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通过多点田间试验和实验室测定研究了河西走廊制种玉米施肥效率,结果表明,制种玉米氮(N)、磷(P2O5)、钾(K2O)养分最佳施用量分别为300 kg hm-2、90 kg hm-2和75 kg hm-2,比盲目施肥节约氮肥33.3%~50.0%,磷肥40%~50%。氮磷钾肥的农学效率分别为7.6、8.0和8.4;氮磷钾吸收量平均为190.0 kg hm-2、84.3 kg hm-2、296.8 kg hm-2;百公斤种子氮磷钾需求量平均为2.46 kg、1.03 kg、3.53 kg;氮磷钾养分生理效率分别为40.6、99.0和28.3;肥料利用率分别为32.4%、21.4%、72.0%,比盲目施肥分别提高了51.4%、76.8%,有效提高了施肥效率。
The fertilization efficiency of maize seed in Hexi Corridor was studied by field experiments and laboratory measurements. The results showed that the optimum nutrient contents of nitrogen (N), phosphorus (P2O5) and potassium (K2O) in maize were 300 kg hm- 2,90 kg hm-2 and 75 kg hm-2, which saved 33.3% -50.0% of nitrogen fertilizer and 40% -50% of phosphate fertilizer than blind fertilizer. The agronomic efficiency of N, P and K fertilizers were 7.6, 8.0 and 8.4, respectively; the average N, P and K uptake was 190.0 kg hm-2, 84.3 kg hm-2,296.8 kg hm-2; kg, 1.03 kg and 3.53 kg respectively. The nutrient efficiency of NPK was 40.6, 99.0 and 28.3, respectively. The fertilizer utilization rates were 32.4%, 21.4% and 72.0% respectively, which increased 51.4% and 76.8% Fertilizer efficiency.