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用腐植酸钠、尿素、磷酸氢二钾、磷酸二氢钾等原料,采用回归旋转组合设计对腐植酸液肥饱和复配进行调整,以期提高腐植酸液肥中腐植酸和营养元素的含量。试验结果表明,饱和复配腐植酸液肥其营养元素总量(N-P2O5-K2O)稳定在350.25g/L以上的组合方案为:配置100mL液肥,需质量分数为50%腐植酸钠30.98～33.87mL,磷酸二氢钾15.34～16.51g,尿素48.89～50.22g,磷酸氢二钾12.75～16.08g。
With humic acid sodium, urea, potassium hydrogen phosphate, potassium dihydrogen phosphate and other raw materials, the use of regression rotary combination design of humic acid liquid fertilizer to adjust the saturation compound in order to improve the humic acid humic acid and nutrient content. The results showed that the combined scheme of stabilizing the content of total N (N-P2O5-K2O) in the saturated compound humic acid liquid fertilizer above 350.25g / L was as follows: 100mL liquid fertilizer was used, and the mass fraction of 50% sodium humic acid 30.98 ~ 33.87 mL, potassium dihydrogen phosphate 15.34 to 16.51 g, urea 48.89 to 50.22 g, and dipotassium hydrogen phosphate 12.75 to 16.08 g.