基于循环经济视角的河南省耕地利用集约度时空差异研究

提高耕地集约利用水平是保障我国粮食安全的重要途径。以粮食大省——河南省为样区,基于循环经济理念构建包含投入强度、重复利用、综合效益、持续状态等4个准则层的耕地集约利用评价指标体系,采用熵值法、变异系数法、协调度评价模型等方法对1994~2012年河南省耕地利用集约度进行时间序列评价,采用聚类分析法分析河南省耕地集约利用水平的空间差异特征,为河南省粮食安全和耕地集约节约利用提供依据。结果表明:(1)1994~2012年间,河南省耕地利用集约度总体呈上升趋势,但2003年下降。(2)耕地投入强度、重复利用、综合效益、持续状态呈增长态势。但耕地持续状态增长较为波动。(3)河南省耕地利用协调度比较协调,总体处于平稳波动状态,1994~2002年耕地利用协调度呈波动上升趋势,2002~2012年呈波动下降趋势。(4)1994~2012年河南省各地级市耕地集约利用水平呈上升趋势,并且具有明显的区域性差异。河南省西部地区耕地集约利用水平相对较低。

TEMPORAL AND SPATIAL VARIATION OF CULTIVATED LAND USE INTENSITY IN HENAN PROVINCE BASED ON THE PERSPECTIVE OF CIRCULAR ECONOMY

The cultivated land resource is an important guarantee for the national food security. Based on the concept of circular economy, this paper constructed an evaluation index system for intensive cultivated land use including input intensity, reuse, comprehensive benefit and continuous status, and evaluated the status of intensive cultivated land use in Henan province from 1994 to 2012 by using entropy method, variation coefficient method and Coordination Evaluation Model, and discussed the feature of spatial difference of various areas in Henan province by using cluster analysis method. The results showed that: (1)The intensive use of cultivated land in Henan province was in an increase trend from 1994~2012. (2) Cultivated land input intensity, reuse, comprehensive benefit, and continuous status all increased, but the land continuous status fluctuated more. (3)The cultivated land use was coordinated, which showed a trend of fluctuations rise and falling volatility trend 2002~2012. (4) The level of intensive cultivated land use increased in each prefecture of Henan province, and had obvious regional differences from 1994~2012, but the level of intensive use of arable land in western areas was lower.