Nitrogen Fixation in Leymus chinensis Grassland in Northeast China

doi:10.11733/j.issn.1007-0435.2002.03.002

›› 2002, Vol. 10 ›› Issue (3): 164-166.DOI: 10.11733/j.issn.1007-0435.2002.03.002

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Nitrogen Fixation in Leymus chinensis Grassland in Northeast China

LI Yu-zhong¹, Redmann R. E.², ZHU Ting-cheng³, LI Jian-dong³

1. Agrometeorology Institute, CAAS, Beijing 100081, China;
2. Plant and Soil Department, University of Saskatchewan, Canada;
3. Grassland Institute, Northeast Normal University, Changchu 130024, China

Received:2001-12-13 Revised:2002-01-27 Online:2002-08-15 Published:2002-08-15

羊草草原豆科牧草生物固定量研究

李玉中¹, Redmann R. E.², 祝廷成³, 李建东³

1. 中国农业科学院农业气象研究所, 北京, 100081;
2. 萨斯卡切温植物与土壤系, 加拿大;
3. 东北师范大学草地研究所, 长春, 130024

作者简介:李玉中(1964- ),男,内蒙古赤峰人,副研,主要从事生态学、农业减灾等方面的研究工作
基金资助:
国家自然科学基金国际合作项目9389009-1;社会公益研究项目;国家高技术研究发展计划项目(2001AA242041)资助

Abstract

Abstract: 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 N₂ fixing plant-Lathyrus quinquenervius and nonfixing control plant-L.chinensis were measured by micro-Kjeldahl method, and the ¹⁵N isotope dilution method was used to study the percentage of by legumes of that grassland is 1.5kgN/hm².

Key words: Legume, Nitrogen fixation, ¹⁵N isotope dilution

摘要： 采用样线和样方相结合的方法测定东北羊草草原豆科牧草的频度、密度和生物量,用微量凯氏定氮法测定豆科牧草和参照植物的氮浓度,用¹⁵N同位素稀释法测定豆科牧草的氮素固定比例,并结合生物量测定结果,计算豆科牧草的年际生物固氮量为1.5kgN/hm²。

关键词: 15N同位素稀释法, 豆科牧草, 生物固氮

CLC Number:

S812

LI Yu-zhong, Redmann R. E., ZHU Ting-cheng, LI Jian-dong. Nitrogen Fixation in Leymus chinensis Grassland in Northeast China[J]. , 2002, 10(3): 164-166.

李玉中, Redmann R. E., 祝廷成, 李建东. 羊草草原豆科牧草生物固定量研究[J]. , 2002, 10(3): 164-166.

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Nitrogen Fixation in Leymus chinensis Grassland in Northeast China

羊草草原豆科牧草生物固定量研究

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