| 四川省三种紫色土壤持水性的研究 |
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| 引用本文： | 张卓如,王国英.四川省三种紫色土壤持水性的研究[J].西南农业大学学报,1989,11(1):1-6. |
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| 作者姓名： | 张卓如 王国英 |
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| 作者单位： | 西南农业大学土化系，西南农业大学土化系 |
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| 摘 要： | 四川盆地3种紫色土的土壤水吸力与土壤含水量呈负相关,土壤水随吸力增加而降低。土壤含水量主要受土壤有机质、土壤质地和土壤胶体性质的影响。土壤持水曲线,通常仅能反映土壤持水量的多寡,但是结合低吸力段土壤水容量的研究,能更好地评价土壤的持水性能和水分的有效程度。3种土壤的持水能力是:灰棕紫泥>红棕紫泥>红紫泥。在<0.03MPa 时,土壤分的有效性是:红紫泥>灰棕紫泥>红棕紫泥。3种土壤水分的渗透力是:灰棕紫泥>红棕紫泥>红紫泥;土壤水分蒸发强度是红棕紫泥>灰棕紫泥。
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| 关 键 词： | 紫色土 土壤 持水性 |
STUDIES ON THE CHARACTERISTICS OF MOISTURE RETENTION OF THREE KINDS OF PURPLE SOIL IN SICHUAN AREA |
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| Zhang Zhuoru Wang Guoying.STUDIES ON THE CHARACTERISTICS OF MOISTURE RETENTION OF THREE KINDS OF PURPLE SOIL IN SICHUAN AREA[J].Journal of Southwest Agricultural University,1989,11(1):1-6. |
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| Authors: | Zhang Zhuoru Wang Guoying |
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| Abstract: | Soil water suction of three kinds of purple soil in Sichuan area isnegative correlated with soil water content.Soil water content is decre-ased with the increase of soil water suction.The influertial factors ofthe soil water-retention characters in lower suction are related to theorganic matter,texture and colloided properties of soils.Soil water-retention curve only shows that the quantity of water,but specific water capacity(SWC)may be used to correctly evaluate thesoil water-retention characters and availahility of soil moisture.Soilwater-retention characters can be summarized as.gray-brown purplesoil>reddish-brown purple soil>reddish purple soil.Under the low(0.03MPa)water suction,available order of soil moisture is:reddish-purplesoil>gray-brown purple soil>reddish-brown purple soil. |
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| Keywords: | purple soil soil water retention Sichuan |
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