磷肥在石灰性土壤上具有明显的增产效果,但磷肥利用率一般较低,通常认为这是由于水溶性磷大部分呈不可逆态被固定。磷肥有无后效及后效持续多久,众说纷纭。经5年定位试验表明,磷肥在石灰性土壤上具有明显的后效,其后效大小及持续 Phosphate fertilizers have obvious yield increasing effect on calcareous soil, but the utilization rate of phosphate fertilizers is generally low, which is generally considered to be due to the irreversible immobilization of water-soluble phosphorus. Phosphate fertilizer after-effects and after-effects for how long, different opinions. After 5 years of positioning test showed that the phosphate fertilizer in the calcareous soil has significant after-effects, after-effect size and duration