| 土壤水湿状况和肥料碳氮比对稻田肥料氮素转化的影响 |
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| 引用本文： | 朱培立,黄东迈. 土壤水湿状况和肥料碳氮比对稻田肥料氮素转化的影响[J]. 土壤学报, 1986, 23(3): 251-261 |
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| 作者姓名： | 朱培立 黄东迈 |
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| 作者单位： | 江苏省农业科学院土壤肥料研究所;江苏省农业科学院土壤肥料研究所 |
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| 摘 要： | 本文应用15N示踪法,测定并探讨了土壤中三种水分状况及四种不同C/N值肥料对肥料氮素转化的影响,试验结果表明:土壤水分和肥料C/N值均对水稻产量有较大的影响,相比之下,土壤水分的影响似更大.水稻对肥料氮的吸收利用率,淹水栽植高于旱植,氮素固定在旱地条件下作用加强,淹水并有一定渗漏的土壤上肥料氮的损失最大,示踪结果说明从土壤渗漏液中淋失的氮素80%以上为土壤固有氮素,相对而言肥料氮的损失较低.试验还表明肥料中碳氮值与肥料氮的吸收利用率之间呈负相关,与肥料残留率呈正相关.此外,本试验还测定了土壤水湿状况和肥料碳氮值在土壤氮素转化中的作用,讨论了当土壤氮素矿化和固定作用相等时,有机肥的碳氮临界值及其实用意义.
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NITROGEN TRANSFORMATION IN PADDY SOIL AS AFFECTED BY DIFFERENT SOIL WATER REGIMES AND C/N RATIO OF MANURE |
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| Zhu Peili and Huang Dongmai. NITROGEN TRANSFORMATION IN PADDY SOIL AS AFFECTED BY DIFFERENT SOIL WATER REGIMES AND C/N RATIO OF MANURE[J]. Acta Pedologica Sinica, 1986, 23(3): 251-261 |
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| Authors: | Zhu Peili and Huang Dongmai |
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| Affiliation: | Institute of Soil and Fertilizer, Jiangus Academy of Agricultural Sciences;Institute of Soil and Fertilizer, Jiangus Academy of Agricultural Sciences |
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| Abstract: | The transformation of nitrogen was studied in a well-drained paddy soil by adding 15N labelled cratalaria,15N labelled wheat straw,(15NH4)2SO4 and (15NH4)2SO4 together with cellulos so as to adjust the C/N ratio of applied fertilizer from zero to 50 at the same N level.Rice was planted under three soil water regimes,i.e.submerged condition,submerged and percolated condition (1.5 cm/day),and dryland condition kept with 60% W.H.C. |
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