| 低定额灌溉条件下农田土壤水蒸散模型的研究 |
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| 引用本文： | 韩雄,张强,安静华.低定额灌溉条件下农田土壤水蒸散模型的研究[J].华北水利水电学院学报,2000,21(1):20-23. |
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| 作者姓名： | 韩雄 张强 安静华 |
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| 作者单位： | 1. 山西省农科院土壤肥料研究所,山西,太原,030031
2. 水利部山西水利水电勘测设计研究院,山西,太原,030031 |
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| 摘 要： | 在低定额灌溉条件下 ,农田土壤水分常处在水分胁迫条件下 ,对水分胁迫下农田土壤水分蒸散模型进行了研究 ,在水分胁迫下实际蒸散量 (ET)与潜在蒸散量 (ETm)之间关系为 :ET =KW·ETm·KW,与根层土壤有效水含量具有直线相关性 .模型中考虑根系分布的影响 ,能明显提高模型精度 ,为低定额灌溉确定农田实际耗水量提供科学依据 ,并提高农田土壤水分利用率
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| 关 键 词： | 低定额灌溉 蒸散模型 |
| 修稿时间： | : |
Study on evapotranspiration model of agricultural soil water under low irrigation |
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| HAN Xong,ZHANG Qiang,AN Jing-hua.Study on evapotranspiration model of agricultural soil water under low irrigation[J].Journal of North China Institute of Water Conservancy and Hydroelectric Power,2000,21(1):20-23. |
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| Authors: | HAN Xong ZHANG Qiang AN Jing-hua |
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| Abstract: | Under low irrigation, agricultural soil water is usually stressed by water.A soil evapotranspiration modelwas studied under water stress.Under water stress, the relationship between actual evapotranspiration(ET) and potential evapotranspiration(ET m ) could be caculated as : ET= K w ET m , K w is linearly correlated with soil effective moisture. In this model, root distribution was considered, so the model precision was significantly improved. As a result,it could confirm actual water requirement so as to improve soil water efficiency.WX(5KG0,41] |
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| Keywords: | low irrigation evapotranspiration model water stress |
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