Extracting Winter Wheat Planting Area Based on Cropping System with Remote Sensing
Winter wheat is one kind of important crop in China. Its planting area is one key element to explain yield change. To obtain winter wheat planting area as soon as possible can provide scientific reference for our countrys making related policy. Basing on the cropping system in Shandong province, winter wheat is divided into two kinds winter wheat sowed by machine-maize and people broadcast winter wheatrice. Using MODIS data, NDVI characters of winter wheat, garlic, greenhouse vegetable, from sowing till overwintering stage were analyzed. Together with NDVI characters of former stubble crops in middle September, extracting requirements were set up for winter wheat planting area which was sowed by machine this year. In view of the spectrum similarity between rice wheat and greenhouse vegetable from sowing stage till overwintering stage, rice wheat planting area of former year was extracted relying on the character of biomass rapid growth at jointing stage. Because of the people broadcast winter wheat-rice cropping system is very fixed in Shandong province, then the rice wheat planting area of former year can take the place of the rice wheat planting area this year. Two kinds of winter wheat area were merged, and tested by 284 groups of located spots data, the accuracy reached 94.01％. The result showed that it is feasible to extract winter wheat area before overwintering stage, and the time is 4 months earlier than using jointing stage NDVI.
Shandong province winter wheat rice wheat area remote sensing
Xueyan Sui Xiaodong Zhang
Institute of Agriculture Sustainable Development/Shandong Academy of Agriculture Sciences, Jinan 250100, China
国际会议
南昌
英文
691-699
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）