| 河套灌区秋浇对不同类型农田土壤氮素淋失的影响 |
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| 引用本文： | 冯兆忠,王效科,冯宗炜,刘宏云,李延林.河套灌区秋浇对不同类型农田土壤氮素淋失的影响[J].生态学报,2003,23(10):2027-2032. |
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| 作者姓名： | 冯兆忠 王效科 冯宗炜 刘宏云 李延林 |
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| 作者单位： | 1. 中国科学院生态环境研究中心,北京,100085
2. 内蒙古河套灌区沙壕渠试验站,杭锦后旗,015400 |
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| 基金项目： | 国家自然科学基金资助项目 ( 30 0 70 14 9)~~ |
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| 摘 要： | 研究了河套灌区秋浇对不同类型农田 NO3 - N淋失的影响。结果表明 ,秋浇前小麦和白菜地 NO3 - N含量最高 ,玉米地和小麦 -玉米套种地次之 ,葵花地最低。秋浇后土壤剖面 NO3 - N的损失量按照表层 (0～40 cm)、中层 (40～ 80 cm)、深层 (80～ 1 2 0 cm)依次递减 (玉米地除外 )。不同农田 NO3 - N淋失量按照小麦地、白菜地、玉米地、葵花地、小麦 -玉米地依次递减。这说明 ,发展套种耕作将有利于减少氮素淋失。土壤 NO3 -N的淋失还直接导致地下水质的恶化。在当前的耕作制度及秋浇定额下 ,河套灌区每年可损失约 2 .6× 1 0 7kg N。因此 ,需要科学地确定秋浇方式和秋浇量 ,减少氮素淋失 ,减少地下水污染
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| 关 键 词： | 秋浇 土壤NO3-N 淋失量 农田类型 河套灌区 |
| 文章编号： | 1000-0933(2003)10-2027-06 |
| 收稿时间： | 2002/12/9 0:00:00 |
| 修稿时间： | 2003/5/24 0:00:00 |
Influence of autumn irrigation on soil N leaching loss of different farmlands in Hetao irrigation district, China |
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| FENG Zhaozhong,WANG Xiaoke,FENG Zongwei,LIU Hongyun and LI Yanlin.Influence of autumn irrigation on soil N leaching loss of different farmlands in Hetao irrigation district, China[J].Acta Ecologica Sinica,2003,23(10):2027-2032. |
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| Authors: | FENG Zhaozhong WANG Xiaoke FENG Zongwei LIU Hongyun and LI Yanlin |
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| Institution: | . Research Center for Eco-environmental Sciences; Chi ne se Academy of Sciences; Beijing; China |
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| Abstract: | Autumn irrigation is a particular irrigation system, which washes salt to deeper soil profile and keeps higher soil water content for cultivating next spring cr ops in Hetao Irrigation District of China. Autumn irrigation occurs during the n on-growing season and may cause leaching of any nitrates left in the soil profi l e. However, this nitrate leaching has been rarely paid attention. The paper is a imed to determine and compare the effects of autumn irrigation on soil nitrate l eaching among different fa... |
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| Keywords: | autumn irrigation NO 3 N in soil profile leaching amount farmlands Hetao i rrigation district |
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