重庆市耕地资源时空变化分析

Analyses of Temporal and Spatial Variation of Cultivated Land in Chongqing City

为多角度了解重庆耕地变化的趋势和特点,从时间、空间分布格局、空间形态、空间结构、空间功能等方面对重庆市耕地资源时空变化进行了较全面的分析。结果表明,近年来重庆市耕地总量和人均耕地面积总体上不断下降;空间分布上呈现出耕地资源稀疏区、一般区、密集区的格局;耕地重心向人地矛盾较为缓和的地区移动;耕地流失量由下降转为上升趋势;耕地增加量和耕地产出率均呈现上升态势。在此基础上,对重庆市耕地资源保护提出了一些建议以促进土地资源的可持续利用。

To understand the trends and characteristics of cultivated land changes in Chongqing city from different aspect, the temporal and spatial variation of cultivated land was analyzed comprehensively from time, spatial distribution, space form,space structure, space function and other aspects. The results showed that in recent years, the total amount of cultivated land and cultivated land areas per person in Chongqing city were both declining generally. The space was be divided into the cultivated land sparse area, the general area and concentrated area. The gravity center of cultivated land has moved to the regions where there were less conflict between human and land. The loss of cultivated land had a trend from decrease to increase. The increasing amount and output ratio of cultivated land showed a rising trend. Some advices on protecting resources of cultivated land were put forward to improve sustainable utilization in this area.