Current issue

• 2003 Vol.19 No.3 Published:25 June 2003

  目次

  The Study of growth Characteristics of Commelina Communis L and its pesticide control in Soybean field Hu Fan Fu yingchun Piao Ying Wang Hongwu Li Weiping zhang guangcheng 2003, 19 (3):  9-9.  Abstract + ( 1391 )   PDF ( 303912KB )   ( 529 ) The growth and the development of Commelina communis L and its biological characteristics and pesticide prevention and control were studied in this paper. The seeding emergence occurs in the middle of May,while its peak emergence is in the end of the month.The peak period of the vegetative growth is in the end of July. The depth of 5cm from the seeds to the soil surface is favorable for the seed emergence, and no seed emergence was investigated in the depth of 20cm.By mean of sieving exporiment,the Best treatment soil agent of competition Commelina Communis L is 72% Dual and 36% Nongcaojing ,the best treatment agent of leaf surface is 48% Command and 24% Cobra , meanwhile making alargee scale experiments and demonstrations.

  Management and control of nutrient solution of the technique of infinite-growth-typed tomato cultivated by DFT Song Weitang, Zhang Shuge, Huang Zhidong 2003, 19 (3):  13-13.  Abstract + ( 1804 )   PDF ( 362328KB )   ( 713 ) On the basis of synthesizing various nutrient solution doses of tomato culture, national and abroad, and according to the qualities of water in Beijing and the unconventional culture, a new kind of the nutrient solution doses under the unconventional culture of infinitive-growth-typed cultivated by deep nutrient solution flow was formulated. According to different qualities during different periods of tomato growth and development, the components, concentration, acidity-alkalinity, etc. in nutrient solution were adjusted, and a dynamic management to the flow was carried out. The results of the planting experiments showed that the various nutritive components (N, P, K, Ca, Mg, etc.) in the dose could be balancedly absorbed by tomato, and that the dose was nutrition-balanced.

  A Comparison of the Effects of Two Arbuscular Mycorrhizal Fungal Species on Photosynthesis,Transpiration and Water Use Efficiency of Wheat Ye Aihua , Yuan Yi , Yang Li , Cai Yongping , Tian Shengni 2003, 19 (3):  18-20.  Abstract + ( 1263 )   PDF ( 215497KB )   ( 548 ) Drought is a major restriction to plant growth. AMF (arbuscular mycorrhizal fungi) can increase the absorption of nutrition , facilitate the growth of plant and improve drought resistance of many plants. The experiment compared the effects of two AMF species on wheat at 10 % water level . The wheat inoculated with 90089 and 90036 decreased stomatal resistance , increased net photosynthetic rate , stomatal conduction , tran2 spiration rate and WUE compared with the control .

  Hybrid Rice Teyou 524 Fertility Character Steady Character And Adaptive Character Analysis Chen Yuexu，Xu Daxiong, Chen Wenzhen 2003, 19 (3):  21-21.  Abstract + ( 1335 )   PDF ( 233940KB )   ( 586 ) Using the regional trial data of Guangdong hybrid rice in 1994 and 1995 , and regional trial data of national late hybrid indica rice in 1995 and 1996, by t test, variation coefficient and regress coefficient, analysis and compare with the fertility character, steady character and adaptive character of Teyou 524 and ck (Shanyou 63, Shanyougui 33) , the result showed: It was obviously that the fertility character and adaptive character of Teyou 524 was better than ck ,but steady character was between Shanyou 63 and Shanyougui 33, it was a quite good lat-mature and high-yield new hybrid rice combination .

  The principal component analysis and cluster analysis on agronomic characteristics of transformed BADH gene rice coerced by NaCl Sun yao-zhong Dong fang-yang Zhou li-yan Chen shou-yi Du bao-xing 2003, 19 (3):  23-23.  Abstract + ( 1527 )   PDF ( 301880KB )   ( 543 ) The nine agronomic characteristics of 31 transformed BADH gene rice species coerced by 0.5 g/L NaCl , namely , ear sprouting period, plant height, ear length, valid ear number per plant ,ripe ear rate ,actual grain number per ear ,fruit bearing rate ,weight of 1000 grains and grains weight per plant were studied through principal component analysis and cluster analysis .Find out five principal components, whose characteristic root accumulate contribute rate were 86.86%. On the base of this, classified the 31 species into four sorts, when Euclidean distance was 2.0 (D=2.0) .The first sort including 10 species belong to more ear sort, the second and the fourth sort including 16 species had better synthetic economic characteristics, and the three sort including 5 species belong big grain sort.

