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玉米从出苗到拔节这一阶段为苗期,一般经历20~25天,该时期玉米的主要生长特点是以根系的生长为中心,地上部分的生长较为缓慢。玉米苗期的主要特性是耐旱、怕涝、怕草害。因此,苗期适当干旱,土壤疏松,有利于根系生长。土壤水分过多,通气不良,根系生长受阻,养分转化和吸收受到影响,幼苗瘦弱,严重影响后期生长发育。此阶段田间管理的中心任务是促进根系生长,培育壮苗,做到苗全、苗齐、苗壮,为
Corn seedling stage from emergence to jointing, the general experience of 20 to 25 days, the main characteristics of the growth of corn is the growth of the root system as the center, the growth of the ground part of the relatively slow. The main characteristics of corn seedling is drought, fear of floods, afraid of grass damage. Therefore, proper drought seedling stage, loose soil, is conducive to root growth. Soil moisture is too much, poor ventilation, blocked root growth, nutrient conversion and absorption are affected, thin seedlings, seriously affecting the late growth and development. At this stage field management center mission is to promote root growth, nurturing seedlings, so Miao Quan, Miao Qi, Miao Zhuang,