher than control group. but total sugar and nicotine was not significant. 1200 kg/hm2 biomass carbon made the potassium content in after baking tobacco increase by 11%. 2400 kg/hm2 improved total sugar content after baking tobacco by 5.40%. 1800 kg/hm2 biomass carbon made the tobacco Solanone content was 1.97 times as much as control group. Comprehensive studies have shown that tobacco soil in 1200-1800 kg/hm2 biomass carbon could improve the soil environment, promote the growth of tobacco and improved the quality of tobacco.

  Application of Ficus tikoua Bureau in Vegetation Restoration and Phytoremediation Process of Mining Area 2017, 33 (1):  102-105.  DOI: 10.11924/j.issn.1000-6850.casb16090134 Abstract + ( 574 )   PDF ( 849KB )   ( 407 ) The paper aims to study the possibility of using Ficus tikoua Bureau as a pioneer plant in the vegetation restoration process of mining area, especially to tailings. This study was carried out with a simulation of the mining area and a tailing for the process of vegetation restoration. And the heavy metals in the aboveground part of Ficus tikoua Bureau and perennial ryegrass under the same culture condition were also determined. Results showed that: it was effective to use Ficus tikoua Bureau in the process of vegetation restoration and phytoremediation. And results also showed that Ficus tikoua Bureau was better than perennial ryegrass in the uptake of cadmium, arsenic, lead, zinc, especially for the absorption of cadmium. The research provided certain theoretical references for using Ficus tikoua Bureau was the process of vegetation restoration and phytoremediation process of mining area.

  Ecosystem Health Assessment of Typical Scenic Urban Area ——A Case of Yangshuo County, Guangxi 2017, 33 (1):  106-110.  DOI: 10.11924/j.issn.1000-6850.casb16100092 Abstract + ( 549 )   PDF ( 934KB )   ( 371 ) According to the pressure - state - response to the conceptual model, based on land use spatial pattern of Yangshuo County, established ecological health of the evaluation index system. Remote sensing data and interpretation of land use based on data from1991 to 2009, based on the pixel scale, using RS and GIS technology, extracted Yangshuo three land use spatial pattern and indicators. With the evaluation of model calculation and production of space maps of ecosystem health in the study area, then evaluated the spatial and temporal dynamic of ecosystem health in the study area. The results show that: (1)The overall ecosystem health of Yangshuo County is not good, but gradually change to be a better state of ecosystem health; (2) Ecosystem health status (health and very health) area is located in northeast and southwest of Yangshuo; Ecosystem health of the general state (sub-healthy and unhealthy) area is located in the middle of Yangshuo; (3) Land use spatial pattern changed in Putao, Baisha, Yangshuo township health was the main reason of the general ecosystem state.

  Rainstorm Under Typhoon Background: Comparative Analysis of Environment Field in Chongqing 2017, 33 (1):  111-119.  DOI: 10.11924/j.issn.1000-6850.casb16060109 Abstract + ( 770 )   PDF ( 1064KB )   ( 629 ) To find out the relationship between long distance typhoon and rainstorm in Chongqing, the authors analyzed 57 typhoon rainstorm cases in Chongqing under the typhoon background using statistical analysis respectively from the monthly and interannual variations. The authors pointed out that the typhoon path which was closely related with rainstorm in Chongqing was west path and north path. The result showed that: the typhoon rainstorms in Chongqing first appeared in mid-April, and the latest was in early October, most of the typhoon rainstorms were in June to August, the number of long distance typhoon rainstorms appeared most in July. Through synthetic analysis, the authors found out that the circumfluent background between regional typhoon rainstorm and typhoon rainstorm which had not reached regional rainstorm had significant differences; there were 4 flow patterns: east high west low, west wind inverted trough saddle shaped flow pattern, midlatitude low pressure flow and straight west wind by contrastive analysis on synthetic typhoon flow.

