基于NDVI时间序列数据的江西省水稻种植制度变化研究

利用Savitzky-Golay滤波对覆盖江西省范围的SPOT VGT NDVI时间序列数据进行平滑处理的基础上,结合坡度数据,通过非监督分类的方法提取了江西省2000、2005和2010年水稻种植范围,并根据NDVI的年内动态变化,从水稻种植范围、水稻生长季起始时间、水稻复种指数和NDVI最大振幅等分析了江西省水稻种植和生长情况,探讨2000~2010年江西省水稻生产的变化。

Study on Rice Cropping System in Jiangxi Province with Time-series NDVI Dataset

Multiple cropping system is an important way to improve the grain yield , and cropping index as a statistical indicator can re-flect the degree of utilization of the arable land in the time scale .Cropping index of remote sensing monitoring on arable land resource assessment, security of food production , agricultural condition prediction has important practical significance .Jiangxi has always been a big agricultural province , has never been interrupted the export of marketable grain since the founding of state , made an important contribution to national food security .In this case, Jiangxi Province ,as the object of study , using SPOT VGT multi-temporal NDVI data, combined with the SRTM DEM data , remote sensing interpretation of the 2000-2010 three years’ arable land data in a five-year interval , analyze the change of the cultivated land area , crop growth situation , and farming system in Jiangxi province in these three years and the influence factors .