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《Acta Agrestia Sinica》 2002-03
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Nitrogen Fixation in Leymus chinensis Grassland in Northeast China

LI Yu-zhong 1,Redmann R.E. 2,ZHU Ting-cheng 3,LI Jian-dong 3 (1.Agrometeorology Institute, CAAS, Beijing 100081, China; 2.Plant and Soil Department, University of Saskatchewan, Canada; 3.Grassland Institute, Northeast Normal University, Changchu  
A combined transect and quadrats measure was adopted to study on the frequency, density and biomass of legume forages in Leymus chinensis grassland, the concentration of N 2 fixing plant-Lathyrus quinquenervius and nonfixing control plant-L.chinensis were measured by micro-Kjeldahl method, and the 15 N isotope dilution method was used to study the percentage of by legumes of that grassland is 1.5kgN/hm 2.
【Fund】: 国家自然科学基金国际合作项目 93890 0 9-1;; 社会公益研究项目;; 国家高技术研究发展计划项目 ( 2 0 01AA2 42 0 41)资助
【CateGory Index】: S812
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