农用地自然质量分等与耕地地力评级结果的对比衔接

Comparing and Linking the Gradation of Farmland Natural Quality and the Classification of Cultivated Land Fertility

研究目的:探寻农用地自然质量分等和耕地地力评级结果间的差异与联系.实现其成果的衔接研究方法:模糊综合指数评判法、聚类分析法、层次分析法、GIS叠加分析法、转移矩阵分析、拟合分析。研究结果:(1)农用地自然质量分等和耕地地力评价结果之间"等"、"级"变化差异程度不同,同一评价单元农用地自然质量等较多高于耕地地力评价级;(2)平原区"等"与"级"结果的差异程度远大于丘陵区;(3)建立了不同指标区农用地自然质量指数与耕地地力评价指数之间的衔接模型,丘陵区衔接模型的线性相关程度明显高于平原区。研究结论:利用衔接模型,可以在农用地自然质量分等和耕地地力评级结果间进行转换,实现了两者在同一指标区的相互衔接检验和不同指标区之间的统一可比性。

The purpose of this paper is to analyze the differences and relations between the results of farmland natural quality gradation and cultivated land fertility classification in order to realize the linkage of the results. Methods employed include fuzzy index evaluation, cluster analysis, AHP, GIS overlay analysis, transition matrix analysis and fitting analysis. The results indicate： （1）the variations are different between the resuhs of farmland natural quality gradation and cultivated land fertility classification; mostly the ＂grade＂ of farmland natural quality is higher than the ＂class＂ of cultivated land fertility in the same area; （2）the differences between ＂grade＂ and ＂class＂ in plain areas are more obvious than those in hilly areas; （3）a model linking farmland natural quality and cultivated land fertility was established, and based on the model it has been found that the linear correlation degree in hilly areas was obviously higher than that in plain areas. It is concluded that results of farmland natural quality grading and cultivated land fertility classification can be converted via the linkage model, thus the linkage of ＂grades＂ and ＂classes＂ in the same area and their comparability between different areas can be realized.