Welcome to Chinese Agricultural Science Bulletin,

Special issue

    Not found Agricultural Engineering

    Default Latest Most Read
    Please wait a minute...
    For Selected: Toggle Thumbnails
    Design and Experiment of Hole-digging Mechanism in Fertilizer Deep-applicator for Orchards
    Wang Quan,Sun Songlin and Qiu Jin
    Chinese Agricultural Science Bulletin    2016, 32 (20): 147-154.   DOI: 10.11924/j.issn.1000-6850.casb16040087
    Abstract + (10059)       PDF (2568KB) (567)      
    Fertilizer machinery cannot easily pass through a close planting orchard, and the fertilizer utilization rate is low when using surface fertilizing. To solve this problem, quantitatively deep-fertilization method through placing granular fertilizer into dug holes was proposed. To put the method into practice, a small size fertilizer deep-applicator for orchards was designed, and its hole-digging performance was tested as well. The results showed that when the holes’ depth were 300, 350 and 400 mm respectively, the average diameter of the top of the holes were 207.7, 207.1 and 209.9 mm, the average diameter of the bottom of the holes were 206.3, 204.3 and 206.1 mm, and the average depth of the holes were 296.7, 345.9 and 395.4 mm, respectively. The errors of the holes’ diameter and depth were within 5 mm. And the digging efficiency was 34.5, 39.6 and 44.1 s, respectively, which could meet the requirements of hole-digging. The testing data provide a technical reference for the industrialization of fertilizer deep-applicator for orchards.
    The effective division in bidding and tender for agricultural construction projects
    Journal of Agriculture    2014, 4 (12): 87-90.   DOI: 10.11923/j.issn.2095-4050.2013-xb0866
    Abstract + (2810)       PDF (1212KB) (1173)      
    A full tendering procedure contains mainly six parts, namely, bids, tenders, bid opening, bid evaluation, bid winning and contract signing according with the tendering and bidding law of People's Republic of China, including agricultural construction projects. Agricultural construction project is more extensive in arrangement of constructional content and more divisions of bidding and tender than the regular construction ones. So it’s crucial to operated in a scientific, rational, legitimate and realistic way to guarantee its success in every detailed process. The bidding package related perspectives of laws and regulations, project technology, fully potential competition of bidders, tender cost and evaluation were discussed in the present study. We are expecting to find a specific manifestation and effective principles and criterions in tender division based on the specific cased we used, and provide references to professionals for bidding and tenders in agricultural construction projects.
    Effect and Problems of Pushing the Construction of New Countryside Forward by Distance Training
    Journal of Agriculture    2011, 1 (3): 51-56.   DOI: 10.11924/j.issn.2095-4050.2011-xb0299
    Abstract + (2623)       PDF (1058KB) (2520)      

    Abstract: The farmers are the ultimate application persons who change the agricultural science and technology into productivity. The distance training on rural practical technology can increase the efficiency of farmers’ applying the agricultural science and technology. After the Survey of the present situation and effect of distance training on rural practical technology in the south of Fujian Province, the authors narrated the remarkable success of bringing about a great advance in the industry of characteristic agriculture, the industry of no pollution vegetables, the industry of methane technology, and the remarkable success of promoting the construction of new countryside, promoting the transfer of rural labor, promoting the farmers to increase their incomes and become rich by distance training. And the urgent problems which existed in distance training were analyzed. The countermeasures and suggestions of counteracting the distance training’s weaknesses in many ways, conducting distance training of regional characteristic agriculture, conducting distance training according to the farmers’ different educational level and different technology needs, broadening farmers’ outlook, changing farmers’ ideas were put forward.

    Approach and practice of Climate-smart agriculture
    Journal of Agriculture    2015, 5 (9): 117-124.   DOI: 10.11923/j.issn.2095-4050.cjas15010030
    Abstract + (2485)       PDF (1373KB) (1230)      
    [Objective] “Climate-smart agriculture”(CSA) is agriculture that sustainably increases productivity, resilience (adaptation), reduces greenhouse gases (mitigation), and enhances achievement of national food security and adaptability of climate change.[Method]The review introduced the background, definition and approach of CSA, and presented the practice pattern and successful cases in the world. [Result] CSA is a kind of new agricultural development option. For this, necessary transformation should be made in current agricultural system through integrated soil, water, genetic resources and food value chain management. [Conclusion]China needs to promote the development of CSA on the basis of global experiences and its national conditions.
    Advances in Ecological Compensation of Facility Agriculture in Tianjin
    Journal of Agriculture    2011, 1 (6): 29-35.   DOI: 10.11924/j.issn.2095-4050.2011-xb0461
    Abstract + (2299)       PDF (1013KB) (1930)      

