夏谷氮、磷、钾肥的效应研究

Application Effect of N,P,K Fertilizers on Summer Foxtail Millet

为了探明夏谷生产中氮、磷、钾肥效应和最优施肥参数,本试验采用"3414"肥料效应田间试验,对夏谷高产新品种济谷16的氮、磷、钾肥料效应进行了研究。结果表明:施用氮、磷、钾肥增产效果显著,最高可达32.8%。氮、磷、钾肥间存在明显的交互作用,平衡施肥能显著提高谷子的产量和肥效,氮、磷、钾肥对产量的影响为氮>钾>磷。氮、磷、钾肥的偏生产力随着用量的提高均呈逐渐降低的趋势,平均偏生产力钾>磷>氮。通过建立肥料与产量的三元二次施肥模型得出谷子氮、磷、钾最佳施用量为N 68.53 kg/hm2、P2O5160.62 kg/hm2、K2O 8.96 kg/hm2。因此,济谷16生产中应重视磷肥,适配氮、钾肥。

The ＂3414＂fertilizer field experiment was conducted to investigate the application effect of N,P,K fertilizers on summer foxtail millet Jigu 16 and to optimize the fertilization parameters. The results showed that all fertilization treatments significantly increased the grain yield,and the highest reached up to32. 8%. There were obvious interactions among N,P,K fertilizer and balanced fertilization could significantly improve foxtail millet yield and fertilizer use efficiency. The influence of N,P,K fertilizer on foxtail millet yield was in the order of N 〉K 〉P. The partial factor productivity of N,P,K fertilizer gradually decreased with the increase of fertilizer application levels,and the average partial factor productivity was in the order of K〉 P〉 N. Through establishing three- factor fertilization model,the recommended optimum fertilizing amounts of N,P2O5 and K2O were 68. 53,160. 62,8. 96 kg / hm^2 respectively. It was concluded that the production of Jigu16 should pay attention to P fertilizer with appropriate application of N and K fertilizer.