| 稻田氮素淋洗损失研究 |
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| 引用本文： | 田玉华,尹斌,朱兆良. 稻田氮素淋洗损失研究[J]. 安徽农业科学, 2006, 34(12): 2792-2794 |
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| 作者姓名： | 田玉华 尹斌 朱兆良 |
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| 作者单位： | 1. 中国科学院南京土壤研究所,江苏,南京,210008;中国科学院研究生院,北京,100000
2. 中国科学院南京土壤研究所,江苏,南京,210008 |
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| 基金项目： | 国家自然科学基金(40571077)，中国科学院知识创新工程项目(KZCX-413)。 |
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| 摘 要： | 采用田间小区试验,连续2年研究了施氮量、分子膜对稻田氮素淋洗损失和氮素平衡的影响,结果表明:稻田以铵态氮淋洗损失最少,90cm处浓度低于0.2mg/L;水稻移栽和烤田后硝态氮浓度达到峰值,以90cm处浓度为0.2～0.9mg/L;整个稻季氮素淋洗量为3.2～5.6kg/hm2,占施氮量的1.4%～2.5%。
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| 关 键 词： | 稻田 氮肥 淋洗 |
| 文章编号： | 0517-6611（2006）12-2792-03 |
| 收稿时间： | 2006-04-17 |
| 修稿时间： | 2006-04-17 |
Study on Nitrogen Losses Via Leaching in Paddy Soil |
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| TIAN Yu-hua et al. Study on Nitrogen Losses Via Leaching in Paddy Soil[J]. Journal of Anhui Agricultural Sciences, 2006, 34(12): 2792-2794 |
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| Authors: | TIAN Yu-hua et al |
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| Affiliation: | Institute of Soil Science, Chinese Academy of Sciences, Nanjing,Jiangsu 210008 |
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| Abstract: | Nitrogen losses via leaching on paddy soil in Taihu Lake region were studied for two successional years. Results showed that ammonium leaching was minor and its concentration at 90 cm depth was below 0.2 mg/L. Nitrate and dissolved organic nitrogen were the main forms for nitrogen leaching. There were two peak values for nitrate during rice growing season: one was at the beginning of rice season and the other was after soil drying. The nitrate concentration ranged from 0.2 to 0.9 mg/L at 90 cm depth. Nitrogen load in leachate was 3.2～5.6 kg/hm2 in rice season,accounting for 1.4 %～2.5 % of applied fertilizer. Nitrogen surplus besides leaching losses paralleled N uptake by rice,indicating that the hazards of water and air pollution of nitrogen fertilizer applied on paddy soil were great. |
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| Keywords: | Paddy soil Nitrogen fertilizer Leaching |
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