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根据第四纪红粘土起源物的成因和属性及其对土壤发育特性影响的大小,在中亚热带丘陵地区可划分四个土属:(1) 硅铁质残积红壤;(2) 硅铁质红壤;(3) 硅铁质网纹红壤;(4)硅铁质砾石红壤。划分土种的原则方案是:(1) 同土属内土体构型相同的土壤;主要根据表层肥力的量级差异划分土种;(2) 土体构型不同的土壤,无论表土层的肥力状况如何,都应划分为不同土种;(3) 耕种红壤土种的划分,主要视改土培肥及耕作管理措施的强度及其表现在耕作层(含亚耕层)的熟化度高低所决定。低丘地区常见的红壤组合型式有:(1) 完整迭合弱侵蚀型;(2) 残留链状弱侵蚀型;(3)倒置加积强侵蚀型;(4) 斑状水化平直型;(5) 垄沟状强侵蚀型;(6) 同源母质对称型;(7)异源母质对称型;(8) 异源母质带状覆盖型;(9) 环状侵蚀型。
According to the origin and characteristics of Quaternary red clay origin and its influence on soil development characteristics, four soil genera can be divided in the subtropical hilly region: (1) ferrosilicate residual red soil; (2) ; (3) ferrosilicite red soil; (4) ferrosilicon gravel red soil. The plan of dividing the soil seed is: (1) Soil with the same soil structure in the soil; Soil is classified mainly according to the order of the surface soil fertility; (2) Soil with different soil types, regardless of the topsoil Soil fertility status should be divided into different types of soil; (3) the division of cultivated red soil species, mainly depending on the soil fertility and tillage management measures of intensity and performance in the tillage layer (including sub-tillage layer) Decided. The common types of red soil in the hilly region are: (1) Completely superimposed weak erosion type; (2) Residual chain weak erosion type; (3) Inverted plus strong accumulation type; (4) (5) Ditch-shaped strong erosion type; (6) Symmetrical type of homologous mother substance; (7) Symmetrical type of heterologous mother substance; (8) Heterotypic coverage of heteromorphism;