Analysis on the Main Barriers of Sustainable Development of Agriculture in Lanzhou——And Discussion to the Multi-functionality of Agriculture

Sustainable development of agriculture is the agriculture development pattern that is based on ecology,economic and society,and it is closely connected with the multi-functionality of agriculture: Realizing the multi-functionality of agriculture is dependent on the support of technology system and policy system of sustainable agriculture,and the implementation of sustainable agriculture finally aims at realizing the coordinated development of production,economic,environment,society of agriculture and its other functions.It is thus obvious that sustainable development of agriculture is the requirement of realizing the multi-functionality of agriculture,and the multi-functionality of agriculture is the target of sustainable development of agriculture.Therefore,it is extremely important to get a clear understanding of the main barriers of sustainable development of agriculture.The article comes from the perspective of multi-functionality of agriculture,and combines the reality of Lanzhou city's agricultural development,and establishes the index system of barriers about sustainable development of agriculture in Lanzhou,and uses the principal component analysis to find out the main barriers which affect sustainable development of agriculture in Lanzhou city: the contribution rate of per capita agricultural income in rural area,per capita gardens and green area,green area rate,the proportion of agricultural labor in rural labor force,the effective irrigated rate of farmland and the Engel coefficient of rural area.