肥料配施对苜蓿干物质产量的影响

Effects of Mixed Fertilizer Applications on Hay Yield of Alfalfa

[目的]研究不同元素合理配施对苜蓿产量的影响。[方法]试验采用四元二次回归正交旋转组合设计,研究了硫酸钾、氯化铵、过磷酸钙和氧化镁对苜蓿干物质产量的影响。[结果]试验肥料对苜蓿干物质产量的影响顺序为硫酸钾>氯化铵>氧化镁>过磷酸钙。其中,硫酸钾对苜蓿干物质产量有显著影响,硫酸钾和氧化镁互作对产量影响显著。[结论]获得苜蓿干物质产量为19 224.6 kg/hm2以上的优化方案为硫酸钾163.235～181.679 kg/hm2;氯化铵155.877～174.258 kg/hm2;过磷酸钙566.177～632.924 kg/hm2;氧化镁30.060～33.628 kg/hm2。

[Objective] To study the effects of combined application of different elements on alfalfa hay yield.[Method] Potassium sulfate,ammonium chloride,superphosphate and magnesium oxide were applied to alfalfa field in the experiment,and quaternary quadratic regression orthogonal combination was used to examine the effects of the experiment factors on hay yield of alfalfa.[Result] The order of targets based on the effects on hay yield is as follows： potassium sulfate ammonium chloride magnesium oxide superphosphate.Among them,the potassium sulfate had a significant impact on alfalfa hay yield.The interaction between potassium sulfate and magnesium oxide also had a significant impact on alfalfa hay yield.[Conclusion] The optimal cultivation measures for alfalfa hay yield of more than 19 224.6 kg/hm2 are as follows： potassium sulfate,163.352-181.679 kg/hm2;ammonium chlorie,155.877-174.258 kg/hm2;superphosphate,566.177-632.924 kg/hm2;and magnesium oxide,30.060-33.628 kg/hm2.