粤北山区耕地后备资源宜耕性的空间分异特征

Suitability assessment and spatial differentiation of cultivated land reserve in the mountainous areas of northern Guangdong province

为了合理开发利用耕地后备资源,文章以广东省粤北山区可开垦土地和可复垦采矿用地为评价对象,从生态、气象水利、土壤理化和区位等4个因素11个指标构建耕地后备资源评价指标体系,采取限制性因子法与变异系数法对耕地后备资源进行宜耕性空间分异特征研究.主要结果:3.009 8万hm^2宜耕土地面积中,可开垦土地、可复垦采矿用地面积分别为29 651.50 hm^2和446.37 hm^2;宜耕土地来源多样,土地面积悬殊较大;空间分异特征明显,不同地区、不同类型宜耕土地空间分布差异较大.耕地后备资源开发仍然可为补充建设占用耕地的重要途径.

For national development and land reclamation utilization,this paper takes the cultivated land resources in the mountain areas of northern Guangdong province as the assessment subject,adopts 11 evaluation indices from aspects of ecology,water conservation,soil&meteorological factors,and studies the spatial distribution of suitable tillage reservations by restrictive factor method and variation coefficient method.The main results are as follows:among the 30.098 thousand hectares of arable land,reclaimable land and reclaimable mining land are 29.651 50 thousand,446.37 hectares respectively;the land suitable for arability is diverse in types and rich in expansion;the spatial distribution characteristics are obvious,though with great disparity in location and composition;the cultivation of reserved land resources can still be an important supplement to agricultural development and construction occupation.