论文部分内容阅读
用过磷酸钙和磷矿粉进行盆栽试验。结果表明，施用过磷酸钙后１个月土壤有效磷迅速提高，但随时间推移而下降，而磷矿粉对有效磷的贡献则与之相反，具体表现出棕红壤比黄棕壤更有利于肥料磷的释放。依据土壤磷（Ｐ）临界值３倍（４２ｍｇｋｇ－１）水平要求，黄棕壤施用２２０ｍｇｋｇ－１、棕红壤施用１２５ｍｐｋｇ－１，对油菜盆栽试验中可获得较高产量，且磷矿粉的肥效优于过磷酸钙。
Pot experiments with superphosphate and phosphate rock powder. The results showed that the soil available P increased rapidly at one month after applying the superphosphate, but decreased with the passage of time. However, the contribution of the phosphate rock to the available P was the opposite, indicating that the reddish brown soil was more favorable than the yellow brown soil Fertilizer phosphorus release. According to the level of soil phosphorus (P) critical value of 3 times (42mgkg-1), yellow brown soil application of 220mgkg-1, red brown soil application of 125mpkg-1, rape pot experiment can obtain higher yield and phosphate fertilizer efficiency Better than superphosphate.