| 土壤微生物量氮与玉米氮素养分利用关系研究 |
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| 引用本文： | 张振中,陆引罡,崔保伟,任琨.土壤微生物量氮与玉米氮素养分利用关系研究[J].贵州大学学报(农业与生物科学版),2009,28(2). |
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| 作者姓名： | 张振中 陆引罡 崔保伟 任琨 |
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| 作者单位： | 贵州大学,农学院,贵州,贵阳,550025 |
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| 摘 要： | 通过大田试验,研究了不同施氮量下土壤微生物量氮与玉米氮素养分利用的关系.结果表明,在同一生育期内,土壤微生物量氮含量随氮肥施用量的增加而增加;在不同生育期内,土壤微生物量氮在苗期达到最高,在拔节期、孕穗期明显降低,到成熟期又有增加的趋势;与玉米在各生育时期的吸氮量呈负相关关系,且施氮量越大,负相关程度越高.土壤微生物量氮的基础含量与玉米吸氮量基本吻合(土壤有效氮素养分校正系数为96.52% ),表明其能够表征土壤的供氮能力.
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| 关 键 词： | 土壤微生物量氮 作物吸氮量 土壤有效氮素养分 校正系数 玉米 |
Relationship between Microbial Biomass Nitrogen and Nitrogen Utilization of Maize |
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| ZHANG Zhen-zhong,LU Yin-gang,CUI Bao-wei,REN Kun.Relationship between Microbial Biomass Nitrogen and Nitrogen Utilization of Maize[J].Journal of Mountain Agriculture & Biology,2009,28(2). |
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| Authors: | ZHANG Zhen-zhong LU Yin-gang CUI Bao-wei REN Kun |
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| Institution: | Agricultural College;Guizhou University;Guiyang;Guizhou550025;China |
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| Abstract: | A series of field experiments were designed to investigate the relationship between microbial biomass nitrogen(N) and N utilization of maize in the present study.The results showed that,within the same growth period,the content of soil microbial biomass N increased with the enhanced application of this nutrient.In the different growth phase,the content of soil microbial biomass N got the highest at the seedling stage,followed by a significant reduction in jointing stage and booting stage.However,it is prone... |
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| Keywords: | Soil microbial biomass nitrogen Nitrogen absorption Soil available nitrogen Correlated coefficient Maize |
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