玉米田培土不宜过早过深玉米地块培土得当能起到防止倒伏，便于灌溉与排水，减轻草害和提高肥效等作用，达到增产的目的。如果培土过早过深，则会适得其反。据调查，在玉米开始拔节时，培土１５～１８厘米深，到玉米蜡熟期植株表现早衰、倒伏、籽粒灌浆不适、干粒重下降，... Maize field soil should not be too early too late Cultivation of corn plots properly play a role in preventing lodging, easy irrigation and drainage, reduce grass damage and improve fertilizer efficiency, to achieve the purpose of increasing production. If the soil is too deep too early, it will be counterproductive. According to the survey, when the corn starts to join, the soil is 15 to 18 centimeter deep, and the performance of the plant in the waxy corn stage is premature, lodging, grain filling discomfort, and the dry weight is decreased ...