四川白鳝泥的发生特点及肥力特征

白鳝泥是四川盆地尤其西部广泛分布的一类耕地土壤,以田为主。白鳝泥是其基本形成过程,实质是铁、锰的还原性淋溶。由古富铝风化壳形成之白鳝泥,一般质地粘重,持水力强,铁、锰淋失量大,白鳝泥层厚。湿害和供肥能力低是其突出的生产问题。

THE PROPERTIES OF GENESIS AND FERTILITY OF SICHUAN BLEACHED SOIL

Arable bleached soils are widely distributed in Sichuan basin, especialy in western part。Most of them are paddy soils. Bleaching is their basic process of formation. The key crux is the reductive bleaching of iron and manganese。The properties of the bleached soil formed from paleo—allitic weathering crus are heavy texture, thick albic horizon, strong water—holding powerand bleaching of iron and manganese。The obvious problems of the soil are wet and low ability of nutrient supply。