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- Abstract：Agricultural engineering profession has played a vital role in mechanizing agriculture, from farm machinery to rural electrification, from designing clear span wood trusses to protecting surface and ground water. To gain further efficiency and maintain sustainability, agricultural engineering will need to rethink the basics of production agriculture. The agricultural engineering discipline has already evolved into a number of different dimensions beyond mechanization for production, addressing such issues as precision agriculture, optimizing food production processes, improving air quality in buildings and vehicles, utilizing biomass and bioenergy, and reducing water contamination through biofiltration and runoff control. The result is an increasing biological science and application emphasis. Rapid advances in technology allow us to take advantage of developments in global positioning systems by, distributed power supply, nanotechnology, biosenscrs and robotics to develop precision agriculture, where each plant or animal can be treated as an entity to maximize profitability and to minimize environmental impact. Other constant challenges, such as biomass and bioenergy, are revitalized in our research and economic domains. To meet these challenges, we must educate our students, and the profession, to be able to adapt changes, that is, to be able to learn.0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In this article, a brief introduction was given to the history of the graduate education reform and development of China Agricultural University. The progress and experience of graduate education were summarized and evaluated. The future development and development priorities for graduate education were fully discussed. Suggestions are put forward that focus on best balancing the student enrollment, quality and benefit; actively promoting creation of discipline building, management system and education system for graduate education as well as further improving evaluation system for graduate education,0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Immunological stress induces growth depression, then lead to damage in animal production. The characteristic of immunological stress and its immunological mechanism to animal production were summarized,and the regulation of conjugated linoleic acid on growth and immune function of animal in immunological stress and its action mechanism were also elucidated in this review.1|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In recent years, RNA silencing is identified as a general and ancient defense mechanism of plants against to virus infections. Accordingly, during the long-term evolution, mechanisms against the RNA silencing of their hosts have been developed in viruses to evade or neutralize the defense system, in which expression of suppressors is a very effective strategy. During establishment of a successful infection, virus encoded suppressors interfere with the elements related to RNA silencing at different points of the regulation pathway. This reviewing paper is mainly focusing on the functional characteristics, identification of the suppressor proteins and the side effect during the processes, while the application and the prospect of suppressors studies are briefly discussed.5|8|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Economics of Plant Disease (studies on plant disease economy) was established based on the losses of economy and ecological effects of their environmental pollution caused by plant diseases and their mismanagement. According to the principles of plant diseases and Economics of Plant Disease, the core of plant disease management should be prevention rather than cure, namely protecting host plants rather than eliminating pathogens. We proposed to transform Integrated Pest Management (IPM) to Ecological Pest Management (EPM) with the rule of population health in the plant ecosystem.3|8|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In order to study the feasibility of commercialized growing genetically modified soybean (GMS) in China, some issues were analyzed systematically by using statistical data ,which included the development of GMS in the main countries for soybean production all over the world, and the problems that might be met when GMS was to be commercially grown in China. The results showed that during the period from 1996 to 2004, the adoption rate of GMS increased from 2% to 85% in USA, from 1 7% to 98% in Argentina, and from 0% to 22% in Brazil.The main reasons of the fast development of GMS in USA and Argentina were that GMS made the weed control in soybean production convenient and with high efficiency. The problems of commercialized growing GMS in China might include that the increase of soybean yield and profits gained in production was unstable; Soybean is originated from China and there is a unique consumption model of soybean in China; potential danger of bio safety and food safety of GMS may have great influences on soybean industry in China; and the soybean industry in China is short of competitive advantages in world market. Therefore, it is proposed that commercialized growing GMS in China should be prohibited continuously.Keywords：genetically modified soybean (GMS),commercialized growing,soybean industry in China,2|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In this article, the progress achieved in the development of China's horticulture science and technology is reviewed since its implementation of economic reform and opening policies. It indicated that horticulture production in China has distinct advantages in domestic agricultural economy and world horticulture industry due to the development of advanced biological science and technology, greenhouse production technology, post harvest technology and dynamic marketing system. The development prospect and trend for horticulture science and technology are discussed. Some suggestions are proposed including important roles of science and technology, and education in horticulture industry, modern management models for horticulture industry, etc.0|7|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In spite of the significant achievements of poverty alleviation programs in China since the opening policies in 1978, the pace of the reduction of the poverty population has been slowed down in recent years. There has been a long time argument on the accuracy of poverty population in rural China. The vulnerability of livelihood of poverty population, women poverty and other issues are still very harsh. This article summarized the poverty issues in China now.1|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The theories of moisture transfer inside a wet solid during a drying process, which were deduced base on the hypothesis of a continuous porous body, were reviewed. The hypotheses of their