    The developing situation of the modern facility agriculture and corresponding policy measurements of agro-ecological compensation in Tianjin was overviewed. Regarding to the ecological environmental problem in the development of the intensive facility agriculture, learning from EU advanced environmental-friendly technical measures and successful policy management experiences, based on the demonstration and achievement of international cooperative projects between Sino and EU, Sino and Germany, policy suggestions, including to study on the agro-ecological compensation in the facility agriculture; to draw up agro-ecological compensation developing scheme of Tianjin and to set up special subsidy or fund of which, combined with coastal metropolis agro-characteristics, to perfect technical support system of facility agriculture agro-ecological compensation (FAAEC); to establish monitoring and evaluating system on FAAEC of coastal metropolis; to enhance farmers organized level, to promote industrial progress of the facility agriculture, was put forward to provide theoretical and practical reference for the Tianjin government.

    Studies on Transgenic Tomato Plants with Resistance to Tobacco Mosaic Virus and Cucumber Mosaic Virus
    Liao Junjie , Li Jinjin, Xu Jiyong
    Chinese Agricultural Science Bulletin    2005, 21 (8): 28-28.   DOI: 10.11924/j.issn.1000-6850.050828
    Abstract + (1997)            
    The TMV CP gene was synthesized with Polymerase Chain Reaction (PCR) y using the cDNA of its genomic RNA as a template. A synthetic ClaⅠsite was included in T5 primer while a BamHⅠsite in T3 primer, the PCR product was cloned into the ClaⅠ/BamHⅠ site of pBluescript KS+. Then bivalent plant expression vector, pKDTC (TMV-CP+CMV-CP), with double resistance to TMV and CMV, was constructed, in which each CP gene was controlled by a 35S promotor of CaMV. Transgenic tomato plants were regenerated via Agrobacterium transformation system, and analyzed by dot blot, PCR and Southern blot, these results showed that both genes were integrated into the transgenic plant lines L-2, L-5 of Lichun and JH-6 of Jinghan No 1. The transgenic plants grew normally and obviously resisted to the infection of corresponding viruses in greenhouse.
    Advances in Research on genetic engineering regulated ripening of fruit
    Chen Ming ,Chen Jinyin
    Chinese Agricultural Science Bulletin    2004, 20 (2): 15-15.   DOI: 10.11924/j.issn.1000-6850.040215
    Abstract + (1965)       PDF (294469KB) (880)      
    This paper mainly concerned about the advances in research on enzymes(ACS、ACO、PG and PE) related to ethylene biosynthesis and cell wall decomposition during fruit ripening and the relevant genetic engineering investigations in regulating fruit ripening.
    Retrospection and expectation of Social Assessment Impact of Project Engineering
    Yang Huajun, Yang Qingyuan,Xie Deti, Xie Jinning, Lu Chunyang, Wang Zhaolin
    Chinese Agricultural Science Bulletin    2007, 23 (8): 588-588.   DOI: 10.11924/j.issn.1000-6850.0708588
    Abstract + (1911)            
    With the emphasize on the principle of focusing on people and sustainable development ,Social Assessment Impact of project engineering was more and more important .but at present, SIA had not been standarded,in this paper, the author retrospected the history of social assessment ,concluded its concept、content, method ,discussed the key problems, and expected the trend of SIA.
    Research Progress and Prospect on Sugarbeet Genetic Engineering
    Sun Yaqing, Shao Jinwang, Zhang Shaoying
    Chinese Agricultural Science Bulletin    2007, 23 (4): 27-27.   DOI: 10.11924/j.issn.1000-6850.070427
    Abstract + (1889)       PDF (173080KB) (620)      
    Study on sugarbeet genetic engineering is one of the hot topics on sugarbeet, some progress have been achieved during the past few years, which aimed to obtain new variety (or line ) with new character by molecular biological means and gene transferring technique. In this paper, we summarized the achievements mainly according to the following aspects: the application, research methods and security estimate. Its limitation and possible future directions for sugarbeet genetic engineering research were analyzed.
