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根据玉米对磷钾肥需求量比较高和本省玉米产区土壤普遍存在缺磷缺钾的特点,以及当前肥料供应上氮素肥料比重过高、磷素钾素肥料比例过低的实际情况,浙江省东阳玉米研究所与浙江省化工研究所协作,由浙江省化工研究所以磷铵为基础,生产以高磷高钾为其特点的三种三元复合肥料:复合肥四号、复合肥五号、复合肥六号。其中复合肥四号氮磷钾总含量为59.25％,氮磷钾比例为1∶1.45∶0.86;复合肥五号氮磷钾含
According to the relatively high demand of P and K in corn and the characteristics of P deficiency and K deficiency in the soil of corn producing areas in the province as well as the fact that the proportion of nitrogen fertilizer is too high and the proportion of P and K fertilizers is too low in the current corn supply, Dongyang Corn Research Institute and Zhejiang Institute of Chemical Co-operation, by the Zhejiang Institute of Chemical Industry based on ammonium phosphate to produce high phosphorus and potassium for its characteristics of the three ternary compound fertilizer: compound fertilizer on the 4th, compound fertilizer on the 5th, Compound fertilizer on the 6th. The compound NPF content of 59.25%, N, P and K ratio of 1: 1.45: 0.86; compound fertilizer on the 5th NPK