| 羊草草原豆科牧草生物固定量研究 |
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| 引用本文： | 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]. 草地学报, 2002, 10(3): 164-166. DOI: 10.11733/j.issn.1007-0435.2002.03.002 |
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| 作者姓名： | 李玉中 Redmann R.E 祝廷成 李建东 |
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| 作者单位： | 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 |
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| 基金项目： | 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 |
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| 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。
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| 关 键 词： | 15N同位素稀释法 豆科牧草 生物固氮 |
| 收稿时间： | 2001-12-13 |
Nitrogen Fixation in Leymus chinensis Grassland in Northeast China |
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| LI Yu-zhong ,Redmann R.E. ,ZHU Ting-cheng ,LI Jian-dong. Nitrogen Fixation in Leymus chinensis Grassland in Northeast China[J]. Acta Agrestia Sinica, 2002, 10(3): 164-166. DOI: 10.11733/j.issn.1007-0435.2002.03.002 |
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| Authors: | LI Yu-zhong Redmann R.E. ZHU Ting-cheng LI Jian-dong |
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| Affiliation: | 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 |
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| 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 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. |
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| Keywords: | Legume Nitrogen fixation 15 N isotope dilution |
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