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施等氮量225 kg/hm2条件下,研究不同施肥方式对夏玉米产量及其构成因素、不同生育期植株对养分吸收及0~20 cm和21~40 cm土壤速效养分含量的动态变化,明确不同施肥方式对夏玉米的增产效应。结果表明,施肥均不同程度增加夏玉米产量,增产16.48%~48.15%,收获指数增加7.81%~15.52%。缓控释肥处理对夏玉米产量提高作用明显,最高达9 697.50 kg/hm2。缓控释肥处理在玉米不同生育期土壤养分残留量呈低-高-低的趋势,能较好协调土壤养分供应与夏玉米地上部养分吸收,氮肥农学效率、氮肥偏生产力和氮肥表观利用率均较高,利于获得高产。
Under nitrogen application rate of 225 kg / hm2, the dynamic changes of summer maize yield and its components, nutrient uptake by different growth stages and soil available nutrient contents at 0 ~ 20 cm and 21 ~ 40 cm were studied under different fertilization modes. Effect of Different Fertilization Methods on Summer Corn Yield. The results showed that fertilization increased the yield of summer maize to some extent, increasing yield by 16.48% -48.15% and harvesting index by 7.81% -15.52%. Slow-release fertilizer treatment significantly increased the yield of summer maize up to 9 697.50 kg / hm2. Controlled-release fertilizers tend to have low-high-low soil nutrient residues at different growth stages of maize, which can better coordinate the supply of soil nutrients and nutrient uptake of summer maize, agronomic efficiency of nitrogen fertilizer, partial productivity of nitrogen fertilizer and apparent nitrogen fertilizer utilization Rates are higher, conducive to high yield.