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玉米中耕管理把关玉溪地区农科所６５３１００王志学玉米高产栽培，在把好出苗关后，中耕管理要把好四关：一是把好追肥关。玉米长到５～７片展开叶时，要尽快追施提苗肥，亩用４０千克碳铵、２０千克普钙兑水浇施；玉米１１～１２片展开叶时，亩用尿素４０千克兑水浇施，...
Guanzhong 655300 Wang Zhixue High-yielding cultivation of maize, after the emergence of good seedling, cultivating management should be a good four: First, the good top-dressing. Corn grow to 5 to 7 leaves, as soon as possible topdressing Miaofei, mu with 40 kg of ammonium bicarbonate, 20 kg of calcium against water pouring facilities; corn 11 to 12 leaves, acres of urea 40 kg against Watering facilities, ...