| 不同土壤含水率情况下透明塑膜覆盖增温效应的研究 |
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| 引用本文： | 沈荣开.不同土壤含水率情况下透明塑膜覆盖增温效应的研究[J].水科学进展,1999,10(4):368-374. |
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| 作者姓名： | 沈荣开 |
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| 作者单位： | 武汉水利电力大学水利工程系, 湖北武汉430072 |
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| 基金项目： | 国家自然科学基金(59839320);“九五”国家重点科技攻关项目“农田节水灌溉的增产及环境影响效应的应用基础研究” |
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| 摘 要： | 透明型膜覆盖后,土-气界面热平衡状况发生变化,使得覆盖后产生增温效应.通过边界层热平衡分析,建立了一维热传导数学模型,模型中考虑覆盖层的光学特性,忽略土壤水分运动对土壤温度分布的影响,经与土柱实验数据检验,表明模型具有良好的精度且塑膜覆盖对土壤热状况有强烈的影响.着重探讨了表土含水率不同所产生的热效应的差异.
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| 关 键 词： | 土壤含水率 透明塑膜 覆盖 增温效应 数值模拟 |
| 收稿时间： | 1998-08-17 |
| 修稿时间： | 1998-08-17 |
Temperature Regimes Effected by Different Soil Moisture in Soil Mulched with Transparent Polyethylene |
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| SHEN Rong-kai,DENG Shi-peng,ZHANG Yu-fang,HUANG Jie-sheng.Temperature Regimes Effected by Different Soil Moisture in Soil Mulched with Transparent Polyethylene[J].Advances in Water Science,1999,10(4):368-374. |
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| Authors: | SHEN Rong-kai DENG Shi-peng ZHANG Yu-fang HUANG Jie-sheng |
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| Institution: | Wuhan University of Hydraulic and Electric Engineering, Wuhan 430072, China |
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| Abstract: | In order to study the effect of soil mulching with transparent polyethylene film upon the soil temperature regimes with variou soil water content a numerical one dimensional model has been developed.Optical properties of the cover was considered and the effect of soil water movement on soil temperature distribution was ignored.The ability of the model to predict the temperature regimes of the mulched soil under different soil water content was tested.The calculated results agree well with the observed data.It was shown that the temperature regimes are significantly influneced by the polyethylene film.The model is used to calculate the soil heating by the transparent polyethylene film mulched in the area which inputs the data of meteorology information. |
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| Keywords: | soil water content transparent polyethy lene film mulch soil temperature numerical model |
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