| 摘要 |
Prodn. of liq. NPK fertilisers is effected by mixing together stable clear aq. solns. of Ca(NO3)2, Mg(NO3)2, KNO3/HNO3, KHSO4, K2HPO4, NH4NO3 and K2CO3, with addn. of H2O as required. The Ca(NO3)2 soln. contains 6-10 wt% NO3N, 0-4% NH3N and 12-20% CaO. The Mg(NO3)2 soln. contains 5-9% No3N and 8-12% MgO. The KNO3/HNO3 soln. contains 8-12% No3N and 0.5-8% K2O. The KHSO4 soln. contains 8-12% K2O and 13-25% SO3. The K2HPO4 soln. contains 20-30% K2O and 15-35% P2O5. The NH4NO3 soln. contains 7-14% NO3N and 7-14% NH3N. The H2CO3 soln. contains 25-35% K2O. |
