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过去认为钙镁磷肥的肥效在微碱性条件下不如过磷酸钙。近年来试验结果证明,在微碱性土壤上,钙镁磷肥肥效与过磷酸钙基本相等。分析其原因:施用钙镁磷肥,能促进土壤有效磷的提高,钙镁磷肥在土壤溶液中保持的磷浓度超过植物幼苗临界值,速效磷的浓度大于作物根系吸磷浓度最适值。故弥补了钙镁磷肥开始时有效磷增值低,满足植物对磷的吸收,促进根系发育,植株生长健壮,提高稻谷产量。
In the past that the effectiveness of calcium magnesium phosphate fertilizer in the slightly alkaline conditions than the superphosphate. In recent years, test results show that, in slightly alkaline soil, calcium and magnesium phosphate fertilizer and calcium superphosphate is basically equal. Analysis of the reasons: the application of calcium magnesium phosphate, can promote the increase of soil available phosphorus, calcium and magnesium phosphate in soil solution to maintain the phosphorus concentration exceeds the critical value of plant seedlings, available phosphorus concentration greater than the optimum concentration of crop phosphorus uptake. It makes up for the beginning of calcium magnesium phosphate effective phosphorus added value to meet the plant’s absorption of phosphorus, promote root development, robust plant growth and improve rice production.