论文部分内容阅读
白浆土发育在我国温带半湿润条件下,母质为第四纪河湖沉积物,土壤长期处于季节性干湿交替过程,使土壤剖面中铁、锰、铝等矿物元素被还原淋失,粘粒下移,在A及SB层中粘粒显著减少,淀积层中粘粒明显增加。整个剖面中硅铁率、硅铝率和硅铁铝率变化较小。土壤酸度稳定、盐基饱和度在70—90%。没有明显的矿物分解与灰化淀积层,在白浆化过程中,呈现了粘粒非破坏性的机械淋移,或者侧向漂洗作用。
Under the conditions of temperate and semi-humid climate in China, the alluvial white clay developed from the Quaternary Quaternary sediments, and the soil was in a seasonal dry-wet alternation process. The mineral elements such as iron, manganese and aluminum in the soil profile were reduced and leached. Moving down, the clay particles in the A and SB layers decreased significantly, and the clay particles in the sedimentary layers increased significantly. Ferrosilicon rate, Si-Al rate and Fe-Si ratio changed little in the whole section. Soil acidity is stable, the base saturation of 70-90%. There is no obvious deposit of mineral decomposition and ashing, showing non-destructive mechanical leaching of clay particles or lateral rinsing during the whitening process.