  Effect of Nitrogen Fertilizer and the Genotypes on Nitrogen Uptake of Maize Institute of Crop Breeding and Cultivation, Chinese Academy of Agricultural Sciences, Beijing 0008; .Shenyang Agriculture University, Shenyang 0 2003, 19 (3):  26-26.  Abstract + ( 1310 )   PDF ( 301880KB )   ( 455 ) The nitrogen(N) uptake by 11 maize hybrids in a field trial with three replications at four rates of N supply were researched. Results showed that the N uptake is significantly different among the genotypes. The different of N uptake by grain, straw and biomass of aerial part between highest and lowest genotype in N2 treatment are 1.060,0.134 and 1.125g/kg, respectively, and that in N4 treatment are 0.836,0.154 and 0.954g/kg,respectively. The difference of N uptake by different genotypes in low N treatment is higher than in high N treatment. N fertilizer rate influence the N uptake by the maize remarkably. There is very significant positive correlate between N uptake by grain, straw and aerial part and corresponding outputs of that.

  Study on techniques of high yield and quality of male sterility seed production in maize Chen-Julin Yan-Baoluo Zou-Renfeng Wang-Guosheng 2003, 19 (3):  32-32.  Abstract + ( 1312 )   PDF ( 207242KB )   ( 593 ) Maize sterility seed production in maize with many excellences to common Seed production ,it con avoid emasculation by hand, reduce the seed production cost and improve seed quality ,it also can amplify heterosis mostly .Study the characteristics of the parents of heterosis restoring hybrids ST501 and the mainfactor that affects the yield and quality of seed production .Advance the selectivepreference cultivation combination for yields 4500kg to 5250kg per ha. From the preference cultivation combination for yields 4500kg to 5250kg per ha. From themain factor of the quality of the parents ,florescence regulation ,planting densities，prescribed fertilizer supplying, preventing diseases and insects ,artificial pollination ,timely gaining.

  Study on Screening of Natural Germination Inhibitors Fu Jinfeng Wang Fengbao Dong Lifeng Chen Jianming Zheng Ya-Jie 2003, 19 (3):  35-35.  Abstract + ( 1242 )   PDF ( 322651KB )   ( 542 ) In order to find ideal natural depressors of preharvest sprouting in wheat, the experiments were carried out, i.e. searching them from chaff, spike-stalk, leaf and stem in ripen wheat plant and other foliages. The results were as follows: these four sorts of organs all contained germination inhibitors, but they had low restraining function. YSR was obtained from other foliages, and its function effect was obvious. YSR appropriate application concentration of restraining grain germination was 240g/l. Extracting one day was enough. Interaction didn’t exist between YSR and wheat varieties.

  Analysis of nutrition in leaf of sea-island cotton and upland cotton Zhang Xingling Chen Yujuan Li Xingyu Wang jichuan 2003, 19 (3):  41-41.  Abstract + ( 1387 )   PDF ( 215587KB )   ( 535 ) Nutrition in leaves of sea-island cotton and upland cotton was analyzed, the results showed that the content of N,K in leaves of sea-island cotton was less than that of in upland cotton while, of Mn,Cu,Mg was more than that of in upland cotton. The volume of absorb of Cu, B in seeding stage and of P,Zn,Cu in bud stage and of Mg,Mn,Cu in flowering and fruiting stage in sea-island cotton were more than that of in upland cotton, and, this difference was lasting to the later stage, so in practical manuring we shonld adopt different methods.

  Effects of soil physical and chemical properties on tea quality in Wujiang river basin Liang Yun-fa , Tian Yong-hui ,Wang Gou-hua ,Wang Jia-len ,Zhou Gou-lan 2003, 19 (3):  44-44.  Abstract + ( 1766 )   PDF ( 204771KB )   ( 659 ) This paper studis soil physical and chemical properties on tea quality in Wujiang river basin. The result showed that soil physical and chemical properties ,and tea quality were different for different maternal rock. The soil physical and chemical properties and tea quality were the siliceous yellow soil ﹥the yellow soil of sandy shale ﹥the yellow clay Quarternary Period﹥the small yellow mud ﹥the yellow-brown forest soil

  Research on softening and senescence of the Chinese Jujube Fruit (Zizyphus Jujuba Mill. cv. Dong) WU Yan-jun Yang Li WANG Chun-sheng ZHANG Ji-shu 2003, 19 (3):  47-47.  Abstract + ( 1530 )   PDF ( 228144KB )   ( 532 ) The changes of firmness, respiratory rate, PE activity, PG activity, SOD activity, POD activity and MDA contents in Jujuba fruit were studied after they were harvested at half-red stage. The results showed that the firmness changed with the stages; and the change of PE activity was negatively correlated to the change of firmness, PG night be attend the start of softening. The activity of SOD and POD showed the declined trend with the softening, the correlated coefficient between SOD, POD and firmness wasn’t notability. The change of MDA contents was negatively correlated to the changes of firmness.

