| 农田浅层土壤氮素空间分布研究 |
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| 引用本文： | 郑险峰,李紫燕,李世清.农田浅层土壤氮素空间分布研究[J].生态环境,2002,11(4):370-372. |
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| 作者姓名： | 郑险峰 李紫燕 李世清 |
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| 作者单位： | 西北农林科技大学资源环境学院,陕西,杨陵,712100 |
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| 基金项目： | 农业部农业科技跨越计划项目(农跨2000-6) |
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| 摘 要： | 采用田间随机抽样法研究了麦田氮素的空间分布规律。从均值看,硝态氮在土壤0~20 cm表层大量累积,20~40 cm层锐减,下层变化减慢;土层中铵态氮含量低且表现出不同层次间的稳定性。小麦生长期间灌溉显著影响土壤中硝态氮的分布:与不灌水土壤样本相比较,灌溉大大降低了表层土壤硝态氮的累积量。土壤全氮0~20 cm层明显高于20~40 cm层。
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| 关 键 词： | 土壤氮素 空间分布 硝态氮累积 |
| 文章编号： | 1008-181X(2002)04-0370-03 |
| 修稿时间： | 2002年8月13日 |
Study on the distribution of nitrogen in shallow soil of farmland |
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| ZHENG Xian-feng,LI Zi-yan,LI Shi-qing College of Resources and Environmental Science,Northwestern Sci-Tech University of Agriculture and Forestry,Yangling,Shaanxi ,China.Study on the distribution of nitrogen in shallow soil of farmland[J].Ecology and Environmnet,2002,11(4):370-372. |
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| Authors: | ZHENG Xian-feng LI Zi-yan LI Shi-qing College of Resources and Environmental Science Northwestern Sci-Tech University of Agriculture and Forestry Yangling Shaanxi China |
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| Institution: | ZHENG Xian-feng,LI Zi-yan,LI Shi-qing College of Resources and Environmental Science,Northwestern Sci-Tech University of Agriculture and Forestry,Yangling,Shaanxi 712100,China |
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| Abstract: | The distribution of soil nitrogen in farmland was studied by the method of random sampling. According to the average content of NO3--N, it accumulates in 0~20 cm soil layer, then reduces greatly in 20~40 cm, but it changes less under 40 cm. How-ever, the content of NH4+-N is low and almost the same among different depth. The distribution of NO3--N in soil is influenced greatly by the irrigation in the growing period of winter wheat. Comparing with the un-irrigation soil, the accumulation of NO3--N reduces greatly in irrigation soil. The content of soil total nitrogen in 0~20 cm is much higher than 20~40 cm. |
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| Keywords: | soil nitrogen spatial distribution accumulation of NO3--N |
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