控释氮肥对鲜食玉米吸氮量及氮素效率的影响

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。

Effect of Controlled Release Nitrogen Fertilizer on the Nitrogen Uptake and Nitrogen Efficiency of Fresh Consumed Maize

Effect of controlled release nitrogen fertilizer on the biological characteristics,yield and nitrogen efficiency of fresh consumed maize were studied by field experiments.The results showed that conventional nitrogen and controlled release nitrogen fertilizer did not have significant effect on promoting vegetative growth and commodity benefits of fresh consumed maize.Effect of 70% controlled release nitrogen fertilizer on plant height,leaf area,plant fresh weight as well as commodity rate were optimal,which increased by 4.26%,8.16%,4.56%,5.60% and 5.15% compared with the control.Especially the first-class rate increased 18.6% compared with the control.The Nitrogen uptake of conventional nitrogen was 411.36kg/hm2,and the Nitrogen efficiency was 34.11%.The effect of corn borer controlling reached 100%.After harvest,the soil nitrogen of controlled release nitrogen fertilizer was the highest.Controlled release nitrogen fertilizer released slowly.