长江流域棉花种植面积变化遥感监测--以安庆市和池州市为例

决定棉花产量的关键因素之一是棉花的种植面积,适时准确地掌握棉花的种植面积对于科学指导棉花生产具有十分重要的意义.文章以安庆市、池州市为例,系统地介绍了在棉花种植面积遥感监测过程中,通过土地利用背景数据库建设,以及基于背景数据的棉花种植面积遥感解译,准确地监测了棉花种植面积及其变化率.结果显示长江流域棉花主要集中分布于沿江的洲圩区,其次分布于沿江的岗地和丘陵;在2001～2002年度,棉花种植面积变化主要是减少,在2002～2003年度,棉花种植面积变化主要是增加.究其变化的原因,主要受棉花市场价格和气候条件的影响.

Monitoring of the change of cotton plantation area in the Changjiang valley by remote sensing-Taking Anqing City and Chizhou City as examples

Since the plantation area plays a decisive role in the cotton yield, possessing information about cotton plantation area accurately and timely is very important for guiding cotton agriculture.The paper takes Anqing City and Chizhou City as examples to introduce the procedure of monitoring cotton plantation area by remote sensing,and the area of cotton and its rate of change are monitored accurately by adopting such technology as interpreting and investigating. The monitoring result shows that cotton in the Changjiang valley is mostly distributed in fields surrounded by dams and secondly in hillocks and foothills. The result also shows that between 2001 and 2002, the change rate of cotton plantation area is negative, but between 2002 and 2003, the change rate of cotton plantation area is positive.The main causes of change are industrial structure adjustment, price and climate.