  Research on Micropropagation Technology of Fodder-type Locust Wang xiali Zhong shichuan Cao banghua Wangping 2003, 19 (3):  51-51.  Abstract + ( 1346 )   PDF ( 323257KB )   ( 690 ) Using four times the sizes of fodder-type locust ingredients of hormone.consistency.culture conditions and other factors that were put into the culture medium,that had various effects on multiplication,quick brreed.striking root and transplant. The results showed that MS+6-BA0.5mg+NAA0.05mg/L.cane sugar 30g/L.culture temperature 25-27℃.light intensity 1500Lx or so.sunshine time 12 hours per day-all of these were of greatest advantage to the multiplication of tender sprout.1/2MS+NAA0.5mg/L.cane sugar 20g/L.temperature 25-27℃.light in tensity 2500Lx.sunshine time 12h .culture 20d , its rate of striking root might reach 81%.

  Evaluation on Contamination of Nitrate and Nitrite in Vegetables of Fefei Region Li Xuede Yue Yongde Hua Rimao Tang Feng Xu Zhengsheng Wang Jinian 2003, 19 (3):  54-54.  Abstract + ( 1640 )   PDF ( 224384KB )   ( 645 ) The contamination level of nitrate and nitrite of main vegetables collected from six vegetable markets in Hefei was investigated and evaluated. The results showed that The contents of nitrate in vegetables varied significantly with different kinds of vegetables,i.e.,leaf vegetables>legumes>root vegetables>egg plants>gourds,52.9 percent of the investigated vegetables were contaminated slightly,35.3 percent of the vegetables were contaminated moderately and 11.8 percent of them were contaminated heavily. The contents of nitrite in all investigated vegetables were lower than the hygienical criterion and the order of contents of nitrite was leaf vegetables>legumes> egg plants>gourds >root vegetables ;The contents of nitrate and nitrite in leaves of same vegetable were higher than that was in petioles.

  Effects of Different Kinds of Anions on the Growth of Cucumber Seedlings LI Hai-yun, WANG Xiu-feng, WEI Min 2003, 19 (3):  57-57.  Abstract + ( 1154 )   PDF ( 313561KB )   ( 577 ) The effect of four kinds of salt (KCl, KNO3, K2SO4 and PEG) under three different osmotic potential on growth of cucumber seedlings was studied in condition of solute culture. The results showed that: compared with three kinds of inorganic salt at the same osmotic potential, PEG had the highest restrain degree on growth of cucumber. Although amount of soluble sugar and Pro accumulated in cucumber leaves that were treated with PEG was the most, osmotic adjustment ability was the worst. The affective degree of different anion on activity of protect enzyme in cucumber leaves was different . The main reason of injury three different kinds of anions to cucumber was osmotic stress, and ion stress was minor factor within this experiment scope of salt density and treatment time .

  STUDY ON CALLUS INDUCTION AND PLANT REGENERATION OF SWEET POTATO ZHOU Li-yan GAO Shu-guo BI Yan-juan QIAO Ya-ke YANG Wen-li 2003, 19 (3):  61-61.  Abstract + ( 1669 )   PDF ( 342072KB )   ( 594 ) Culture the stems, leaves and petiols of sweet potatos into MS mediums added different plant grow regulators to induce callus and regenerate plant. The result showed that the callus growth and their differentiation were effected by plant grow regulators, genotypes and explants. “lu xuan 1” was better than “yi wo hong” in differentiation .stem was the easiest among the three explants in differentiation. 2,4-D1.0~2.0mg/L+KT1.0mg/Lwas good for embryogenic callus induction.

