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中文摘要：
本文基于参与式农户问卷调查，对陕西省安塞县两个小流域内典型的农户系统，采用组分优势度、结构优势度和复合生态系统稳定性指数进行了定量评价。结果表明：随着农户家庭经营内容的增多和产业链的延长，农户系统的稳定性趋予增强。同时，分析发现受退耕还林补贴政策的影响，在国家停止补贴以后，两个小流域农业生态系统的结构均衡性和稳定性都有不同程度的降低，而对大南沟小流域农户的影响更显著。
英文摘要：
Based on the investigation and analysis of different farmer in two small catchments of Ansai County, Shaanxi Province,the structure of different agro ecosystem was quantitatively evaluated by using the dominance and stability indexes of complex system. Results indicated that the stability of farmer system was getting better with increment of income source and diversification of management. At a certain degree,Grain-for Green Programme would affect the dominance and the stability of household agro-ecosystems in the two small catchments. However,impact of Grain-for Green Programme on Danangou farmers would be more significant because of the simple structure of household ecosystems and strong dependence on Grain-for Green Programme.
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