AGRICULTURAL ECO-BENEFIT EVALUATION ON LAND RESOURCES EXPLOITATION
土地资源开发的农业生态效益评价

Discusses the significance of eco-benefit evaluation of la nd resources exploitation and points out the purpose of it is to provide scienti fic basis for decisison-making of land resources exploitation. By means of eco -benefit evaluation, the eco-benefit of land resources exploitation can be distin ctively predicted with different modes of land exploitation. According to eco-pr inciple, the structure of land use should be regulated, the integrated benefit of agro-ecosystem can be enhanced. An eco-benefit evaluation index system is set up which includes three aspects: 1) the rationality index of ecosystem structure which reflects the interrelation, combination and rationality of tempo-spatial allocation of diverse elements in the agro-ecosystem; 2) ecosystem function inde xwhich weights the sustainable productive capacity of agro-ecosystem when land resources was used; and 3) environmental quality index which represents the chang ing and developing trend of agro-eco-environmental quality. The classification and synthesis evaluation method was adopted in the study. In the evaluating proce ss, the classicification evaluation was carried out first which was followed by synthesis evaluation. The method was used in the western part of Jilin Province and the evaluation index system was proved to be rationale, the evaluation metho d is simple and practicable, and the evaluation result accords with the fact.