| 土壤矿质氮和可矿化氮对当季作物的贡献 |
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| 引用本文： | 刘晓宏,郝明德,田梅霞.土壤矿质氮和可矿化氮对当季作物的贡献[J].生态环境,2001,10(3):207-209. |
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| 作者姓名： | 刘晓宏 郝明德 田梅霞 |
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| 作者单位： | 1. 中国科学院寒区旱区环境与工程研究所,
2. 中国科学院水土保持研究所, |
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| 基金项目： | 国家自然科学基金重大项目(49890330);中科院基金项目(KZ951-A1-402-03) |
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| 摘 要： | 从土壤矿质氮-硝态氮和铵态氮、土壤可矿化氮3个指标研究了土壤剖面不同层次有效氮对作物吸氮的贡献.结果表明,不同指标反映土壤供氮能力状况不一.土壤硝态氮和土壤可矿化氮与作物吸氮有较好的相关关系,而土壤铵态氮与作物吸氮关系不密切.在深度120cm之上的土层的土壤可矿化氮对作物吸氮有较大的贡献.在考虑土壤供氮能力时,建议应该考虑120cm深层以上的土壤.
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| 关 键 词： | 土壤硝态氮 土壤铵态氮 土壤可矿化氮 作物吸氮 深层土壤 |
| 文章编号： | 1008-181(2001)03-0207-03 |
| 修稿时间： | 2001年4月13日 |
Contribution of soil mineral nitrogen and soil mineralization nitrogen to seasonal crop |
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| LIU Xiao-hong,HAO Ming-de,TIAN Mei-xia.Contribution of soil mineral nitrogen and soil mineralization nitrogen to seasonal crop[J].Ecology and Environmnet,2001,10(3):207-209. |
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| Authors: | LIU Xiao-hong HAO Ming-de TIAN Mei-xia |
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| Institution: | LIU Xiao-hong1,2,HAO Ming-de2,TIAN Mei-xia2 |
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| Abstract: | We study the contribution of soil mineral(NO3--N, NH4 -N)and Mineralization nitrogen(N0) to seasonal crop. The results show: different index has the vary corelation to nitrogen adsorption of crop and there are better relationship between soil NO3-N, N0 and assimilat nitrogen of crop; but no better relationship to soil ammonium. The N0 of upper 120 cm soil had the great works to the nitrogen assimilation of crop, so we should take into account the NO of upper 120 cm soil as we evaluate the soil N-supply. |
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| Keywords: | soil mineral nitrogen soil mineralization nitrogen depth soil adsorption nitrogen of crop |
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