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在湖北省中晚更新世沉积母质发育的土壤上,观察了6个代表性剖面。并以黄土母质上发育的褐土作为对照,分层取样进行了某些土壤性质的测定。以此分析两种母质上形成的土壤的异同点。两种土壤共同的特征是全剖面质地粘重,粉粘比小。中更新世沉积物上发育的土壤,其盐基指数低于晚更新世沉积物上发育的土壤。而分解系数则相反。中更新世沉积物形成的棕红壤,其粘土矿物以高岭石、水云母为主;晚更新世沉积物形成的黄棕壤,黄褐土,粘土矿物以水云母、蛭石为主,高岭石次之。后者处于脱硅的初级阶段,前者则呈明显的脱硅现象,且土壤中存在的无定形硅前者约为后者的两倍。
In the mid-late Pleistocene sedimentary parent material in Hubei Province, six representative sections were observed. The cinnamon soil developed on loess parental material was used as a control, and some soil properties were determined by stratified sampling. In order to analyze the similarities and differences between the two parent material formed on the soil. The common feature of the two soils is that the whole cross-section texture is viscous and the powder to stick ratio is small. The soils developed on the sediments of the Middle Pleistocene had a lower base index than the soils developed on the sediments of the late Pleistocene. The decomposition coefficient is the opposite. The brown-red soil formed by the Middle Pleistocene sediments is dominated by kaolinite and water mica. Yellow-brown soil, yellow-brown soil and clay minerals formed by late Pleistocene sediments are mainly mica and vermiculite Ridge second times. The latter is in the initial stage of desiliconization, while the former shows obvious desiliconization, and the existence of amorphous silicon in the soil is about twice that of the latter.