  The establishment of the simulated system of drought for soybean in laboratory Yang Jianping,Chen Xuezhen,Wang Wenping,Li Yang 2003, 19 (3):  65-65.  Abstract + ( 2225 )   PDF ( 232964KB )   ( 868 ) Taking the three species of soybean widely planted in Beijing as the material, we compared the activity of NR, CAT and POD in the plant of the soybean at the osmotic stress of the five different concentration of PEG6000, analysed the content of the chlorophyll and free proline. The results indicated that all of the indexes had shown a significant difference under the treatment of the 5% of PEG6000 by the distinct analysis. The most appropriated concentration of PEG6000 in the simulation of aridity treatment in the laboratory was 15%.

  Determination of Flavonoids in Pomegranate Husk and Sedimen Xu zongyun Jiang hui Wu jing Yingl u 2003, 19 (3):  72-72.  Abstract + ( 1392 )   PDF ( 157028KB )   ( 823 ) The flavonoid compounds are large sort of crude product which widely exist in the nature, it variety of structure and spectrum ability of lively activity are focus that are researched and exploited in oversea and our country .At present ,many researches regard rutin quercetin as criterion calibre ,then carry out content determination of flavonoid in the plant .This research regards rutin as contrast calibre ,and determine content of total flavonoids in pomegranate husk and sediment in Nanjiang by spectrophotometry. The result indicate that the pomegranate husk contains 6.65% of flavonoids and sediment contains 2.04% of flavonoids. This research provide reference evidence when we legitimately use resource in Nanjiang.

  Tissue culture and propagation of Spathiphyllum Zhu Gen-fa 2003, 19 (3):  75-75.  Abstract + ( 1443 )   PDF ( 278128KB )   ( 710 ) Tissue culture and propagation of 5 Spathiphyllum varieties were studied. The concentration of 6-BA 3mg/L is suitable for shoot propagation. 255 mg/L KH2PO4 in MS medium is better to shoot propagation than the concentration in MS basic medium. The best medium for rooting is 1/2MS adding with 0.5mg/L NAA and 0.5% AC.3mg/L 6-BA is proper to inducing embryoid of florescence in high frequency.

  Natural Occurrence of Arbuscular Fungi in Chinese Tree-peony. Guo Shaoxia, Meng Xiangxia, Zhang Yugang, Wang lianying 2003, 19 (3):  77-77.  Abstract + ( 1446 )   PDF ( 214256KB )   ( 637 ) Natural occurrence of arbuscular mycorrhizal(AM) fungi in Chinese tree-peony was investigated in Luoyang of Henan province and Heze of Shandong province. The results showed that AM fungi was presented in all the investigated trees, but the infection percentage varied with localities and varieties. The infection percentage of tree-peony was the highest in Zhaoloumudanyuan of Heze, and among the five varieties, the infection percentage of ‘Fengdan’ was the highest.

  Effects on rape roots of soil′s mimicry acidifying in green shed ZHANG Chang-ai LAO Xiu-rong 2003, 19 (3):  79-79.  Abstract + ( 1060 )   PDF ( 238562KB )   ( 518 ) In this article,we explored the biological and ecological responses of rape roots to acidify by the mimicry acidifying pot experiments. The results showed that:roots weight,root vitality,root volume,root length and root absorption of nutrition element are all be affected by the change of PH..At the same time we found that rape root should be damaged if PH under 4.8.

  Application of Monose and Disaccharide in the Production of Edible Fungi Gao Huidong 2003, 19 (3):  82-82.  Abstract + ( 1269 )   PDF ( 182219KB )   ( 607 ) Four different kinds of solution that contain glucose, sucrose or their derivatives are made, and their efficacy on edible fungi is estimated. Producing non-polluted edible fungi will benefit from utilizing scientifically those solutions.

  Application of Antisense RNA Technique in Crop Improvement Xu Benbo, Zhang Xuekun, Li Jiana 2003, 19 (3):  84-84.  Abstract + ( 1474 )   PDF ( 328322KB )   ( 764 ) The antisense RNA technique and its application in crop improvement were reviewed , main including(1) application in ripening control of some fruits:(2)application in enhancing plant resistnace to diseases; (3) application in improving quality of crops; (4)modification colours of flowers; (5) application in malesterility control of some crops .

