福建省耕地压力时空差异分析

根据最小人均耕地面积及耕地压力指数模型,分析了福建省耕地压力的时空变化规律及成因,研究结果显示:(1)由于耕地面积呈减少趋势、人口不断增多,在粮食自给率下降的情况下,1996～2009年福建省耕地压力指数呈略微上升趋势;(2)全省耕地压力地区差异显著,闽东南沿海普遍高于闽西北山区,根据耕地压力指数偏离1的程度,将全省分为4类区,包括耕地压力严重区、耕地压力明显区、耕地压力预警区、耕地压力不明显区;(3)总体上,闽东南沿海耕地压力增长速度较快,闽西北山区则较慢。根据K值增幅大小,将全省划分为4类区,包括急速增长区、快速增长区、相对缓慢增长区、基本稳定区.

Analysis of Temporal and Spatial Pressure Index of Cultivated Land in Fujian Province

Based on the model of the per capita minimal area of cultivated land and the pressure index of cultivated land,this paper analyzed the temporal and spatial distribution characteristics of pressure index of cultivated land in Fujian Province using GIS.Results showed that the pressure index of cultivated land was on the rise in the case of decline in food self-sufficiency rate,reduction of cultivated land and growing population between 1996 and 2009.The pressure index of cultivated land was different obviously among different regions.On the whole,it was generally higher in south-east coastal areas of Fujian Province than in the northwest mountainous areas.The province’s area was divided into four categories according to pressure index of cultivated land,including serious area,significant area,warning area,and not obvious area.Generally,pressure index of cultivated land creased more quickly in south-east coastal areas than in the northwest mountainous areas.The province’s area was divided into four categories according to increase amplitude of pressure index of cultivated land,including rapid growth area,fast growth area,relatively slow growth area,and basically stable area.