长江中下游地区冬闲田地理分布数据

Dataset of winter fallow land in middle and lower reaches of Yangtze River(2007-2008)

近20年以来,随着中国经济结构的调整和农村劳动力的转移,部分地区冬闲田的面积呈明显增长态势。长江中下游地区冬闲田地理分布数据(WFL_MLYR)是利用长时间序列SPOT NDVI数据,结合研究区耕地空间分布和农作物在出苗期和成熟期NDVI变化特征,基于NDVI动态阈值法提取的。该数据包括长江中下游地区2007年农作物收获时间、2008年农作物播种时间以及2007-2008年冬闲田闲置时间。该数据是掌握中国区域农业生产活动状况,挖掘农业生产潜力,科学、合理及高效利用冬闲田资源,保证农业可持续发展的重要参考数据和基础性数据。

The winter fallow land is significant to agriculture in Yangtze River,because it could be used to increase the grain yield.The information included in the dataset of winter fallow land in middle and lower reaches of Yangtze River(WFL_MLYR)is helpful for understanding agriculture production condition,exploring agriculture production potential and keeping agriculture development sustainable.The dynamic threshold method based on time series MODIS NDVI is an useful practical method to extract spatial information of winter fallow land.The WFL_MLYR are spatial data of winter fallow land from 2007 to 2008 with a 1km spatial resolution.It includes the data on mature date,sowing date and winter fallow fields.The extraction data were compared with the actual result from agricultural meteorological observation station.The accuracy of mature date is more than 91%,and that of sowing date is 86%approximately.