不同退耕态势下农地资源生态服务价值评估比较

Comparison of Ecosystem Services Value of Agricultural Land Resources under Different Retirement of Cultivated Situation

针对退耕态势差异较大的陕西省吴起县和米脂县在3个不同退耕阶段农地资源生态服务价值进行评估的基础上,分析了两个区域各阶段农地资源生态服务价值的变化,探讨了在不同退耕态势下退耕还林(草)工程的实施对两个区域农地资源生态服务价值的影响。结果表明:退耕前后两个区域农地资源直接经济价值分别增长了11576.46万元和3754.42万元,间接生态服务价值分别增加了107946.19万元和4624.11万元。两个区域在3个不同阶段直接经济产出价值与间接生态服务价值之比分别为1∶0.84,1∶2.63,1∶3.56和1∶0.41,1∶0.65,1∶0.56。

This paper based on assessing the ecosystem services value County in Shaanxi Province which two counties have large difference in stages of retirement of cultivated, analysed the changes of two regions at of agricultural land resources of Wuqi and Mizhi retirement of cultivated situation in three different each stage of ecosystem services values of the agricultural land resources, discussed the impact of the implementation of converting farmland to forest or grassland to the two regions ecosystem services value of agricultural land resources under different situations of the retirement of cuhivated. The results showed that retirement of cultivated makes the direct economic value of agricultural land resources increased by 115. 764 6 million yuan and 37. 544 2 million yuan respectively, the indirect value of ecosystem services increased by 10. 794 6 million yuan and 46. 241 1 million yuan. The ratio of direct and indirect economic output value ecosystem services of two regions in three different stages are 1：0.84,1：2.63,1：3.56 and 1：0.41,1：0.65,1：0.56.