基于气候因子修正的农用地集约利用评价研究

将气候因子纳入农用地集约利用评价过程, 重新界定了农用地集约利用的内涵, 并提出了 “农用地集约利用系数”, 通过 “相对复种指数”和 “相对粮食总产量”两个新的概念计算了 1995?2005 年我国农用地集约利用系数,以期在统筹兼顾社会经济因素和 自然因素的基础上, 综合考虑气候因素对农用地集约利用评价过程的影响。采用相关研究成果对评价方法进行了验证, 评价结果与我 国实际情况比较吻合。结果表明, 该方法可合理评价各地在现有 自然条件下的农用地集约利用现状和潜力, 为因地制宜提高我 国农用地集约利用水平提供理论依据。此外, 基于 VB + MO 并允许调用 ArcGIS相关分析模块, 从底层构建了评价系统, 为各地农用地集约利用评价提供了可操作平台。

Evaluation of Agricultural Land Intensive Use Based on the Modification of Agro-climatic Factors

To reflect the situation and potential of agricultural land intensive use more definitely, the concept of agricultural land intensive use is redefined and the coefficient of agricultural land intensive use is raised. On the basis of the aforementioned definition, the two indices, relative multi-cropping index and relative grain yield per square kilometer (unit: kg/ hm²) are applied to take place of the previous ones, multi-cropping index and grain yield per square kilometer respectively. In addition, entropy method is used to fix the weight of each index. Via comparison of the conclusions with that of other studies concerned, the results are verified and the coefficient of agricultural land intensive use is justified, which means the method builds a theoretical basis for the evaluation of the status and potential of agricultural land intensive use to take actions that suit local circumstances. An evaluation system is developed on the basis of the programming language, VB + MO, and some modules of ArcGIS, which can act as an useful platform for the assessment of agricultural land intensive use.