| 雨强及播栽方式对太湖地区麦田径流氮磷流失的影响 |
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| 引用本文： | 严磊,吴田乡,赵素雅,薛利红,侯朋福,徐德福,杨林章.雨强及播栽方式对太湖地区麦田径流氮磷流失的影响[J].土壤,2022,54(2):358-364. |
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| 作者姓名： | 严磊 吴田乡 赵素雅 薛利红 侯朋福 徐德福 杨林章 |
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| 作者单位： | 江苏省农业科学院农业资源与环境研究所;南京信息工程大学环境科学与工程学院;江苏省耕地质量与农业环境保护站,江苏省耕地质量与农业环境保护站,江苏省农业科学院,江苏省农业科学院农业资源与环境研究所,江苏省农业科学院农业资源与环境研究所,南京信息工程大学环境科学与工程学院,江苏省农业科学院农业资源与环境研究所 |
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| 基金项目： | 江苏省农业科技自主创新资金(CX19(1007));国家重点研发计划项目(2016YFD0801101) |
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| 摘 要： | 为明确太湖地区麦田氮磷流失特征,通过田间模拟试验研究了播栽方式(条播、撒播)和降雨强度(低,30 mm/h;中,60 mm/h;高,90 mm/h)对麦田氮磷流失的影响.结果表明:初始产流时间与雨强显著负相关,而径流系数与雨强显著正相关(P<0.01).径流氮磷浓度在径流初期较高,并随产流时间不断降低,且均可用对数函数...
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| 关 键 词： | 面源污染 旱地 地表径流 氮磷流失 |
| 收稿时间： | 2021/7/4 0:00:00 |
| 修稿时间： | 2021/9/27 0:00:00 |
Effects of Rainfall Intensity and Sowing Method on Nitrogen and Phosphorus Losses by Surface Runoff from Wheat Field in Taihu Lake Region |
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| YAN Lei,WU Tianxiang,ZHAO Suy,XUE Lihong,HOU Pengfu,XU Defu,YANG Linzhang.Effects of Rainfall Intensity and Sowing Method on Nitrogen and Phosphorus Losses by Surface Runoff from Wheat Field in Taihu Lake Region[J].Soils,2022,54(2):358-364. |
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| Authors: | YAN Lei WU Tianxiang ZHAO Suy XUE Lihong HOU Pengfu XU Defu YANG Linzhang |
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| Institution: | Key Lab of Agro-environment in Downstream of Yangtze Plain,Ministry of Agriculture and Rural Affairs,Institute of Agricultural Resources and Environment,Jiangsu Academy of Agricultural Sciences;China;School of Environmental Science and Engineering,Nanjing University of Information Science Technology;China;Jiangsu Station for Protection of Arable Land Quality and Agricultural Environment;China,Jiangsu Station for Protection of Arable Land Quality and Agricultural Environment,Jiangsu Academy of Agricultural Sciences,Key Lab of Agro-environment in Downstream of Yangtze Plain,Ministry of Agriculture and Rural Affairs,Institute of Agricultural Resources and Environment,Jiangsu Academy of Agricultural Sciences,Key Lab of Agro-environment in Downstream of Yangtze Plain,Ministry of Agriculture and Rural Affairs,Institute of Agricultural Resources and Environment,Jiangsu Academy of Agricultural Sciences,School of Environmental Science and Engineering,Nanjing University of Information Science Technology,Key Lab of Agro-environment in Downstream of Yangtze Plain,Ministry of Agriculture and Rural Affairs,Institute of Agricultural Resources and Environment,Jiangsu Academy of Agricultural Sciences |
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| Abstract: | To clarify the properties of N and P losses in Taihu lake region, the effects of sowing method (PR, plant in rows; BS, broadcast sowing) and rainfall intensity (SI, 30 mm/h; MI, 60 mm/h; LI, 90 mm/h) on N and P losses from wheat field were investigated by field simulation trial. The results showed that "initial runoff time" was negatively correlated with rainfall intensity while runoff coefficient positively correlated with rainfall intensity (P<0.01). N and P loss concentrations peaked at the initial stage and decreased over time following a logarithmic-function relationship. The loss rates of N and P showed a trend of "rising and then falling" with runoff time, and were greatest during middle to late period. The peak concentrations and rates of N and P losses increased with rainfall intensity except for N loss rate was the highest under MI in PR trials. Affected by runoff coefficient and nutrient loss rate, N and P loss amounts were significantly increased with rainfall intensity except for N loss was the highest under MI in PR treatments. NO-x-N (40%-62%) and particulate phosphorus (50%-71%) were the main forms of N and P losses respectively. Also, the runoff coefficient and nutrient loss rate were higher in PR treatment than those in BS treatment under the same rainfall intensity. The results suggest that rainfall-driven N and P losses have typical phase characteristics. N and P concentrations peak during the initial runoff period, while N and P loss rates are the highest during the middle-late phase. The runoff from wheat field with PR mode is more likely to be affected by rainfall intensity. |
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| Keywords: | non-point pollution upland field surface runoff nutrient loss |
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