一、及时补苗、间苗、定苗玉米顶土出苗后,需及时查苗,发现缺苗严重,应立即进行补苗,采取移栽补苗或催芽补种的方法。间苗在3叶期进行,定苗在4—5叶展开时完成,拔除小株、弱株、病株、混杂株,留下健壮植株。二、灌溉玉米拔节后进入生长旺盛阶段,对水分的需求量增加,尤其是大喇叭口期发生干旱(俗称卡脖旱),将影响抽雄和小花分化;抽雄开花期玉米需水量最多,是玉米需水的临界期,此期干旱将影响玉米散 First, timely fill Miao, Miao Miao, Dingmiao top soil after emergence of corn, the need to promptly check the seedlings and found that the lack of seedlings serious, should immediately make up for seedlings, to take the transplant seedling or sprouting replanting methods. Mature seedlings in the 3 leaf stage, Dingmiao 4-5 leaf expansion to complete, remove small, weak, diseased, mixed strains, leaving robust plants. Second, after the irrigation of corn into the vigorous growth stage after jointing, the demand for water increased, especially in the big trumpet period of drought (commonly known as card neck dry), will affect tasseled and floret differentiation; tasseled flowering maize water demand is corn Water critical period, this drought will affect corn scattered