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《畜牧与饲料科学(英文版)》 2010-04
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Effects of Grassland Caterpillars on Plant Community Structure of Alpine Kobresia Meadows and Soil Properties

YU Jian-long1,SHI Hong-xiao2* 1.College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730016,China;2.Grassland Research Institute,Chinese Academy of Agriculture Science,Hohhot 010000,China  
[Objective] To investigate the relationship between the grassland caterpillar with different grades and the structure of alpine Kobresia meadow or soil feature.[Method] A total of 10 plots(20.00 m × 20.00 m) were chosen.In each plot,five smaller plots(5.00 m × 5.00 m) were randomly selected and six sample plots(0.25 m × 0.25 m) were then selected in each smaller plot.The biomass,vegetation height,grass-layer thickness,bare land area,soil moisture and total vegetation cover degree were determined.Data were analyzed statistically by Excel 2003 and SPSS 13.0 software.[Result] There was a significant difference(P 0.05) between the grassland caterpillars at different hazard grades and the structure of alpine Kobresia meadow or soil properties.[Conclusion] With the increase of grassland caterpillar density,the plant community structure of alpine Kobresia meadows changes from sedge family-dominant community to the forbs-dominant community.
【Fund】: funded by the grants from Basic Science and Research Special Fund for the State Level and Public Scientific Research Institute (Grassland Research Institute Chinese Academy of Agricultural Sciences) and Wild Science Observation Testing Station of Alpine Meadow Grassland Resource and Ecotope of the Ministry of Agriculture
【CateGory Index】: S812
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