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通过田间试验示范研究了控释氮肥对鲜食玉米生物学性状、产量性状以及氮素效率的影响。结果表明,常规氮素与等养分控释氮肥对鲜食玉米的营养生长及商品效益没有表现出明显的促进作用,70%控释氮肥对鲜食玉米的株高、茎粗、叶面积、植株鲜重以及商品率等影响最优,与对照相比分别增加4.26%、8.16%、4.52%、5.60%和5.15%,尤其是一等率与对照相比增幅达到18.6%。鲜食玉米的吸氮量以及氮素效率以常规氮素最高,分别达到411.36 kg/hm2和34.11%,对玉米螟的防效达到100%。鲜食玉米收获后土壤氮素养分以控释氮肥为最高,控释氮肥表现出了一定的缓效性。
The effects of controlled release nitrogen fertilizer on the biological characters, yield characters and nitrogen efficiency of fresh corn were studied through field experiments. The results showed that conventional nitrogen and equal nutrient controlled release N fertilizers did not significantly promote the vegetative growth and commercial benefits of fresh corn. The 70% controlled release nitrogen fertilizer had no significant effect on plant height, stem diameter, leaf area, Fresh weight and commodity rate were the best, which increased by 4.26%, 8.16%, 4.52%, 5.60% and 5.15% respectively compared with the control, especially the first-class rate increased by 18.6% compared with the control. The nitrogen uptake efficiency and nitrogen efficiency of fresh corn were the highest with conventional nitrogen reaching 411.36 kg / hm2 and 34.11%, respectively. The control effect on corn borer reached 100%. After the fresh corn was harvested, the soil nitrogen nutrient controlled-release nitrogen fertilizer was the highest, and the controlled-release nitrogen fertilizer showed a certain degree of slow-release effect.