重庆市万州区土地利用变化与粮食生产态势浅析

Food produce and land use change in Wanzhou District Chongqing city

探讨万州区1997￣2003年土地利用变化,尤其是耕地资源变化影响下该区粮食生产情况;运用Mapgis6.5对万州区土地利用结构与布局变化进行分析,应用Dps3.01逐步回归分析模块对耕地面积、粮食播种面积、粮食单产对粮食生产的影响进行分析;非农建设占用及生态退耕是导致万州区耕地数量和质量变化的主要因素;耕地面积与粮食总产量有一定的相关性,粮食播种面积与粮食总产量的相关性较强,而粮食单产与粮食总产量之间的相关性很强;根据万州区实际情况提出应通过建立耕地保护区,提高土地利用率和土地生产效率来保证粮食安全。

Probes into the influence on grain production on basis of analysis land use changes .Mapgis6.5 and Dps3.01 software are employed to analyze land use change and the influence of cultivated land area, grain planting area and grain per area output on grain production in Wanzhou district. The results are as following ： the main reason of cultivated land change are construction land taking up cultivated land and forest and grassland reusing cultivated land.;the relativity between cultivated land area and grain overall output is certain , the relativity between grain planting area and grain overall output is high , the relativity between grain per area output and grain overall output is higher . Based on conditions of Wanzhou, writer suggest through setting up the preserved zones of cultivated land and increasing the use efficiency and yield efficiency of land resources to assure cultivated land resource and food security.