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《点题服务》栏目编辑: 我想了解两个问题:①普钙与钙镁磷肥各有何优点,在什么土壤施用效果最合适?②我家住山区湖北秭归县水田坝乡,使用哪种磷肥效果好? 读者 吴前山 吴前山同志: 您的信由编辑部转我,现解答如下: 在我国农业生产中常用两种磷肥:一是过磷酸钙又称普钙,二是钙镁磷肥。普钙是用硫酸分解磷矿粉制成的,是灰白色或深灰色的粉状或粒状物,含有效磷(P_2O_5)12％～18％,有酸味,易吸潮结块,溶于水,属水
I would like to know two questions: ① what are the advantages of each type of calcium and magnesium phosphate fertilizer and what is the most suitable soil application type? ② Which type of phosphate fertilizer effect is used in my paddy field in Zigui County, Hubei Province? Readers 吴 前山 吴 前山 Comrade: Your letter by the editorial department turn me now answer as follows: Two kinds of phosphate fertilizer commonly used in agricultural production in our country: First, also known as superphosphate calcium, calcium magnesium phosphate fertilizer. Calcium is made of sulfuric acid decomposition of phosphate rock powder is gray or dark gray powdery or granular material containing 12% ~ 18% phosphorus (P_2O_5), sour, easy to absorb moisture agglomeration, soluble in water, Is a water