四川省县域耕地空间分布与变化研究

A Study of Cultivated Land Spatial Distribution and Changes in Sichuan Province

文章借助空间自相关和重心曲线对四川省2000—2012年耕地空间分布与变化进行研究。研究表明:四川省耕地分布的全域空间自相关较强,耕地分布具有较显著的聚集特征。2000—2012年,研究区耕地分布具有局域空间自相关,2000年包括成都平原在内的高-高类型区和甘孜州、阿坝州和凉山州等地区在内的低-低类型区,不存在异质性;2006—2012年,耕地分布的异质性凸显,出现低-高类型,新的异质区域主要出现在成都的都江堰市和龙泉驿区。2000—2012年,研究区耕地分布重心向东南方向移动,13年间耕地重心一共移动了6.3844km,与四川省域范围相比,偏移距离较小,表明四川省耕地集中分布于成都平原区,且近几年耕保政策成效明显。

With the help of spatial autocorrelation model and gravity center model,this paper analyzed cultivated land spatial distribution and changes in 2000-2012 in Sichuan Province. The research demonstrates that the level of global spatial autocorrelation of cultivated land in Sichuan Province is high, and distribution of cultivated land is aggregate. Cultivated land distribution and changes present the spatial autocorrelation phenomenon from 2000 to 2012;in 2000,spatial autocorrelation pattern distributed in which Chengdu Plain is in High-High area and Ganzi,Aba and Liangshan Prefectures in Low-Low area without beterogeneity;it leads to the diversification spatial autocorrelation pattern where Low-High area includes Dujiangyan city and Longquanyi District from 2006 to 2012. Compared with 2000,the center of cultivated land has been moved 6.3844 km along the track of Southeast in 2012;the short distance indicates that the protection of cultivated land has become apparent in recent years in Sichuan Province.