摘要
通过对2005-2008年历年8月份归一化植被指数(NDVI)差值变化和5月上旬-7月中旬历旬降水量与牧草产量关系的综合分析,探讨了锡林郭勒草地植被变化特征及其形成的主要原因。结果表明:锡林郭勒草地大部地区各年度同期植被指数变化明显,植被指数差值增大的面积逐年增加,植被长势均好于前1年;3a草地植被指数差值减少的区域主要分布在中、东部地区,表明该地区草地植被退化明显。草地地表植被变化和牧草产量波动与6月下旬降水量显著相关。定期监测草地地表植被变化特征,可为科学决策提供依据。
Vegetation change and its causes were discussed through analyzing the relationship between herbage yield and the Normalized Difference Vegetation Index（NDVI） in August and precipitation in early May to middle July during 2005-2008.The results showed that NDVI changed significantly in most regions,the region with increasing NDVI extended,and vegetation grew better than last year.Regions with decreasing NDVI mainly distributed in middle and east of the Grassland,which indicated that herbage degradation was serious.Grassland vegetation changes and herbage yield fluctuation were significantly to precipitation in late June.
出处
《中国农业气象》
CSCD
2011年第3期417-422,共6页
Chinese Journal of Agrometeorology
基金
锡林郭勒盟气象局科技创新自选项目(200808)
关键词
遥感
草地
植被
变化
Remote sensing
Grassland
Vegetation
Change
作者简介
贺俊杰（1964-），内蒙古锡林浩特人，大学，高级工程师，主要从事生态与农业气象及大气边界层通量监测工作。E—mail：qxhjj@126．com
