| 地下水位调控对冬小麦排水中氮磷浓度的影响 |
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| 引用本文： | 徐翠兰,孙振海,孟佳佳.地下水位调控对冬小麦排水中氮磷浓度的影响[J].排灌机械工程学报,2015,33(10):887-894. |
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| 作者姓名： | 徐翠兰 孙振海 孟佳佳 |
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| 作者单位： | 1.江苏省土地开发整理中心, 江苏 南京 210017; 2.嘉兴市杭嘉湖南排工程桐乡河道管理站, 浙江 桐乡 314500; 3.淮安市水利规划办公室, 江苏 淮安 223005 |
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| 摘 要： | 为了寻找减少氮磷流失的最优控水方式,采用田间试验研究不同地下水位控制对冬小麦地氮磷流失的影响.研究结果表明,不同控水方式对冬小麦地排水中氮磷浓度影响明显.经地下水位控制,冬小麦各生育期地下排水中的氨态氮(NH+4-N)质量浓度降低,而硝态氮(NO-3-N)质量浓度则有所增加;拔节孕穗期保持水位100 mm处理排水总磷(TP)质量浓度增加,抽穗开花期排水TP质量浓度降低;拔节孕穗期保持水位-200 mm处理TP质量浓度降低,抽穗开花期则有所增加.冬小麦地土壤速效氮质量比在拔节孕穗期有所减少,抽穗开花期保持高水位有利于速效氮质量比降低,拔节孕穗期土壤中的速效磷质量比都有一定幅度的降低,抽穗开花期保持高水位有利于速效磷质量比降低,在水位较低的情况下,控水时间越长,速效磷质量比越大.
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| 关 键 词： | 冬小麦 地下水位 控水方式 氮磷流失 |
| 收稿时间： | 2014-10-09 |
Influence of underground water level regulation on nitrogen and phosphorus concentration of drainage in winter wheat fields |
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| Xu Cuilan,Sun Zhenhai,Meng Jiajia.Influence of underground water level regulation on nitrogen and phosphorus concentration of drainage in winter wheat fields[J].Journal of Drainage and Irrigation Machinery Engineering,2015,33(10):887-894. |
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| Authors: | Xu Cuilan Sun Zhenhai Meng Jiajia |
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| Institution: | 1.Jiangsu Provincial Center for Land Consolidation and Rehabilitation, Nanjing, Jiangsu 210017, China; 2.Jiaxing Tongxiang Riverway Precinct of the South Drainage Project in Hangzhou, Tongxiang, Zhejiang 314500, China;3. Huai′an Water Resources Planning Office, Huai′an, Jiangsu 223005, China |
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| Abstract: | To seek the optimal water control mode for reducing the nitrogen and phosphorus losses, so as to achieve high yield, pollution reduction, and water saving, the effect of nitrogen and phosphorus losses in winter wheat was studied by different field groundwater table controls. The results show that different water control patterns had an obvious effect on nitrogen and phosphorus concentration in winter wheat. Through the control of underground water, ammonium nitrogen(NH+4-N)in underground drainage at different growth stages of winter wheat was decreased, but the nitrate nitrogen(NO-3-N)was increased.Total phosphorus(TP)concentration of water treatment with the water level of 100mm kept increasing at the jointing-booting stage and kept decreasing at the heading-flowering stage, while that with the water level of-200 mm kept decreasing at the jointing-booting stage, but kept increasing at the heading-flowering stage. Soil available nitrogen content of winter wheat was reduced at the jointing-booting stage. Maintaining high water level at the heading-flowering stage was conducive to reducing the available nitrogen content. Available phosphorus content at the jointing-booting stage in soil was reduced to a certain extent. Maintaining high water level at the heading-flowering stage can reduce the available phosphorus content. At the lower water level, the longer the water control time was, the greater the available phosphorus content was. |
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| Keywords: | winter wheat underground water level water control mode nitrogen and phosphorus losses |
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