农牧交错区土地荒漠化与生物多样性研究.pdf

_______________________________________________________________________________

农牧交错区土地荒漠化与生物多样性研究
——以宁夏盐池县为例

侯瑞萍张克斌乔峰李瑞杨俊杰
(北京林业大学水土保持学院,100083,北京)

摘要: 采用α-多样性指数即 Shannon-Wiener 指数、Simpson 指数、群落均匀度指数 Jsw 和 Js 和β-多
样性指数(相似性系数 Cs)研究宁夏盐池县草原群落在不同荒漠化治理措施(人工封育、退耕还林、撂
荒地)固定样地植物多样性变化。对比 2002 和 2003 年不同类型固定样地植物多样性观测数据表明:到
2003 年,各实验样地的α-多样性指数均有不同程度的提高。β-多样性的研究结果同样表明:在不同治
理措施实验样地的种类组成已经发生了一定的变化。此外,本文还进一步分析了引起植物多样性变化的主
要原因。
关键词: 农牧交错带盐池定位监测植物多样性

Study on Biodiversity and Desertification in the Ecotone of Agriculture-animal Husbandry
-taking Yanchi County in Ningxia Hui Autonomous Region as example

Hou Rui-ping Zhang Kebin Qiao Feng Li Rui
(Soil and Water Conservation College, Beijing Forestry University, Beijing 100083 China)


Abstract: The plant diversity of grassland under the different desertification controlling measures (by converting
cropland to forests, closing and fencing and discontinuing farming and letting go out of cultivation ) in Yanchi
County, Ningxia Hui Autonomous Region was measured by using the method of α-diversity index (including
Shannon-Wiener index, Simpson index, community evenness index Jsw and Js ) and β-diversity index
(measured by similarity coefficients). Compared with the different fixed sample plot observation data in 2002
and 2003, the results showed that α-diversity of experimented plots increase