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中文摘要：
在分析耕地资源生态安全内涵、特征和影响因素的基础上，构建了耕地资源生态安全评价指标体系，通过对我国耕地资源生态安全的动态变化分析，发现改革开放以来耕地资源生态安全程度呈先增后减的变化趋势，安全综合值先从1981年的0．8918上升到1990年的0．9410，随后又下降到2004年的0．6390。从2004年各省份的安全程度来看，安全状况差异非常明显，且经济发达省份的安全水平通常低于经济相对落后省份；通过障碍因素分析发现，改革开放前期的障碍因素主要是农民人均纯收入、财政支农等社会经济因素，中后期则转变为农药施用量、氮肥所占的比重等直接和间接影响因素，在各省份障碍因素中，单位耕地面积农药施用量、氮肥所占的比重、农村人均纯收入、耕地资源生态安全保护意识是最主要因素，经济发达省份障碍因素主要集中在直接和间接影响因素中，而经济相对落后省份则集中在社会经济因素。出台耕地资源生态安全保护法规和分区保护政策有助于提高我国耕地资源生态安全状况。
英文摘要：
Based on the analysis of connotation, characters and factors influencing ecological security of cultivated land resources, the paper sets up indexes for assessing the security. Through the analysis of changes in ecological security of cultivated land resources, it is found that the level of security arose initially and then declined since the introduction of reforming policy, with the composition value increased from 0. 891 8 in 1981 to 0. 941 0 in 1990,and then decreased to 0. 639 0 in 2004. From the view of security level in different provinces in 2004,the difference between provinces is very obvious,and the security level of developed provinces is higher than that of developing provinces. The factors influencing the security are farmer per captia net income and fund of agricultural support etc at the beginning of the reforming policy introduction. Some other factors may have direct and/or indirect influence, such as pesticides and ratio of nitrogenous fertilizer. The application of pesticides, ratio of nitrogenous fertilizer, farmer per captia net income and consciousness of ecological security are main factors of obstacles in different provinces. The factors in developed provinces are those with direct and/or indirect influence, and the factors in developing provinces with social and economic influence. It is proposed that the constitution of protective laws and regional policies may improve the ecological security of cultivated land resources.
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