大麦“3414”肥料田间效应探讨

采用测土配方施肥统一推荐的“3414”试验设计，通过肥料效应函数法，对大麦氮、磷、钾肥料效应进行回归分析，得到的产量与施肥量效应函数数学模型为：y=256.16＋22.46x1＋8.1x2＋5.97x3＋0.25x1x2＋0.57x1x3＋0.15x2x3-2.01x1^2-0.5x2^2-0.5x3^2，最高产量为432.4kg/667m^2，最佳施肥量为氮6.3kg/667m^2、磷7.5kg/667m^2、钾6.7kg/667m^2，最佳施肥量产量为409.8kg/667m^2。土壤对大麦的养分供应能力：供氮量为7.92kg/667m^2，供磷量为2.93kg/667m^2，供钾量为7.53kg/667m^2。氮肥利用率47.54%，磷肥利用率6.45%，钾肥利用率17.60%。

Discussion on the Effect of Barley＂3414＂Fertilizer

In the article, ＂ 3141＂ experiment design is used to make regression analysis for the effect of N,P and K Fertilizer on barley by Fertilizer Effect Function Method, the results showed that mathematical model of effect function of yield and fertilizer rate was y=256.16＋22.46x1＋8.1x2＋5.97x3＋0.25x1x2＋0.57x1x3＋0.15x1x3-2.01x1^2-0.5x2^2-0.5x3^2, the peak output was 432.4 kg/667m^2, the optimal combination of P〉K 〉N was 7.5 kg/667m^2, 6.7 kg/667m^2and 6.3 kg/667m^2, the yield of optimal fertilizer rate was 409.8 kg/667m^2. The indigenous nutrient supply capacity of rice soil indicated that the supply amount of nitrogen, phosphorus and potassium were 7.92 kg/667m^2, 2.93 kg/667m^2and 7.53 kg/667m^2respectively, the utilization efficiency of nitrogen fertilizer, phosphorus and potassium fertilizer were 47.54%, 6.45% and 17.60% respectively.