| 承德围场地区土壤水分扩散率的研究 |
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| 引用本文： | 魏飒,任树梅. 承德围场地区土壤水分扩散率的研究[J]. 中国农村水利水电, 2007, 0(1): 55-56,61 |
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| 作者姓名： | 魏飒 任树梅 |
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| 作者单位： | 中国农业大学水利与土木工程学院,北京,100083 |
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| 摘 要： | 通过试验研究了承德围场地区的土壤水分扩散率,结果表明:土壤剖面的水分扩散率在1.0×10-2~1.6×10 cm2/min变化,尤以第2层即耕作层土壤水分扩散率最大,第3层最小。扩散率与含水量符合经验公式D()θ=aebθ,呈指数函数变化,经统计分析均达到显著水平;土壤容重、孔隙大小、孔隙类型及土壤颗粒组成中粘粒含量对土壤水分扩散率都有一定的影响。
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| 关 键 词： | 围场地区 土壤水分扩散率 影响因素 |
| 文章编号： | 1007-2284（2007）01-0055-02 |
| 修稿时间： | 2006-01-20 |
Soil Moisture Diffusivity in Chengde Weichang Region |
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| WEI Sa,REN Shu-mei. Soil Moisture Diffusivity in Chengde Weichang Region[J]. China Rural Water and Hydropower, 2007, 0(1): 55-56,61 |
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| Authors: | WEI Sa REN Shu-mei |
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| Abstract: | The soil moisture diffusivity in Weichang region was studied.The results were as follows: Firstly,the soil moisture diffusivity was changeable form to cm~2min~(-1).There was spatial variability in soil moisture diffusivity,and the high soil moisture diffusivity occurred in the second soil layer while the low in the third soil layer.The relationship between soil moisture diffusivity and soil water content in every soil layer were sharp positive exponential function,and these relationship were significant by statistical analysis.Then,the bulk density,porosity,the type of pore and clay content in the soil affected the soil moisture diffusivity. |
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| Keywords: | Weichang region soil diffusivity affective factors |
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