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《Chinese Journal of Applied Ecology》 2007-11
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Characteristics of artificial grassland plant communities with different establishment duration and their relationships with soil properties in the source region of Three Rivers in China

WANG Chang-ting1,CAO Guang-min1,WANG Qi-lan1,SHI Jian-jun3,DU Yan-gong1,4,LONG Rui-jun2(1Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining 810001,China;2College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730070,China;3Institute of Grassland,Qinghai Academy of Animal and Veterinary Science,Xining 810016,China;4Graduate University of Chinese Academy of Sciences,Beijing 100049,China)  
This paper studied the biomass,species composition,and diversity index of artificial grassland plant communities with different establishment duration in the source region of the Three Rivers,and examined the relationships of soil physical and chemical properties with the changes of the plant community biomass and species diversity.The results showed that the species composition,functional group composition,and quantitative characters of the plant communities varied greatly.Soil moisture content increased with increasing species diversity,while soil bulk density was in adverse.Soil microbial biomass carbon significantly positively correlated with soil moisture and organic matter contents,but negatively correlated with soil bulk density.Soil organic carbon content had a "V" type change,which was consistent with the change pattern of soil moisture content,and decreased with increasing soil bulk density.Plant community biomass had significant positive correlations with the contents of soil nutrients and moisture,and the increase of the above-and below-ground biomass of plant communities promoted the increase of soil nutrient contents.
【Fund】: 中国科学院“百人计划”项目;; 国家自然科学基金项目(30371021 40471133);; 中国科学院野外台站基金资助项目.
【CateGory Index】: S812
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