试验以新牧4号紫花苜蓿为材料,设置4个处理,研究不同氮、磷、钾肥配比施肥对苜蓿的产量、品质的影响。试验结果表明,不同施肥处理对苜蓿产量、品质影响较大。其中,N₂P₁K₁组合的干草产量最高,为24.00 t/hm²,N₃P₁K₁次之;粗蛋白和粗灰分含量最高的是N₁P₁K₁,分别为17.69%、8.43%;酸性洗涤纤维最低的是N₂P₁K₁,为33.035%,与不施肥差异显著。综合分析认为,试验区二年生苜蓿的最佳施肥配比是N2P1K1(120 kg·hm²尿素+90 kg/hm²过磷酸钙+60 kg/hm²硫酸钾)。

The effects of nitrogen, phosphorus and potassium fertilizer on the yield and quality of alfalfa were studied based on four of Xinmu No.4 Medicago sativa L.. The results showed that different fertilization treatments had great effects on the yield and quality of alfalfa. The hay yield of N₂P₁K₁ was the highest, which was 24.00 t·hm²,and N₃P₁K₁ was second. The highest content of crude protein and coarse ash was N₁P₁K₁,17.69% and 8.43% respectively. The lowest acid washing fiber was N₂P₁K₁, which was significantly different from that of no fertilization. It was thought that, by comprehensive analysis, the optimum fertilizer for two year of alfalfa was N₂P₁K₁(120 kg/hm² urea +90 kg/hm² superphosphate +60 kg/hm² potassium sulfate).