  CLDAS: the Application in Climate Suitability Index of Regionalization model 2017, 33 (1):  120-127.  DOI: 10.11924/j.issn.1000-6850.casb16100043 Abstract + ( 586 )   PDF ( 3789KB )   ( 468 ) The study aims to avoid site interpolation error and achieve convenient and efficient application of CLDAS data with high precision and spatial distribution to the climate suitability index of regionalization. Based on dynamic suitability calculation method of Inner Mongolia corn, GIS’Model Builder was used to construct automated calculation model of daily temperature suitability of corn, which had the functions of extracting CLDAS hours data, calculating daily average temperature, calculating the optimal temperature, lower limit temperature and maximum temperature, constructing piecewise function and error analysis. CLDAS data on May 25, 2016 was used to analyze the operation efficiency of daily space temperature suitability calculation model. The results showed that: the mean absolute error of average temperature of CLDAS and site observation value was 0.57℃; the mean absolute error of temperature suitability index of CLDAS and site observed suitability was 0.02 and the average relative error was 3.17%, which indicated high fitting precision; daily temperature suitability index calculation model had achieved suitability index of routing computation with simple operation and convenient popularization, which had high practicability and fulfilled the application of CLDAS in climate suitability index of regionalization.

  Prediction and Analysis of Future Climate Change in Anhui: Under the Background of New Generation Greenhouse Gas Emission Wang Yu,Lu Yanyu and Wang Yuehua 2017, 33 (1):  128-136.  DOI: 10.11924/j.issn.1000-6850.casb16050117 Abstract + ( 638 )   PDF ( 1835KB )   ( 418 ) Based on the new generation of scenarios which were provided by the fifth assessment report of the Intergovernmental Panel on Climate Change (IPCC), the future climate in Anhui under different scenarios was projected by using the outputs of the regional climate model RegCM4, which was derived from the “data set of climate change prediction in China V3.0” released by Chinese Meteorological Bureau. Based on the data set (1971-2000), the authors adopted the regional climate model simulation to evaluate the climate changes in Anhui in the future, especially during the next 20 years. The simulation results showed that in the next 20 years the average temperature in Anhui under different scenarios were rising, the average temperature increased by about 0.9-1.1℃; different characteristics of precipitation were predicted, the precipitation would increase under the low emission scenarios, and decrease under high emission scenarios; until the middle of the 21st century, compared with the base period, the province’s average temperature would rise 1.6-1.7℃; the increase rate of temperature in the north was higher than that in the south; the precipitation would fall 50- 90 mm, compared with the base period, the decrease of precipitation would be in the whole province. In addition, through the simulation of precipitation and temperature, we can predict that the extreme weather and climate events, such as waterlogging, drought, and high temperature will happen frequently.

  Protoplasts Isolation and Culture Factors of Medicago sativa L.‘Xinmu No.4’ 2017, 33 (1):  137-141.  DOI: 10.11924/j.issn.1000-6850.casb16100018 Abstract + ( 752 )   PDF ( 690KB )   ( 381 ) The factor of alfalfa protoplasts isolation and culture were discussed, which could provide a basis for the establishment of protoplast culture system. Using cotyledons, hypocotyls and hypocotyl callus of Medicago sativa L.‘Xinmu No.4’as tested materials, the effects of pH value of enzyme, enzymolysis time, enzyme combination, different culture methods on protoplasts isolation and culture were studied. The results showed that when pH value of enzyme was 5.8, the yield of viable protoplast was the highest, at the same time, cell debris was fewer. The optimum enzymolysis time of cotyledons, hypocotyls and hypocotyl callus was 10 h. The enzyme concentration was 2.0% cellulase 0.5% pectinase 0.3% (or 0.5%) macerozyme, the yield of viable protoplast was relatively high. Using liquid medium and solid-liquid double layer medium, protoplast division was observed, but solid-liquid double layer culture was more favorable for protoplast division and culture of Medicago sativa L.‘Xinmu No.4’

  Egg Quality and Slaughter Performance of Xiushui Yellow Black Bone Chicken 2017, 33 (1):  142-145.  DOI: 10.11924/j.issn.1000-6850.casb16030207 Abstract + ( 605 )   PDF ( 392KB )   ( 385 ) To study basic production performance of Xiushui yellow black bone chicken, egg quality and carcass traits of chicken at 43 weeks were measured. The results showed that the average carcass dressing percentage and eviscerated yield percentage was 85.27% and 61.02%, respectively, indicating that the chicken had good carcass traits. Keel bone length had significant correlation with carcass weight (P＜0.05). Breast width had significantly and extremely positive correlation with dressed carcass weight, eviscerated weight, leg weight and leg muscle weight (P＜0.01). Haugh unit was (62.13±8.18), which was lower compared with that of other local varieties. Yolk weight was (15.03±1.27) g, which had no significant difference with that of other local varieties.

