外源镧在红壤中的有效性及其对土壤酸度的影响

Availability of Exogenous Lanthanum and its Effect on Soil pH in Red Soil

通过培养试验及盆栽试验研究了外源镧在红壤中的有效性及其对土壤酸度的影响。结果表明 ,土壤有效态镧随外源镧的增加而增加 ,两者呈显著的正相关 ;外源镧在土壤中具有较高的有效性 ,随着时间的延长有效性逐渐降低 ;土壤 p H随外源镧的增加不断降低 ,p H和外源镧及有效态镧均呈显著的负相关 ;

The availability of exogenous lanthanum and its effect on soil pH in red soil were studied.Soil available La increased with increasing exogenous La and there was significantly positive correlation between them.The availability of exogenous La in soil was high and the availability was decreased with prolonged time.Soil pH decreased with increasing exogenous La,pH was significantly negative correlated with exogenous La and available La. Soil ecological environment will be destroyed when excessive La was added into soil.