江苏省新沂市耕地的产能空间分异与保护分区

Cultivated Land in Xinyi of Jiangsu: Spatial Differentiation of Productivity and Protection Zoning

本研究在对新沂市耕地产能进行评价的基础上结合空间自相关性等方法,对新沂市耕地产能的空间分布格局进行分析,并提出耕地保护分区方法。结果表明:(1)从气候、自然因素及技术水平出发的耕地产能体系对于耕地综合产出及效果评定具有适用性;(2)新沂市耕地产能呈现明显的区域差异,具有较强的空间正自相关性,且正相关类型(HH型和LL型)多以组团形式出现,负相关类型(LH型和HL型)则分布零散;(3)空间分异特征与空间尺度密切相关,大尺度下的局部空间自相关分异程度较小,但不同尺度下的空间自相关性的分布格局具有趋同性;(4)结合不同尺度下的空间局部自相关分析,提出耕地保护分区,以期为研究区域的耕地保护提供参考。

Based on the evaluation of the cultivated land productivity in Xinyi,we analyzed the spatial distribution pattern of cultivated land productivity in Xinyi combined with the spatial autocorrelation method,and proposed the protection zoning method of cultivated land.The results showed that:(1)the cultivated land productivity system from the aspects of climatic,natural factors and technical level had the applicability to the comprehensive output and effect evaluation of cultivated land;(2)the cultivated land productivity in Xinyi showed obvious regional differences,with strong spatial positive autocorrelation,and the positive correlation types(HH type and LL type)appeared in groups,the negative correlation types(LH type and HL type)were scattered;(3)the spatial differentiation characteristics were closely related to the spatial scale;the local spatial autocorrelation differentiation at large scales was small,but the spatial autocorrelation distribution patterns at different scales had similarities;(4)combined with spatial autocorrelation analysis at different scales,we proposed the cultivated land protection zoning to provide reference for the cultivated land protection in the study area.