论文部分内容阅读
在贵阳市乌当区采集了白云岩、石灰岩、钙质紫色砂页岩等9种母质(岩)上发育的土壤样品763个,分别进行了土壤主要理化性质的测定和差异性分析。结果表明不同母质(岩)发育的土壤理化性质具有很大的差异:红色粘土、老风化壳和页岩上发育的土壤pH值均为酸性至强酸性,有机质和CEC含量中等,土壤质地较粘重;石灰岩、白云岩和钙质紫色砂页岩上发育的土壤pH值为中性至微碱性,有机质和CEC含量较高,质地较为适中;砂页岩和河流冲积物上发育的土壤pH值为酸性至中性,其余理化性质为中等水平;砂岩发育的土壤pH值为强酸性,其余理化性质均较差。
763 soil samples were collected from 9 parent materials (dolomite, limestone, calcareous purple sandstone) collected in Wudang District of Guiyang City. The main physical and chemical properties of the soil were determined and the differences were analyzed. The results showed that there were great differences in the physical and chemical properties of soils derived from different parent materials (rocks). The pH value of soils developed on red clay, old weathering crust and shale was acidic to strongly acidic with medium organic matter and CEC content, The pH value of soil developed on limestone, dolomite and calcareous purple sandstone shale is neutral to slightly alkaline with high organic matter and CEC content and moderate texture. Soil pH developed on sand shale and river alluvium The value of acidic to neutral, the rest of the physical and chemical properties of medium level; sand soil pH value is strongly acidic, the rest of the physical and chemical properties are poor.