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近年来,华北地区的农民施用钙镁磷肥的数量渐渐增多,但普遍反映其肥效不高。究其原因,主要是施用技术不当所致。一、钙镁磷肥的特点钙镁磷肥是一种弱酸溶性磷肥,只有在微酸或酸性环境下才能有效地发挥肥效。同时钙镁磷肥又是一种多元素肥料,除含14～20％的五氧化二磷外,还含有25～30%的氧化钙、30％左右的氧化硅、15～18％
In recent years, the number of farmers in North China using calcium magnesium phosphate gradually increased, but generally reflect its low efficiency. The reason is mainly due to improper application of technology. First, the characteristics of Ca-Mg phosphate Ca-Mg phosphate is a weak acid-soluble phosphate fertilizer, and only slightly acidic or acidic environment can effectively play a fertilizing effect. At the same time, Ca-Mg phosphate is a multi-element fertilizer, which contains 25-30% of calcium oxide, 30% of silicon oxide and 15-18% of phosphorus in addition to 14-20% of phosphorus pentoxide.