| 土壤微生物生物氮与植物氮吸收的关系 |
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| 引用本文： | ZHOU Jian-Bin,LI Sheng-Xiu,CHEN Zhu-Jun. 土壤微生物生物氮与植物氮吸收的关系[J]. 土壤圈, 2002, 12(3): 251-256 |
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| 作者姓名： | ZHOU Jian-Bin LI Sheng-Xiu CHEN Zhu-Jun |
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| 作者单位： | [1]CollegeofResourcesandEnvironmentalSciences,NorthwestSci－TechUniversityofAgricultureandForestry,Yangling,Shaanxi712100（China） [2]CollegeofResourcesandEnvironmentalSciences,NorthwestSci－TechUniversityofAgr |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划) |
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| 摘 要： | The contents of the soil microbial biomass nitrogen (SMBN) in the soils sampled from the Loess Plateau of China were determined using chloroform fumigation aerobic incubation method (CFAIM),chloroform fumigation anaerobic incubation method (CFANIM) and chloroform fumigation-extraction method (CFEM). The N taken up by ryegrass on the soils was determined after a galsshouse pot experiment. The flushes of nitrogen (FN) of the soils obtained by the CFAIM and CFANIM were higher than that by the CFEM, and there were significantly positive correlations between the FN obtained by the 3 methods. The N extracted from the fumigated soils by the CFAIM,CFANIM and CFEM were significantly positively correlated with the N uptake by ryegrass. The FN obtained by the 3 methods was also closely positively correlated with the N uptake by ryegrass. The FN obtained by the 3 methods was also closely positively correlated with the plant N uptake. The contributions of the SMBN and mineral N and mineralized N during the incubation period to plant N uptake were evaluated with the multiple regression method. The results showed that the N contained in the soil microbial biomass might play a noticeable role in the N supply of the soils to the plant.
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| 关 键 词： | 无机氮 植株氮 相关性 土壤氮 土壤微生物氮 生物量 |
Soil microbial biomass nitrogen and its relationship to uptake of nitrogen by plants |
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| ZHOU Jian-Bin,LI Sheng-Xiu and CHEN Zhu-Jun. Soil microbial biomass nitrogen and its relationship to uptake of nitrogen by plants[J]. Pedosphere, 2002, 12(3): 251-256 |
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| Authors: | ZHOU Jian-Bin LI Sheng-Xiu CHEN Zhu-Jun |
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| Affiliation: | College of Resources and Environmental Sciences, Northwest Sci-Tech University of Agriculture and Forestry, Yangling, Shaanxi 712100 (China);College of Resources and Environmental Sciences, Northwest Sci-Tech University of Agriculture and Forestry, Yangling, Shaanxi 712100 (China);College of Resources and Environmental Sciences, Northwest Sci-Tech University of Agriculture and Forestry, Yangling, Shaanxi 712100 (China) |
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| Abstract: | The contents of the soil microbial biomass nitrogen (SMBN) in the soils sampled from the Loess Plateau of China were determined using chloroform fumigation aerobic incubation method (CFAIM), chloroform fumigation anaerobic incubation method (CFANIM) and chloroform fumigation-extraction method (CFEM).The N taken up by ryegrass on the soils was determined after a glasshouse pot experiment. The flushes of nitrogen (FN) of the soils obtained by the CFAIM and CFANIM were higher than that by the CFEM, and there were significantly positive correlations between the FN obtained by the 3 methods. The N extracted from the fumigated soils by the CFAIM, CFANIM and CFEM were significantly positively correlated with the N uptake by ryegrass. The FN obtained by the 3 methods was also closely positively correlated with the plant N uptake. The contributions of the SMBN and mineral N and mineralized N during the incubation period to plant N uptake were evaluated with the multiple regression method. The results showed that the N contained in the soil microbial biomass might play a noticeable role in the N supply of the soils to the plant. |
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| Keywords: | mineral N N uptake soil microbial biomass N |
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