| In order to curb the dust from the earth surface and prevent sand and dust weather, the Ministry of Agriculture implements the no-tillage to combat desertification in Beijing and its surrounding areas. No-tillage is a measure of conservation tillage, it means that the former residue is used for surface coverage, Gapping a narrow slot (groove), channel or band for direct seeding with the no-tillage machine in the no-plowing soil. Cultivation will be reduced to guarantee Germination and weeds and pests be controlled by pesticides. The practice and research of no-tillage in foreign countries are relatively mature, which lay a good foundation for the implementation of no-tillage and evaluation of economic and environmental effectiveness. The research of no-tillage focused on three aspects, including the techniques, economic and environmental effects. Although the no-tillage study in China has a certain history, the practice has not been widely disseminated. The main reason lies in the mechanism of nutrient transfer and the use of water etc for the practice of no-tillage in the different regions is not deep enough understanding, Especially it has yet to be further defined on the aspects of the impact on crop yield and economic income by no-tillage. In order to mate with implementation and spread of the measures of no-tillage in Beijing, This study was carried out on-the-spot investigations in rural areas, as well as inquiries of Beijing scientific research institutes and government organizations, and using the data from the no-tillage experiment sections or areas, systematic study the differences between the measures of no-tillage and conventional tillage by the method of input-output analysis and driving the area with the point, As the same time, Under no-tillage practices step, the changes of the grain output and input-output will be predicted after no-tillage is implemented in Beijing. The main conclusions were as follows:1) As far grain output as, no-tillage is more than conventional tillage, the average increase yield of winter wheat is 238.47kg/ha, the average increase yield of summer maize is 846.2 kg/ha, the average increase yield of spring maize is 741.67 kg/ha.2) As far economic benefits as, winter wheat yield will rise by an annual 616,400kg and maize yield will rise by an annual 27,452,900 compared with conventional tillage after full implementation of no-tillage in this region, which total yield will increase more than 28.06 million kg. As for the differences of the energy, the water and electricity, tools, grain yield, no-tillage will enhance economic efficiency. Compared with traditional farming, the full implementation of no-tillage, the region will reduce an annual 54.9 million yuan input, more than 100 million yuan economic benefits will be increased. Efficiency ratio of no-tillage and conventional tillage is 1.42:1.3) From the predicted added value of economic benefits of the every country in Beijing for the next five years, grain economic efficiency has great relation with the implementation of no-tillage. The districts wherever conservation tillage promote better, is also a relatively rapid economic growth, an average economic growth rate is more the 20‰.4) There are six major issues in the implementation of no-tillage that should take measures to ensure the promotion of innovation and sustainability of no-tillage, such as improvement of the no-tillage farming techniques and promotion of the innovation system.This study not only systematic answers the problem of the input-output and cost-effectiveness of the no-tillage practice in Beijing, but also integrates space and time with economic analysis result through the full use of theory and method of quantitative economy and spatial analytic software, which is Theoretical and methodological innovation. Its findings will not only be helpful to implement and promote no-tillage in Beijing and the whole country, but enriched and perfected tillage and provide a theoretical basis for the reform of the agricultural production system.
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