  Enrichment of Heavy Metals in Pseudorasbora parva from Crab Pond 2017, 33 (1):  146-150.  DOI: 10.11924/j.issn.1000-6850.casb16100041 Abstract + ( 620 )   PDF ( 480KB )   ( 379 ) In order to grasp enrichment characteristics of heavy metals in Pseudorasbora parva, make sure edible Safety of Pseudorasbora parva from Crab Pond, Samples of water and Pseudorasbora parva were respectively collected from crab pond and Nanyi Lake in April, August and December of 2015. Contents of Pb, Cu, Zn, Cd and Hg in samples of water and Pseudorasbora parva were measured by the atomic absorption spectrophotometry. The results showed that quality of water from the crab pond reached level Ⅰ according to the standard NY 5051—2001. The quality of water from Nanyi Lake reached level Ⅰ or Ⅱ according to Environmental Quality Standards for Surface Water (GB3838—2002). Contents of heavy metals in water increased with seasons. Contents of heavy metals in Pseudorasbora parva from different water areas were significantly different. Generally, contents of heavy metals in fish from crab pond was higher than those from the lake. Furthermore, pollution indexes of heavy metals in both fish samples were less than 0.5, and the contents of heavy metals in fish samples were within the standard range of NY 5073—2006.

  Farmers’Preference for Investment in Cultivated Land ——Difference Between Suburban and Outer Suburb Villages 2017, 33 (1):  151-157.  DOI: 10.11924/j.issn.1000-6850.casb16080082 Abstract + ( 725 )   PDF ( 610KB )   ( 477 ) Farmers'' preference for the investment in cultivated land is related to the sustainable utilization of cultivated land and food security. [Method]By using the participatory rural appraisal method, a random questionnaire survey was conducted among 512 farmers of five pairs typical suburban and outer suburb villages in Yunnan Province, and then made a quantitative comparative analysis on the differences in the preference for investment in cultivated land of farmers between suburban and outer suburb villages. [Result]The results show that: whether it was labor, machinery, capital and the total investment, the suburban villages were obviously lower than the outer suburb villages in the average investment for each farmer, but the suburban villages were larger than the outer suburb villages in the average investment for each cultivated land. In the investment structure of cultivated land in the suburban and outer suburb villages, the labor investment occupy the vast majority, and farmers of the suburban villages had stronger preference for labor investment but weaker preference for capital investment than the outer suburb villages, and the use intensity of cultivated land of suburban villages were higher than that of outer suburb villages. For the further willingness of investment in cultivated land, most farmers remained unchanged, but farmers generally tend to reduce the amount of labor investment and increase the capital investment in cultivated land, and the outer suburb villages are more prominent than the suburban villages. Farmers generally tend to reduce investment in good-quality cultivated land and reduce investment in poor-quality cultivated land, and the outer suburb villages are more prominent than the suburban villages. [Conclusion]In order to achieve the scale and sustainable investment of cultivated land as early as possible, measures should be taken as soon as possible to promote the smooth transfer of cultivated land and expand the scale of transfer especially in the outer suburb villages.

  Performance Evaluation of Policy-guided Agricultural Insurance Based on Different Perspectives in Jilin Province 2017, 33 (1):  158-164.  DOI: 10.11924/j.issn.1000-6850.casb15080065 Abstract + ( 621 )   PDF ( 581KB )   ( 503 ) Agricultural insurance of Jilin Province has achieved great development because of the implementation of policy-guided agricultural insurance since 2007. However, during the rapid development process of agricultural insurance, some problems have exposed in many aspects. Based on these, the study evaluated the policy- guided agricultural insurance performance from the perspectives of governments, insurance companies and farmers, and put forward recommendations to further improve agricultural insurance. The evaluation results showed that: policy- guided agricultural insurance in Jilin Province basically constructed a tripartite linkage mechanism of‘Governments Insurance Companies Farmers’, policies could be adjusted according to the specific needs of farmers gradually, but there were still some problems, such as the premium subsidy pressure of county financial, lower guarantee level, low efficiency claims, imperfect catastrophe risk dispersal system and so on. Thus, the three stakeholders (all levels of governments, insurance companies and farmers) should fulfill their coordination and interaction to further improve the policy-guided agricultural insurance.