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田间试验结果表明,在缺磷的石灰性土壤上过磷酸钙增产效果显著;枸溶性钙镁磷肥增产效果很低,不宜在石灰性土壤上直接施用,但混有半数以上过磷酸钙的钙镁磷肥可以在缺磷石灰性土壤上施用。本文还讨论了不同磷肥品种的相对肥效表示方法。
The results of field experiments showed that the production of superphosphate was significantly increased in phosphorus-deficient calcareous soil. The yield-increasing effect of citric-soluble calcium-magnesium phosphate fertilizers was very low and should not be applied directly to calcareous soil. However, more than half of calcium-magnesium superphosphate Phosphate fertilizers can be applied on phosphate-poor calcareous soils. This article also discussed the relative fertilizer efficiency of different types of phosphate fertilizer.