国审‘苏玉糯901’的“3414”肥料效应研究

Study of “3414” Fertilizer Effect on ‘Suyunuo 901'

为摸清本地区土壤养分供给状况,建立玉米施肥指标体系及科学配方,提高玉米综合效益,提升肥料利用率和土壤可持续利用,研究配方施肥对国审‘苏玉糯901’农艺性状和产量的影响,以及施用氮磷钾的肥料效应。通过"3414"回归最优设计原理设置了玉米肥效试验,并采用统计学的方法对试验结果进行分析。结果表明:国审‘苏玉糯901’为耐肥玉米品种,影响其产量的主要因素是N肥,P肥次之,而K肥对产量影响不大。N3P2K2产量最高,N0P0K0产量最低;N2P2K3投入最高,N2P2K0投入最低;N2P2K3投入产出比最低,为2:15,N2P2K0投入产出比最高,为1:19。说明肥料用量增加到一定程度后并不会带来产量的显著提高,但会降低收益率。

In order to find out the soil nutrient supply situation in the Yanjiang Region, establish fertilization index system and scientific formula, improve the comprehensive efficiency of maize and enhance fertilizer use efficiency and sustainable use of soil, the authors evaluated effects of formula fertilization and NPK fertilizer application on the agronomic traits and yield of ＇ Suyunuo 901＇ via optimal design of ＂3414＂ regression. The results indicated that, the ＇Suyunuo 901 ＇ was a fertilizer-tolerant variety, the main factors affecting the yield were N fertilizer, followed by P fertilizer, and K fertilizer had little effect on yield. The yield of N3P2K2 combination was highest, while that of NoPoKo combination was the lowest; the investment of N^P2K3 combination was highest, while that of NzP2Ko combination was the lowest; the input-output ratio of N2P2K3 combination was the lowest, 2：15, while the input-output ratio of NzP2Ko combination was the highest, 1：19. These suggested that the yield could not significantly increase with the fertilizer increasing to a certain extent, but would reduce efficiency.