| 农田水位管理系统地下排水磷淋失实验研究 |
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| 引用本文： | 胡亚琼,许迪,Valero C S,A Madramootoo C,王少丽.农田水位管理系统地下排水磷淋失实验研究[J].农业环境保护,2011(8):1645-1651. |
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| 作者姓名： | 胡亚琼 许迪 Valero C S A Madramootoo C 王少丽 |
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| 作者单位： | [1]中国水利水电科学研究院水利所,北京100044 [2]Department of Bioresource Engineering, McGill University, Montreal H9X 3V9,Canada |
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| 基金项目： | 国家自然科学基金重点项目（50639040 50739003）; 中国水利水电科学研究院科研专项（节集0809） |
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| 摘 要： | 农田控制排水对减少土壤养分淋失、保护农田水环境具有重要作用。为探讨影响地下排水磷淋失量的要素,基于田间实验小区观测资料,统计分析了玉米作物生长期间农田水位管理系统运行对地下排水量和磷淋失量的影响,结果表明,与暗管自由排水系统相比,农田水位管理系统下的累积排水总量约减少1/3,但次地下排水磷淋失浓度和地下排水总磷累积淋失量均明显增高。农田水位管理系统下存在的土壤持续性饱和厌氧状态造成地下排水中氧化还原电位Eh的明显降低和pH值及可溶解性Mn和Fe浓度的显著增大,这或许是导致该系统地下排水磷淋失量明显高于暗管自由排水系统的主要影响因素。
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| 关 键 词： | 农田水位管理系统 暗管自由排水系统 地下排水 磷淋失 氧化还原电位 |
The Effects of Water Table Management on Phosphorus Leaching Loss in the Farmland Drainage |
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| HU Ya-qiong,XU Di,Valero C S,A Madramootoo C,WANG Shao-li.The Effects of Water Table Management on Phosphorus Leaching Loss in the Farmland Drainage[J].Agro-Environmental Protection,2011(8):1645-1651. |
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| Authors: | HU Ya-qiong XU Di Valero C S A Madramootoo C WANG Shao-li |
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| Institution: | 1.China Institute of Water Resources and Hydropower Research,Beijing 100044,China;2.Department of Bioresource Engineering,McGill University,Montreal H9X 3V9,Canada) |
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| Abstract: | It is significant that the nutrients loss could be reduced and the water environment could be protected via controlled drainage.The effects of water table management system on the outflow volumes of sub-surface drainage and phosphorous leaching loss were statistically analyzed during the growing season of corn.The results showed that the total outflow volumes were reduced about 1/3 from water table management system compared to free drainage system.However,the concentration of phosphorus（P）of drainage and the total phosphorus leaching loss were significant higher under water table management system than free drainage system.At the meantime,the oxidation-reduction potential（Eh） was lower and pH value and concentration of dissolved Mn and Fe were higher in water table management system compared to free drainage system.These results indicated that the increased P leaching loss in drainage under water table management system were most likely caused by an increase in P solubility due to continuously anaerobic condition which aroused the changes of values of Eh,pH and concentration of Mn and Fe. |
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| Keywords: | water table management（CI/SI） free drainage（FD） sub-surface drainage phosphorus leaching loss oxidation-reduction potential（Eh） |
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