玉米新品种南校205的施肥模型研究

目的]探讨玉米新品种南校205施肥模型。方法]采用三元二次通用旋转组合设计3因素5水平20个处理,通过试验建立数学模型。结果]南校205最佳经济效益施肥方案为：单产7 304.2 kg/hm2,纯收益10 287.40元/hm2,施N量216.84 kg/hm2、P2O5111.97kg/hm2、K2O243.97 kg/hm2 南校205最高产量施肥方案为：单产7 466.2 kg/hm2,纯收益9 995.92元/hm2,施N量300.67 kg/hm2、P2O5146.90 kg/hm2、K2O240.63 kg/hm2。经济效益最佳施肥方案比最高产量施肥方案产投比高。N与P2O5、N与K2O的互作分别达到显著、极显著水平。结论]采用最佳经济效益施肥方案,比最高产量施肥方案收益增加291.48元/hm2,效果良好。种植南校205时要特别注意磷、钾肥对氮肥施用效果的影响。

Study on the Fertilization Mode for New Breed of Corn-Nanxiao 205

Objective] The study aimed to establish the model of fertilization for new breed of corn-Nanxiao 205.Method] The mathematics model was established by secondary rotatable regression design and three factors five levels experiment.Result] The results showed that the optimum economic benefit fertilizer constitute for Nanxiao 205 was 216.84 kg/hm2 of nitrogen,111.97 kg/hm2 of P2O5 and 243.97 kg/hm2 of K2O.Under such condition,the yield of corn was 7 304.2 kg/hm2.And the income after deducting the cost of fertilizer was up to 10 287.40 yuan/hm2.The maximum yield fertilizer constitute for it was 300.67 kg/hm2 of nitrogen,146.90 kg/hm2 of P2O5 and 240.63 kg/hm2 of K2O.And the yield of corn was 7 466.2 kg/hm2.And the income after deducting the cost of fertilizer was 9 995.92yuan/hm2.The former was higher than the latter in output/input.The interaction between N and P2O5,N and K2O was very obvious.Conclusion] The optimum economic benefit fertilization model was very remarkable.Therefore,the effect of phosphate and potash fertilizer on nitrogen application should be specially paid attention to during the planting of Nanxiao 205.