水土保持研究2012，Vol.19Issue(3)：254-258,5.
科尔沁沙地植被覆盖变化及其与气候因子的关系研究
Research for Vegetation Cover Change of Horqin Sandy Land and its Relationship with the Climate Factors
摘要
Abstract
The ecological system of drought and semi-arid region area is vulnerable, and the variation of vegetation cover is obious, it is particularly important to provide a theoretical basis for combating desertification through explica ting the vegetation cover pattern of desertification area and determining its variability of spatial-temporal and the rela- tionship with climate factors. In this study, Horqin sandy land of the typical desertification in the north China was taken as study area, and soil regulate vegetation index （SAVI） was extract by using the resolution imaging spectrum radiometer （Moderate Resolution Imaging Spectroradiometer, MODIS） surface reflectivity product data, the variability of spatial-temporal of SAVI in the study area was analyzed through the information entropy theory. The relationship between the change of the vegetation cover and the climate factors was further clear by performing the correlation analysis. As a whole, growth situation of vegetation in the east of the study area was better than that in the western region, and growth situation of vegetation in the south was better than that north. The spatial-temporal variability of vegetation pattern was the largest in 2000 and was the least in 2005; and it was the largest in southwest instead of southeast on the spacial scale. Precipitation and temperatures were positively correlated with SAVI, and precipitation had the larger effect on SAVI.关键词
科尔沁沙地/SAVI/气候因子/信息熵/时空变异Key words
Horqin sandy land/SAVI/climate factors/information entropy/spatial-temporal variability分类
农业科技引用本文复制引用
魏丰良,刘廷玺,张圣微,丁磊,崔德新,赵泽峰..科尔沁沙地植被覆盖变化及其与气候因子的关系研究[J].水土保持研究,2012,19(3):254-258,5.基金项目
国家自然科学基金重点项目 （）
内蒙古自治区自然科学基金 （）
科技部围际科技合作项目 （）
