玉米田的培土

• 作 者: 陈光
• 出 处: 农村科学实验
• 发表日期: 1998年06期
• 关键词: 防止倒伏 灌水条件 熟期 低洼潮湿 大喇叭口期 始期 卜山 茎腐病 吸水作用 气生根

玉米田培土能起到防止倒伏,便于灌溉与排水,减轻草害和提高肥效的作用。尤其是低洼潮湿地,培土可提高土温,达到增产的目的。但干旱和无灌水条件的地块不宜培土。如果培土过早过深,则适得其反。据调查,在玉米开始拔节时,培土15—18厘米深,到腊熟期植株会早衰、倒伏、灌浆不好、千粒重下降,比不培土的减产30%。这是因为:①

Corn field soil can play to prevent lodging, easy irrigation and drainage, reduce grass damage and improve fertilizer effect. Especially low-lying wet land, earthwork can increase soil temperature, to achieve the purpose of increasing production. However, it is not suitable for the land to be cultivated in the arid and non-irrigated conditions. If the soil too early too early, then counterproductive. According to the survey, when the corn began to join, the soil was 15-18 cm deep and the plants in the wax maturity stage would prematurely fall, lodging and grouting would not be good, and the grain weight would drop. The yield would be 30% less than that of the non-cultivated soil. This is because: ①