Full-Text Search:
Home|About CNKI|User Service|中文
Add to Favorite Get Latest Update

Studies community composition and productivity in eastern edge of Qinghai-Tibetan Stipa aliena grassland

HAN Tian-hu1,ZHAO Zhong2,WANG An-lu3,FENG Jin1(1.General Grassland Station of Gansu Province,Lanzhou 730046,China;2.Grassland Monitoring Station of Gansu Province,Lanzhou 730046,China;3.Livestock Bureau of Tibetan Autonomous Prefecture of Gansu Province,Hezuo 747000,China)  
Vegetative structure(population dominance,community species and ecological dominance),biomass,its composition of population and plant community of Qinghai-Tibetan Stipa aliena grassland were studied.The results showed that plant species of S.aliena grassland were mesoxerophtyes and cold-resistant mesophytes,dominant and sub-dominant species were S.aliena and Festuca ovina respectively.There were many kinds of companion species and the dominance of 12 species were 0.150.Above-ground biomass dynamic of main species and plant community appeared a single-peaked curve along with growth stage,and existed different among different species.There appeared the highest values in bloom growth stage(from July to September).With the number of utilizing years increased,grassland plant composition succeeded from complex community to simple community,and grassland productivity decreased.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©CNKI All Rights Reserved