  Study on and Application of Fertilization Techniques for High-Yield and Good Quality in Soybean Guo Qingyuan, Li Zhiyu, and Tu Xuewen 2003, 19 (3):  89-89.  Abstract + ( 1900 )   PDF ( 414247KB )   ( 789 ) The characterization of nutrition in soybean plants and corresponding techniques for fertilizer application were summarized in this article. The amount of major nutrients needed by soybean plant was generally higher than most cereal crops such as rice and wheat under similar grain yield. The absorption and accumulation of the major nutrients (nitrogen, phosphorus, potassium) reached highest during flowering and podding stage. About 40%-60% of the nitrogen in soybean plant was from symbiotic nitrogen fixation with Rhizobia. The N-fixation was considerably influenced by many factors including soil texture, nutrients status and pH. The ratio of nutrients transferred from the vegetative tissues to the grains in soybean was also generally higher than most other crops. Soybean yield could be 2025-4500 kg/hm2 through balanced utilization of N, P, K, Zn and Mo. Nitrogen and phosphorus could increase the protein content while potassium and Zn could increase the oil content. Desirable amount of fertilizers in soybean production would be decided based on the soil nutrient status. Reasonable combination of organic manure with N, P, K, and Rhizobia inoculants was crucial for achieving high yield. Special attention should be paid to the fertilization of the previous crops in terms of improving soil fertility. On soils with moderate fertility, 120 kg N, 60 kg P2O5, 60 kg K2O, 22.5 kg ZnSO4 per hectare would be applied. Fertilizers of P, K, Zn could be applied before field preparation while half of N and Mo could be applied during planting and the rest half could be applied during flowering and podding stage.

  The Effects of Calcium on Salt-tolerance in Plant Dai Gao-xing Peng Ke-qin Pi Can-hui 2003, 19 (3):  97-97.  Abstract + ( 1846 )   PDF ( 276251KB )   ( 2057 ) The effects of exogenous calcium on plant under salt stress are reviewed in this article.calcium could improve the salt-tolerance capability ,inhabit the production of active oxygen substances,protect the structure of cell plasma membrane and maintain normal photosythesis. The internal cellular Ca2+, moreover, act as a second messenger to transduct the salt-stress signal ,and regulate the physiological and biochemical responses in plant.

  Development of Crop Heterosis in Molecular Genetics 2003, 19 (3):  102-102.  Abstract + ( 1445 )   PDF ( 156592KB )   ( 763 ) Heterosis is a natural phenomenon widely existing in crops, the genetic mechanism of which was exploited in the past. With the development of molecular biology, the mechanism was further elucidated at the molecular level. In this paper, we reviewed the relationship between difference of molecular marker in the genome and heterosis, the effect of quantitative trait loci (QTL) on heterosis and the influence of genetic expression and regulation to heterosis. Utilization of chip technique in heterosis study was also prospected.

  The Situation and Prospect of Research on Perilla frustescens (L.)Britton Chen juan Guo Fenggen 2003, 19 (3):  105-105.  Abstract + ( 1235 )   PDF ( 299364KB )   ( 1029 ) This paper reviewed the achievements on genetic control of the chemical composition of volatile oil in Perilla frustescens and the comprehensive utilization . The research tendency of Perilla frustescens is also prospected.

  The Method and Ways of Adjusting Cropping Construction in Hilly Red Soil Regions-----Study and Practice in West Zhejiang Red Soil Experimental Zone CHEN Xi-jing, WANG Guo-fa, HAN Chang-can,XU Zi-fu ,JIANG Yong-qing&XI huei 2003, 19 (3):  110-110.  Abstract + ( 1356 )   PDF ( 324688KB )   ( 736 ) Based on study and practice in West Zhejiang Red Soil Experimental zone, the method and ways of adjusting cropping construction is: establishing “tri-elements structure” , increasing in the ratio of forage-crop and cash-crop, stabilizing grain-crop production, adjusting breeding construction, developing agricultural industrialization, planting green-feed, estblishing new patterns, developing labour-intesive products ,popularizing rice light cultivation ect.

  An Analysis of the Factors Affecting the Production Cost of Main Grain Plants Zheng Shaofeng 2003, 19 (3):  115-115.  Abstract + ( 1170 )   PDF ( 272312KB )   ( 775 ) The paper analyses the factors affecting the production cost of main grain plants in 1990s by index system and studies quantitatively impact of investment factors and their prices on production cost of main grain plants.

  The study of rapid measure methods for formaldehyde which endanger food safety and life environment yan shu-gang Liu hui Li yue-mei 2003, 19 (3):  122-122.  Abstract + ( 1280 )   PDF ( 251292KB )   ( 1391 ) In this paper, we particular study measure methods of formaldehyde which endanger food safety and life environment. We bring forward rapid effective reasonable methods about measure of formaldehyde content in different production.

