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为优化青贮玉米施肥技术。以青贮专用型玉米中北410为试验材料,采用裂-裂区设计,研究了大喇叭口期不同施肥组合对青贮玉米鲜草产量的影响。结果表明:(1)利用二次多项式逐步回归法建立的不同施肥组合与青贮玉米鲜草产量的回归模型能较好的模拟试验区N、P、K施肥量与青贮玉米鲜草产量的关系;通过分析得出N、P、K以及N、P的交互作用对青贮玉米鲜草产量影响显著;(2)青贮玉米鲜草产量随施N量和施P量的增加而增加,随K的增加表现出先增加后减少的变化趋势。本试验条件下,大喇叭口期追施N 138 kg/hm2,P2O531.71 kg/hm2和K2O54 kg/hm2时,青贮玉米的鲜草产量达到最大值79.63 t/hm2。
In order to optimize silage corn fertilization technology. Taking silage-specific corn Zhongbei 410 as experimental material, the split-split design was used to study the effects of different fertilization combinations on the yield of silage corn fresh grass. The results showed that: (1) The regression model of different fertilization combinations and silage maize fresh grass established by quadratic polynomial stepwise regression method could well simulate the relationship between N, P and K fertilization and silage corn fresh grass yield; The results showed that the interaction of N, P, K and N, P significantly affected the yield of fresh silage corn; (2) The fresh grass yield of silage maize increased with the increase of N and P, Showing the first increase and then decrease the trend of change. Under the experimental conditions, fresh grass yield of silage corn reached the maximum of 79.63 t / hm2 when topdressing N 138 kg / hm2, P2O531.71 kg / hm2 and K2O54 kg / hm2 for the big bell stage.