| 玉米-潮土系统中氮肥硝化反硝化损失与N_2O排放 |
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| 引用本文： | 丁洪,蔡贵信,等.玉米-潮土系统中氮肥硝化反硝化损失与N_2O排放[J].中国农业科学,2001,34(4):416-421. |
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| 作者姓名： | 丁洪 蔡贵信 |
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| 作者单位： | [1]福建省农业科学院土壤肥料研究所，福州350013 [2]中国科学院南京土壤研究所，南京210008 |
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| 基金项目： | 国家自然科学基金(49901010,39790100),中国科学院大气边界层物理和大气化学国家重点实验室开放课题(LAPC-KF-2001-02), 澳大利亚ACIAR LWR 196/1 64,中国博士后基金和中国科学院王宽诚博士后基金,中国科学院土壤圈物质循环开放实验室项目 |
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| 摘 要： | 在华北平原潮土上应用原状土柱状态乙炔抑制法测定夏季玉米地氮肥硝化反硝化气态损失重和N2O排放量。结果表明，潮土上尿素氮水解快，砂化活性较高。不施氮肥处理下土壤中N2O排放总量为0．33kgN/ha；施氮大大增加N2O排放量，氮肥表施时N2O排放量为2．91kgN/ha，穴施时为2．50kgN/ha，分别为施氮量的1．94％和1．67％。不施氮肥时土壤氮的反硝化损失量为1．17kgN/ha，氮肥反硝化损失量表施时为3．00kgH/ha，穴施时为2．09kgN/ha，分别占施氮量的2．00％和1．39％。硝化反硝化作用不是该地区氮肥损失的主要途径。
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| 关 键 词： | 玉米 潮土 施肥 氮肥 硝化反硝化 |
| 文章编号： | 0578-1752(2001)-04-0416-06 |
| 修稿时间： | 2000年5月29日 |
Nitrification-denitrification Losses of Nitrogen Fertilizer and N2O Emission From Maize-chao Soil System in North China Plain |
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| DING Hong ,CAI Gui xin ,WANG Yue si ,CHEN De li.Nitrification-denitrification Losses of Nitrogen Fertilizer and N2O Emission From Maize-chao Soil System in North China Plain[J].Scientia Agricultura Sinica,2001,34(4):416-421. |
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| Authors: | DING Hong CAI Gui xin WANG Yue si CHEN De li |
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| Institution: | DING Hong 1,3,CAI Gui xin 2,WANG Yue si 3,CHEN De li 4 |
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| Abstract: | A field experiment was carried out to determine nitrification denitrification losses and N 2O emission of applied fertilizer nitrogen by acetylene inhibition soil core incubation method in maize chao soil system in North China plain. Results showed that urea was hydrolyzed fast with a high nitrification activity. The total N 2O emitted from soil ( without N applied) was 0.33kg N/ha, while the amount of N 2O from the soil in which N fertilizer applied was 2.91kg N/ha (1.94% of applied N) by surface broadcasting and 2.50kg N/ha (1.67% of applied N) by point deep placement. The corresponding figures for denitrification loss were 1.17kg N/ha , 3.00kg N/ha (2.00% of applied N) and 2.09kg N/ha (1.39% of applied N ) respectively. The results indicated that nitrification denitrification loss is probably not a main passway of fertilizer nitrogen loss in the region. |
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| Keywords: | Maize Chao soil Application Nitrogen fertilizer Nitrification denitrification |
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