摘要
以宁夏盐池封育区为研究对象,调查了2003年-2007年植被的植物种数、盖度、密度和生物量。在生态学和统计学基础上,采用专家权重法,构建植被波动强度计算公式来分析植被数量波动强度。结果表明:正向波动最大的是2003年,波动强度为0.622,是研究时间内植被生长状况最好的一年。负向波动最大的是2006年,波动强度为-0.472,是研究时间内植被生长状况最差的一年。
The fenced region in Yanchi County,Ningxia was chosen as study area,the plants number 、cover-age、density and biomass between 2003 to 2007 were investigated.Using the method of expert weighting,fluctu-ation intensity formula was built to study vegetation fluctuation intensity.The results showed that the biggest posi-tive fluctuation intensity was 0.622 in 2003,which was the best vegetation growth year during study period.While the maximum of negative fluctuation intensity was-0.472 in 2006,meaning the worst vegetation growth year during study period.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2010年第8期154-157,共4页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金项目"半荒漠地区湿地植被群落时空分布特征研究"(30771764)
国家林业局宁夏盐池荒漠化定位监测项目(660550)资助
关键词
盐池
封育
植被
波动
Yanchi County
fenced region
vegetation
fluctuation
