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[1]CHENG Zhong-qiu,ZHANG Ke-bin,CHANG Jin,et al.Fluctuation of Vegetation in Natural Grassland of Farming-pastoral Ecotone[J].Research of Soil and Water Conservation,2011,18(04):189-191,196.

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Fluctuation of Vegetation in Natural Grassland of Farming-pastoral Ecotone

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 18 Number of periods: 2011 04 Page number: 189-191,196 Column: Public date: 2011-08-20

Title:: Fluctuation of Vegetation in Natural Grassland of Farming-pastoral Ecotone

Author(s):: CHENG Zhong-qiu, ZHANG Ke-bin, CHANG Jin, WANG Li-li, WANG Xiao, ZHANG Bin-bin, ZHOU Yi; Beijing Forestry University, Beijing 100083, China

Keywords:: farming-pastoral ecotone; characteristic value; fluctuation intensity; rainfall; weight

CLC:: S812

DOI:: -

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.

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