    Application and Prospect of Plant Genetic Engineering in Crop Breeding
    Hou Wenbang, Zhu Wenwen, Ma Zhanqiang
    Chinese Agricultural Science Bulletin    2005, 21 (1): 128-128.   DOI: 10.11924/j.issn.1000-6850.0501128
    Abstract + (1820)       PDF (1390913KB) (1196)      
    This paper introduced the study on insect resistance, disease resistance, weedicide resistance, stress tolerance, improving quality, improving development, increasing photosynthesis and efficiency of azotification in crop breeding, and expatiated methods and benefits of gene engineering in improving crop variety. The important crops acquired by gene engineering have included soybean, maize, cotton, rapeseed and tobacco. These crops have been planted in agricultural production and acquired enormous benefits of economy, society and environment. Analyzed the prospect of genetic engineering in crop breeding and hope to cultivate special crop variety. The problems of scarce resource, deteriorating environment and declining benefit have been solved, insured persistence and stabilization of agricultural development.
    Selection of Mechanized Cultivation Sorghum Hybrid “Longza No.7”
    Jiao Shaojie
    Chinese Agricultural Science Bulletin    2006, 22 (2): 140-140.   DOI: 10.11924/j.issn.1000-6850.0602140
    Abstract + (1820)       PDF (57303KB) (483)      
    “Longza No.7” is a premature mechanized cultivation sorghum hybrid, which selected from Long 149A-Wai 4 with normal method by plant breeding institute of Heiliongjiang academy of agricultural science. This hybrid’s growing stage is 92d. Its accumulated temperature is 2150℃. Its plant height is 140cm. Its yield is 6098.5 kg/hm2. The hybrid is resistant to leaf disease and head smut. It was examined and approved by Heilongjiang crop variety examination committee in 2003.
    Major Agricultural Meteorological Disasters and Prevention of Myrica Rubra in Zhejiang
    Jin Zhifeng, Wang Lihong, Feng Tao, Yuan Dehui, Wang Kangqiang
    Chinese Agricultural Science Bulletin    2007, 23 (6): 638-638.   DOI: 10.11924/j.issn.1000-6850.0706638
    Abstract + (1811)       PDF (235346KB) (734)      
    With the adjustment of planting structure, Myrica rubra has become the second largest fruit industry. Because of frequent meteorological disasters, climate is one of the factors which restrict the growth of Myrica rubra. According to material in climate and the situation of disaster, in this research, statistic method was applied to analyze distribution and outbreak regularity of primary meteorological disasters, such as frozen injury,high temperature, drought, and gale, and preventive measures were brought forward to ensure Myrica rubra with high quality and yield.
    Discuss the Status and Development Strategies of Energy Plants Jatropha curcase L
    Ou Wenjun, Wang Wenquan, Li Kaimian
    Chinese Agricultural Science Bulletin    2008, 24 (9): 496-499.   DOI: 10.11924/j.issn.1000-6850.2008-0290
    Abstract + (1773)       PDF (650706KB) (1372)      
    The energy plant of Jatropha curcas L., belonging to Jatropha Linn of Euphorbiaceae, is a deciduous shrub or small arbor, it has a wide range adaptation of drought-resistant and barren, its toxic and biologically active substances can be used as pesticides and medicine. Its seed produce oil can be used as bio-diesel. Now it’s widely cultivated and distributed in the tropics and subtropics regions. More and more countries and companies want to develop this plant for producing bio-diesel. This paper mainly reviews the energy plant on following aspects: Origin and centre of diversity, Distribution, Botanical description, Genetic resources, the trend of development and utilizations etc, Analyzed the status of Plantation and Exploitation, Finally, Given constructive suggestions for better developing Jatropha system.
    Continuous Microwave Assisted Pyrolysis of Corn Cob for Producing Bio-Oil
    Chinese Agricultural Science Bulletin    2009, 25 (24): 559-564.   DOI: 10.11924/j.issn.1000-6850.2009-2191
    Abstract + (1773)       PDF (822046KB) (1668)      

