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在石灰性土壤上施用过磷酸钙,由于土壤性质的特点,有利用率极低的说法。在这种情况下,许多研究者认为,把过磷酸钙制成粒肥或与有机质混合制成有机—无机粒肥,减少可溶性磷肥与土壤之接触面,以提高磷肥的利用率。H.C.阿夫道宁研究结果认为粒状过磷酸钙的肥效为粉施的4倍。但对于这一问题的意见仍是不一致的。A.B.索可洛夫认为粒肥效果与土壤类型有密切关系。酸性及强酸性土壤,
The use of superphosphate in calcareous soils, due to the nature of the soil, has a very low utilization rate. In this case, many researchers believe that the superphosphate made of granular fertilizer or mixed with organic matter made of organic - inorganic grain fertilizer to reduce the soluble phosphate fertilizer and soil contact surface, in order to improve the utilization of phosphate fertilizer. H.C. Adu Dudin study results that the effect of granular calcium superphosphate powder application of 4 times. However, the opinions on this issue are still inconsistent. A.B. Sokolov believes that the effect of grain-filling is closely related to soil type. Acidic and strong acid soil,