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国内外研究证明:田间施用磷钾肥料的利用率很低,一般磷肥利用率为10～25％,钾肥利用率为40～60％,其原因是大量可溶性磷钾素往往被土壤固定而成为难溶性的,因而作物无法吸收利用。此外土壤本身也含有大量植物不能直接吸收利用的难溶性磷钾素。据分析计算,如能把土壤中这些难溶性磷钾素设法加以利用,则在不施肥的情况下,磷可供作物营养12～30年,钾可供120～240年,因此活化和利用土壤中难溶性磷钾素,对缓和当前磷钾肥源缺乏和提高农作物产量具有很现实的意义。
Domestic and foreign studies have shown that: the field use of phosphorus and potassium fertilizer utilization rate is very low, the general rate of 10-25% utilization of phosphate, potassium utilization rate of 40-60%, the reason is that a large number of soluble phosphorus and potassium are often fixed by the soil becomes difficult Soluble, so the crop can not be absorbed. In addition, the soil itself contains a lot of plants can not directly absorb the use of insoluble phosphorus and potassium. According to the analysis and calculation, if we can try to utilize these insoluble phosphorus and potassium in the soil, then without fertilization, phosphorus can be used for crop nutrition for 12 to 30 years and potassium for 120 to 240 years, so the soil is activated and utilized In the insoluble phosphorus and potassium, to ease the current lack of phosphorus and potassium sources and improve crop yields has very realistic significance.