  A New Pomegranate Disease Caused by Knot Nematode (Meloidogyne sp.) A new pomegranate disease caused by knot nematode was found in Huaiyuan Anhui Province 2003, 19 (3):  128-128.  Abstract + ( 1064 )   PDF ( 99432KB )   ( 485 )

  A Suggestion And Action For Agricultural StandardizationTo Promote Agricultural Sustainable Development Hu Bing-an 2003, 19 (3):  139-139.  Abstract + ( 1335 )   PDF ( 237557KB )   ( 612 ) After China enters into WTO, more attention are paid to agricultural standardization. This article expounds the action from 5 aspects of agricultural standardization to promote agricultural sustainable development and puts forward some counter-measures and advice to promote agricultural standardization so as to adapt to the new situation, after China enters into WTO . Especially we must conduct agricultural standardization and establish perfectly agriculture-standardization system in the future as soon as possible.

  Present Situation and Countermeasures of Protection of Intellectural Property Right for Agriculture In China Zhang Wenzhu, Li Jiawang 2003, 19 (3):  142-142.  Abstract + ( 1554 )   PDF ( 152372KB )   ( 868 ) Types, characterics and general situation of protection of intellectural property right for agriculture were outlined in this paper, meanwhile, present situation and problems on protection of intellectural property right for agriculture in China were discussed. In addition, countermeasures on strengthen protection of intellectural property right for Chinese agriculture was introducted.

  Reconsideration on Agricultural University’s Science and Technology Achievements Transformation Guo Laisuo 2003, 19 (3):  148-148.  Abstract + ( 1248 )   PDF ( 238617KB )   ( 575 ) This paper analyzes the positive function of agricultural university in science & fechnology innovation and the achievements transformation， and proposes some measures to promote the achieuements transformation， such as fostering original falents， risihg to the challenge of WTO， developing agricultural inclustries，colleges and academies，and hasfening the process of industrialization，etc.

  On the Financing Institutions Supporting YangLing Aricultural High-Tech Enterprises Wang Huiying 2003, 19 (3):  155-155.  Abstract + ( 1039 )   PDF ( 239046KB )   ( 481 ) The each financing institutions in Yangling gave more support to Yangling agricultural high-tech enterprises and sought various types of credit in order to meet the enterpries’ need. For all that, the enterprises’ loan need can’t be satisfied. The causes are the enterprises’ prolems themselves, the conditions of credit to more and the power of credit in Yangling fanancing institutions to small. We propose that the evaluating committee of agricultural high-tech enterprises should be set-up, the conditions of credit should be decreased, the power of credit in Yangling fanancing institutions should be expanded, the funds sources should be more and the quality of the bank employee in Yangling should be improved in order to support Yangling agricultural high-tech enterpises by credit.

  Promoting agricultural industrialization by adjusting agricultural industrial structure Take Gansu as an example 2003, 19 (3):  162-162.  Abstract + ( 1076 )   PDF ( 272414KB )   ( 483 ) Based on analysis to current situation and existing problems of agricultural industrial structure in Gansu Province, this paper suggests a series of approaches for upgrading the agricultural industrial structure in the province such as adjusting industrial structure by market orientation; forming-up specialized industry by exerting regional priorities; boosting agricultural industrialization by extending industrial linkages; enhancing international competitiveness by restructuring export pattern; reshaping government function and strengthening scientific and technological supports.

  A Study on the Culture Techniques of High Yield and Efficiency for the Hybrid Rice-Teyou 73 RAO Ming-dian，XU Xu-ming，CHEN Shao-ting，LIAO Chao-yang 2003, 19 (3):  171-171.  Abstract + ( 1331 )   PDF ( 241147KB )   ( 554 ) A comprehensive culture techniques for the Hybrid Rice-Teyou 73 was studied by the method of optimization design. Three influential elements for the culture techniques were leaf age in transplanting（x1），planting density（x2），quantities of nitrogen（x3）.The regression models of three elements with yield，net revenue were established. The results showed that three elements influenced the yield and net revenue. After simulated screening and optimal selection by computer，the comprehensive culture techniques of high yield and efficiency were 5-6 leaves for transplanting，as 175500-282800 hills per hm2，and 140-188kg N per hm2.

  Characteristics of Feng Hua Zhan ang Its Cultural Techniques Xiao Wen-qiang, Guo Ming-tao, Xie Yue-bo, Xiao Yong-xian,Huang Yong-hong 2003, 19 (3):  174-174.  Abstract + ( 825 )   PDF ( 143945KB )   ( 474 )