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黄泛平原广泛分布的潮土(石灰性冲积土或耕种浅色草甸土),80%以上的土壤,耕层有机质含量少于1.0%,土壤熟化度低,结构性差,所以,土壤的理化特性,主要受土壤颗粒组成(或土壤质地)所决定.近年来,我们曾对不同质地土壤的水分特性进行了一些研究,特别是在土壤物理性粘粒含量与土壤几个水分常数(即最大吸湿量、凋萎湿度和渗透系数)的关系方面作了一点工作.虽然,国内外的一些土壤学者认为土壤水分常数并非一个常数,但在目前,仍有不少土壤学者把这些土壤水分常数应用于农业生产,作为制订土壤水分管理措施的主要依据.为了掌握黄泛平原不同质地土壤的水分特性,本文着重探讨了不同质地土壤的颗粒组成特点;土壤物理性粘粒含量与最大吸湿量、凋萎湿度和渗透系数的关系.
Over80% of the soils distributed in the Yellow River plain are alluvial soils (alluvial alluvial soil or light-colored meadow soil), soil organic matter content is less than 1.0%, soil maturity is low and the structure is poor. Therefore, The characteristics are mainly determined by the composition of the soil particles (or the texture of the soil). In recent years, we have conducted some studies on the moisture characteristics of soils with different textures, especially in the relationship between the soil clay content and several soil moisture constants Moisture content, withered humidity and permeability coefficient) .Although some soil scientists at home and abroad think that the soil moisture constant is not a constant, but at present, there are still many soil scientists to apply these soil moisture constant In order to master the water characteristics of soils with different textures in the Yellow River Plain, this paper focuses on the characteristics of the grain composition of soils with different textures, the relationship between the content of soil clay and the maximum moisture content, Wumidity and permeability coefficient of the relationship.