| 冬小麦-夏玉米轮作条件下氮素反硝化损失研究 |
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| 引用本文： | 邹国元,张福锁,巨晓棠,陈新平,刘学军.冬小麦-夏玉米轮作条件下氮素反硝化损失研究[J].中国农业科学,2004,37(10):1492-1496. |
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| 作者姓名： | 邹国元 张福锁 巨晓棠 陈新平 刘学军 |
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| 作者单位： | 1. 北京市农林科学院植物营养与资源研究所,北京,100089;中国农业大学植物营养系,北京,100094
2. 中国农业大学植物营养系,北京,100094 |
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| 基金项目： | 国家自然科学基金重大项目资助(30390080)，北京市科技新星资助项目(954813300) |
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| 摘 要： | 在北京潮土上研究了冬小麦-夏玉米轮作体系下土壤氮素反硝化损失。结果表明，不同氮肥用量处理，土壤氮素反硝化损失量为4.71～9.67 kg·ha-1。夏玉米生育期是反硝化损失的关键时期。氮肥施用后的1～2周是氮素反硝化损失的最剧烈阶段。土壤N2O的生成、排放与反硝化作用有相似的规律性，N2O可能大部分来自于硝化作用。
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| 关 键 词： | 潮土 冬小麦 夏玉米 反硝化 N2O |
| 收稿时间： | 2004-2-11 |
Study on Soil Denitrification in Winter Wheat-Summer Maize Rotation System |
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| ZOU Guo-yuan,ZHANG Fu-suo,JU Xiao-tang,CHEN Xin-ping,LIU Xue-jun.Study on Soil Denitrification in Winter Wheat-Summer Maize Rotation System[J].Scientia Agricultura Sinica,2004,37(10):1492-1496. |
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| Authors: | ZOU Guo-yuan ZHANG Fu-suo JU Xiao-tang CHEN Xin-ping LIU Xue-jun |
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| Institution: | ZOU Guo-yuan1,2,ZHANG Fu-suo2,JU Xiao-tang2,CHEN Xin-ping2,LIU Xue-jun2 |
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| Abstract: | Soil denitrification was studied in winter wheat-summer maize rotation cropping system with an aquic cambisol. Results showed that the N loss amount by denitrification ranged from 4.7 to 9.7 kg·ha-1 with different rates of fertilizer nitrogen. The key stage of denitification was during summer maize-growth-period, especially within 1-2 weeks after fertilizer nitrogen was applied. Similar trend was found between soil N2O production/emission dynamic and denitrification dynamic in the rotation system. This may indicate that N2O mainly produced in nitrification process. |
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| Keywords: | Aquic cambisol Winter wheat Summer maize Denitrification N_2O |
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