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现介绍一种简便的标准化肥折合其他化肥的计算方法:标准氮肥(含氮21%),一般指硫酸铵;标准磷肥(含磷12%),一般指过磷酸钙;标准钾肥,有硫酸钾、氯化钾,含氧化钾均在60%左右。目前氮、磷化肥种类繁多,含量差异很大,碳酸氢铵含氮17%,尿素含氮47%,过磷酸钙含磷11%左右,磷酸二铵含磷42%以上、同时还含氮18%。还有其他复合肥,含量不一。按小麦中产田每亩需标准氮肥50公斤,需标准磷肥70公
Is now introduced a simple method of standard fertilizer equivalent to other chemical fertilizers: Standard nitrogen fertilizer (nitrogen 21%), generally refers to ammonium sulfate; standard phosphate fertilizer (phosphorus 12%), generally refers to superphosphate; standard potassium fertilizer, potassium sulfate , Potassium chloride, potassium oxide are about 60%. Currently nitrogen and phosphorus fertilizers a wide range of content varies greatly, ammonium bicarbonate nitrogen 17% nitrogen urea 47%, superphosphate phosphorus 11%, more than 42% phosphoric acid phosphate 42%, but also nitrogen 18 %. There are other compounds, different levels. According to the field of wheat yield standard fertilizer 50 mu per acre, standard fertilizer required 70 km