transformation mechanisms, the mathematical models, the merits and limitations, and the applications of these theories were summarized. Besides, some new and possible study trends on drying theory in the last decade and the near future, especially those obtained and to be obtained by applying the outcomes from other correlative fields, e.g. the pore network model, the multi-scale method and the fractal geometry, were anticipated for a deeper investigation into the micro mechanisms of inner transfer phenomena in solid.14|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Methodology of linkage analysis by means of QTL variance using maximum likelihood based on the framework of a random QTL effect model was present in the paper. The effects of putative QTL were treated as random effect in the model. The factors of influencing QTL mapping (e.g. QTL effect and heritability) were simulated in our study too. The results showed that random QTL model have a good behavior for QTL mapping, and have a higher statistical power. The estimated QTL parameters are close to the expected values with reasonable standard errors in our study. In addition, the accuracy of QTL mapping depended on the effect of putative quantitative trait loci and the value of heritability. With the increase of QTL effect and heritability, the accuracy of QTL mapping improved slightly. When the heritability and QTL effect were 0 5 respectively, the power attained maximum (88%).2|7|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Three types of stalks from high oil corn variety 647 (HOC647), conventional corn (CAU80) and specific fodder corn (FC3) were used to study the change of main chemical contents and digestibility of HOC647 stalks with kernel maturity stage and to compare the difference of HOC stalks with other variety stalks based upon the analysis of chemical components and measurement of digestibility and amount of gas production in vitro. The result showed that as corn kernels matured, HOC647 stalks had linear increases (L; P <0 01) in the contents of water soluble carbohydrate (WSC), starch , ether extract (EE), and the digestibilities of DM (DMD) and NDF (NDFD), which were 0 82%, 1 68%, 1 33%, 54 07% and 75 79% respectively at 1/2 milk line (ML); 2 93%, 2 12%, 1 88%, 57 11% and 46 36% respectively at 3/4 ML; 19 21%, 5 53%, 2 71%, 66 78% and 48 38% respectively at 4/4 ML. In contrast, there were linear decreases (L; P <0 01) in the contents of NDF, ADF and lignin which were 75 79%, 50 12% and 8 06% respectively at 1/2 ML; 74 50%, 47 14% and 7 77% respectively at 3/4 ML; 58 72%, 34 60% and 4 64% respectively at 4/4 ML. The nutritional value of HOC647 stalks harvested at 4/4 ML was, therefore, higher than that at 1/2 ML or 3/4 ML. The content of WSC, starch and EE of HOC647 stalks at 4/4 ML was not only much higher ( P <0 01) than that of CAU80 stalks harvested at 4/4 ML, but also higher ( P <0 05) than that of FC3 stalks harvested at 3/4 ML, whereas the content of cell wall components including NDF, ADF and lignin of HOC647 stalks was significantly lower ( P <0 001) than that of CAU80 and FC3, respectively. The stalks of HOC647 had higher ( P <0 01) in vitro DMD and NDFD, and ruminal gas production than those of CAU80 and FC3 stalks. These results suggested that HOC647 stalks at 4/4 ML of kernels are characterized by their high nutrient contents and being more ruminally digestible, and thus seem to be of highly valuable over other corn stalks.2|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：This paper introduces the stepwise regression analysis in view of the difficulties to quantitatively analyze the influencing factors of the development of agricultural mechanization. Referring to the data in 2002 of 115 counties (cities) in Shanxi province, this paper set up the stepwise regression model of influencing factors of development level of agriculture mechanization of Shanxi province. As the analyzing result of the model shows, there are 7 main factors to influence the development level of agriculture mechanization of Shanxi province. In accordance with their influence, they are arranged successively as total motive force of agricultural machinery of each hectare, per capita gross domestic product, proportion of mountain and hill, per capita net income of farmers, agricultural machinery initial value of each hectare, proportion of agricultural workforce and frost free period. Thus the key to improve the agriculture mechanization level is to strengthen the motive force of agricultural machinery. Meanwhile, the national economy and so on should be attached importance to.2|7|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In order to fully understand inequality of the income of rural population and the major influencing factors, this paper examined the overall situation of inequality of the income of rural population in Liaoning Province by using two indexes including concentration index and Theil index. With regard to measurement of the inequality of the income of rural population, the study was focused on inequality decomposition by factor components such as analysis of sources of income and the inequality of the income of population subgroups within a region and between regions, The essential issue of the inequality of income was revealed based on examination of micro-situation of the inequality of income. It comes to a conclusion according to the above analysis. Policy implications are suggested by this study.Key words farmers; inequality of income; -lheil indexKeywords：farmers,inequality of income,Theil index,0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In order to research hedging performance of China's hard wheat and soybean futures market, this article will make use of ordinary least squares, bivariate vector autoregression, error correction mechanism and error correction generalized autoregressive conditional heteroscedasticity four hedging models and measurement index to empirically research the hedging ratio and performance of the two futures market. The results of research suggest the four week's best hedging ratio of hard wheat and soybean futures exceed those of week and two weeks' , which separately is 0 28 and 0 48, and the four week's performance of hard wheat and soybean futures separately is 10 27 and 18 85, which exceed those of week and two weeks'. The hedging ratio and performance of China's soybean futures market is superior to these of hard wheat futures market. From the four models, the hedging ratio and performance of ECM and EC GARCH excel those of OLS and B VAR, out of sample's hedging performance is superior to inner sample's. With carrying on remission of agricultural tax and other rural, agriculture and farmer policies, China's farm product futures market will bring into play the better hedging function, and will play a more important role in our country economy.8|5|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
