玉米新品种南校205的施肥模型研究

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

[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。

[ 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/bm2 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.