【摘要】 以两种磷素水平不同的菜地土壤为研究对象 ,采用培养和盆栽试验法 ,系统研究了磷肥的动态转化、影响因素及其磷肥的效应。结果表明 ,高磷土壤的磷肥固定率明显低于低磷土壤 ,施入土壤中的磷肥大部分在初期被固定。有机肥在培养初期增加磷肥的固定率 ,到后期减小磷肥的固定率。低磷土壤施用磷肥和有机肥 +磷肥两处理具有明显的增产效果 ;而高磷土壤施用磷肥和有机肥 +磷肥两处理无明显增产效果。高磷土壤油菜生物量明显高于低磷土壤。随着种植茬数的增加 ,土壤Olsen -P逐渐减少更多还原

【Abstract】 This paper studied the dynamic transformation of P fertilizer, the influence factors and response of rape to P fertilizer in two different P lever vegetable soils by cultivation and pot experiment. The results are as follows: The fixation rate of phosphorus fertilizer in high P lever soils was distinctly lower than that in low P lever soils. The most phosphorus fertilizer applied was fixed at earlier stage. The rate of fixed P increased in maure + P fertilizer treatment compared with P fertilizer treatment before 40 days in cultivation, but decreased after 40 days. The yield of rape was increased by applying P fertilizer and P + maure in low lever P vegetable soil, but there was no increase in high P lever soil. The yield of rape in high P lever soils was higher than that in low P lever soils. The Olsen P was gradually decreasing with continual cultivation.更多还原