容重对土壤水分蓄持能力影响模拟试验研究
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国家863计划课题“降水资源转化利用技术”(2006AA100204)、新世纪优秀人才支持计划(01140602)、高等学校学科创新引智计划和国家自然科学基金课题“黄土高原小流域降雨径流调控利用潜力动态分析与优化配制研究”(40701092)资助


Simulated experiment on effects of soil bulk density on soil water holding capacity
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    摘要:

    通过人工改变土壤颗粒级配,并设置不同容重水平,测定土壤水分特征参数,研究了容重对土壤水分蓄持能力的定量影响。结果表明:(1)容重对土壤水分特征曲线、比水容量有较大影响,试验土壤各吸力段水分蓄持能力均随容重增大递减,比水容量也随容重增大递减。(2)容重对试验土壤饱和含水量、田间持水量、凋萎系数有较大影响,此3个水分参数均随容重增大递减。饱和含水量与容重呈幂函数负相关关系,田间持水量及凋萎系数均与容重呈指数负相关关系。(3)容重对试验土壤有效水、易效水、迟效水含量有较大影响,此3水分参数均随容重增大递减,分别与容重呈指数、幂函数、对数负相关关系。

    Abstract:

    Effects of soil bulk density on soil water-holding capacity were explored through simulated experiments designed to have soils different in soil texture by artificially altering composition of soil particle fractions. (1) Water holding capacity and specific water capacity of the experimental soils decreased along with increasing soil bulk density. (2) Soil saturated water content, field moisture capacity and wilting coefficient showed the same trend, and negative correlation of power, exponent and exponential function, respectively, with soil bulk density. (3)Soil available water, readily available water and slowly available water contents were also significantly affected. The three water parameters decreased along with increasing soil bulk density, too, showing negative correlation of exponential, power and logarithmic function, respectively, with soil bulk density.

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李卓,吴普特,冯浩,赵西宁,黄俊,庄文化.容重对土壤水分蓄持能力影响模拟试验研究[J].土壤学报,2010,47(4):611-620. DOI:10.11766/trxb200811190404 Li Zhuo, Wu Pute, Feng Hao, Zhao Xining, Huang Jun, Zhuang Wenhua. Simulated experiment on effects of soil bulk density on soil water holding capacity[J]. Acta Pedologica Sinica,2010,47(4):611-620.

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