水田土壤剖面磷素分布特征

The characteristic of phosphorus distributed in profile of the paddy field

对水田土壤剖面分层采样分析,研究了磷素在水田土壤剖面中的分布特征。结果表明水田土壤剖面各层中全磷、有机磷、速效磷均有一定量的积累,并且表现出土壤剖面下层磷素增加的趋势;秋季土壤剖面中有机磷占全磷的比例有高于春季比例的特点。

Samples analyses to the soil profile of paddy field,have studied the distribution characteristic of phosphorus in the soil profile.The result indicates that total P.,organic P.,and available P.have trend to distribute in deep section in soil profile.The accumulation of P in 80～100 cm of soil profile is higher than in 0～20 cm.The proportion of organic P.to total P.is higher in autumn than spring