    Continuous Microwave Assisted Pyrolysis of Corn Cob for Producing Bio-Oil Wan Yiqin1,2, Wang Yingkuan2,3, Liu Yuhuan1,2, Lin Xiangyang2,4, Paul Chen2, Roger Ruan1,2 (1. State Key Laboratory of Food Science and Technology, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China; 2. Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN 55108, USA; 3. Chinese Academy of Agricultural Engineering, Beijing 100125, China; 4. College of Biological Science and Technology, Fuzhou University, Fuzhou 350108, China) Abstract:Research and application of biomass energy are receiving global attention. The existing biomass technologies mainly focused on producing bio-fuel ethanol by fermenting starch-based biomass, and the large-scale exploration of biomass pyrolysis is still at an experimental stage. However, their applications are limited to low cost-efficiency. The authors’ research group developed a complete set of continuous microwave assisted pyrolysis(MAP) test equipment with a biomass-pyrolyzing capacity of 50-70 kg/h, based on the previous experimental studies on batch MAP of biomass. The self-developed continuous MAP equipment was used to produce bio-oil from untreated corn cob and corn cob pretreated with dilute sulphuric acid. The bio-oil products with different components were obtained. The analysis shows that the compositions of the bio-oil produced from corn cob pretreated with dilute sulphuric acid were relatively simpler and less using Gas Chromatography-Mass Spectrometry (GC-MS). The research results provide theoretical basis and test rig reference for producing bio-oil from agricultural and forestry wastes.

    Research of biodiesel preparation by lipase from different bacterial sources
    Chinese Agricultural Science Bulletin    2010, 26 (4): 318-322.   DOI: 10.11924/j.issn.1000-6850.2009-2294
    Abstract + (1755)       PDF (1223297KB) (2890)      

    Non-renewable energy sources is declining. The technology of lipase catalyzed synthesis biodiesel has been paid extensive attentions. This paper reviews the research status, technologic feature and industrial application progress of lipase from different bacterial sources in the preparation of biodiesel. Meanwhile, it points out the tendency of the research and development of lipase catalyzed synthesis biodiesel.Lipase-catalyzed preparation provide ideas of biodiesel in future.

    Research Progress of Equipment Standard for Healthy Aquaculture
    Journal of Agriculture    2011, 1 (6): 49-52.   DOI: 10.11924/j.issn.2095-4050.2011-xb0207
    Abstract + (1740)       PDF (843KB) (1550)      

    For reasons of perfecting standard system, shepherding aquaculture facilities amending standards in the country, achieving the combination of technology innovation and standardization, for meeting the needs of sustainable development of fisheries, according to the research and collecting the information at home and abroad, combing the existing relevant standards about aquaculture facilities and classification discussion, we recomposed the standard system of aquaculture facilities on the base of “Principles and requirements for preparing diagrams of standard system” and “Guideline for the work of complex standardization”. This paper reviews the development of China healthy aquaculture, briefly introduces the current situation of equipment standard for healthy aquaculture, and points out the direction of future development.

    Current Status and Prospect in Plant Chemical Control Cultivated Engineering Technique Research
    Gu Wanrong, Ge Ziqiang, Chen Yuan, Chen Dehua, Wu Yunkang
    Chinese Agricultural Science Bulletin    2005, 21 (7): 400-400.   DOI: 10.11924/j.issn.1000-6850.0507400
    Abstract + (1709)            
    For the purpose of high-yield、high-quality、high-efficiency and sustainable development , how to improve the crop’s yield potential further will be a arduous task for a long time in our agricultural science and technique. The plant chemical control cultivated engineering techniques is a new technological complex induced through the combination of chemical (Plant Growth Regulators) application and traditional techniques. It becomes one of the most active fields in agricultural research and plays great importance in all aspects of crop cultivation. The history and achievements are summarized in the fields of research and application of plant chemical control cultivated engineering technique in our country. The paper emphasized the importance and necessity of chemically-controlled crop culture engineering techniques in Chinese agricultural developments. The tendencies of research and application in plant chemical control cultivated engineering technique are prospected in new century.
    Research on Environmental Protection and Soil and Water Conservation in Ruiguang Heat-engine Plant of Shanxi
    Jiao Yizhi, Wu Zhilian
    Chinese Agricultural Science Bulletin    2007, 23 (6): 642-642.   DOI: 10.11924/j.issn.1000-6850.0706642
    Abstract + (1708)       PDF (99204KB) (550)      
    With the power system constructing in Shanxi Province, the environment of the whole district is turning for the worse. In some parts it even leads to soil erosion. According to researching on the impact of the projects construction for environment and the characteristic of soil erosion in Ruiguang heat-engine plant of Shanxi, put forward appropriate measures for soil erosion, such as construction protection and vegetation restoration, from industrial area, residential district, transport road, coal ash yard and waterpipes. It avoids soil erosion from the projects construction effectively, improves environment at the same time, in order to supply reference for the same kind projects in Shanxi Province and build harmonious society.