1982-2003年中国草地生物量时空格局变化研究  

Variation in Spatial Pattern of Grassland Biomass in China from 1982 to 2003

作　　者：辛晓平[1,2] 张保辉[1,2] 李刚[1,2] 张宏斌[1,2] 陈宝瑞[1,2] 杨桂霞[1,2] 

机构地区：[1]农业部资源遥感与数字农业重点实验室,中国农业科学院资源区划所,北京100081 [2]呼伦贝尔草原生态系统国家野外科学观测研究站,中国农业科学院资源区划所,北京100081

出　　处：《自然资源学报》2009年第9期1582-1592,共11页Journal of Natural Resources

基　　金：国家重点基础研究发展计划项目(2007CB106806);863专题项目(2007AA10Z230);国家科技支撑计划项目(2006BAC01A12、2006BAC08B0404、2006BAD16B05-2)

摘　　要：论文结合草地生物量调查资料、对应时段NDVI数据，分析了1982-2003年不同时期我国草地生物量空间格局变化特征及其与气候变化的关系。结果表明：20世纪80年代初期到末期，全国大部分地区草地生物量增加或基本持平；80年代末期到90年代初，大面积范围内草地生物量降低，热性草丛、温性草甸草原、山地草甸、低地草甸下降幅度分别为10．86％、4．96％、4．86％、3．49％；90年代末期后，北方大部分地区草地生物量上升到80年代的水平，南方草地生物量略有上升；1982-2003年草原区平均气温上升0．6～1．5℃，降雨量减少23．3％，草地生物量变化与降水量变化有弱相关关系（相关系数0．29），与气温变化无关。In this paper, we used a simple regulated model to explore long term trends in China＇ s grassland biomass and its spatial and temporal pattern, using a time series data set for the Normalized Difference Vegetation Index （NDVI） for maximum growth season （July 15th to August 15th） from 1982 to 2003, together with ground truth biomass data during 1991 -1994 and 2002 -2003 and historical climate data. We found that grassland biomass increased in the mid 1980s and began to decrease after 1990. The country＇s grassland biomass decreased by 3.07% from 1988 to 1998, and that of tropical herbosa, temperate meadow steppe, temperate Montana meadow and lowland meadow decreased separately by 10. 86%, 4. 96%, 4. 86% and 3.49%, respectively. Grassland biomass increased to the same level as the 1980＇ s after 2000＇ s except in the Loess Plateau and southern China. Annual precipitation decreased 23.3 % and temperature increased 0. 6 - 1.5℃ from 1982 to 2003 in grassland area of China. The grassland biomass showed low correlation with precipitation （ correlation coefficient equaled to 0. 29 ） and no correlation with temperature. Grassland biomass in the Inner-Mongolia Plateau, southeastern Tibetan Plateau and mountainous area in central northern Xinjiang showed significant fluctuation. Key words：

关 键 词：草地生物量 时空格局 气候变化 

分 类 号：S812[农业科学—草业科学]