水土保持研究2011，Vol.18Issue(4)：189-191,196,4.
农牧交错区天然草地植被的波动
Fluctuation of Vegetation in Natural Grassland of Farming-pastoral Ecotone
摘要
Abstract
In order to provide reference method for desertification evaluation of northern farming-pastoral ecotone,this paper chose natural grassland vegetation in Yanchi,Ningxia as the research site,vegetation characteristic value（including coverage,community height,density and biomass） during 2003-2009 was investigated by using the method of expert weighting.Fluctuation intensity formula was built in order to analyze vegetation changes of northern farming-pastoral ecotone.The results showed that the biggest positive fluctuation intensity was 1.52 in 2004,which was the best vegetation growth year during study period,while the maximum of negative fluctuation intensity was-1.76 in 2008,meaning the worst vegetation growth year during study period.Meanwhile,combined early rainfall data,it was found that the curve of vegetation fluctuation intensity and the curve of rainfall were basically the same,and it showed the curve of vegetation fluctuation intensity could indeed reflect the vegetation growth in this site.And assuring weight of vegetation fluctuation intensity formula need to further study and discuss.关键词
农牧交错区/特征值/波动强度/降雨量/权重Key words
farming-pastoral ecotone/characteristic value/fluctuation intensity/rainfall/weight分类
农业科技引用本文复制引用
程中秋,张克斌,常进,王黎黎,王晓,张宾宾,周毅..农牧交错区天然草地植被的波动[J].水土保持研究,2011,18(4):189-191,196,4.基金项目
国家自然科学基金项目 （）
国家林业局宁夏盐池荒漠化定位监测项目 （）
