摘要
利用线性倾向法和转移矩阵对过去三十年锡林郭勒草原植被NDVI指数的变化趋势进行分析的结果表明：1990~1999年是三十年中草原退化最为严重的时期,低指数区域（荒漠草原区）草原植被指数趋于提高,而部分高指数区域（植被指数最好的区域）却表现为降低趋势;2000年后锡林郭勒草原整体植被指数好转,载畜量的降低对草原植被恢复起到了积极作用,而降水量的变化对草原植被的影响程度在不同区域表现不一致。
The dynamic state of the NDVI index in Xilingol grassland was analyzed using linear trend and transition matrix.The results showed that the grasslands degraded mostly during 1990~1999,and that the vegetation in this area was restored after year of 2000.The NDVI index of the desert steppe where the index was smaller than others increased compared with 20 years before,while that of the best steppe decreased continually.The increasing NDVI index in Xilingol grassland had a negative correlation with livestock number in this area（P〈0.05）,which indicated that the policy of decreasing livestock for grassland protection has made achievements in Xilingol.On the contrary,the effect of annual precipitation on NDVI index was not identical in different area.
出处
《中国草地学报》
CSCD
北大核心
2014年第6期23-28,共6页
Chinese Journal of Grassland
基金
内蒙古自然科学基金项目(2014BS0709)
中央公益性科研院所基本科研业务费项目(1610332013013)
关键词
植被指数
草原退化
锡林郭勒草原
NDVI index
Grassland degradation
Xilingol grassland
