锌是对玉米生长发育影响较大的一种微量元素,缺锌则植株发育缓慢,产量和品质都受影响。随着杂交玉米的迅速推广以及施肥水平的提高,缺锌问题愈显突出,成为玉米优质高产的制约因素。 玉米缺锌在苗期即可表现病状,出苗后新芽为白色,俗称“白芽病”。苗期和生长中期缺锌,新生叶的下半部呈淡黄色至白色,叶片长成之后,在叶脉间出现淡黄色斑点或缺绿条纹斑,中脉和边缘之间形成白色或黄色组织宽带或坏死斑,俗称“花白叶”,严重时,叶尖 Zinc is a trace element that greatly affects the growth and development of maize. When zinc is deficient, the growth of plants is slow and the yield and quality are affected. With the rapid popularization of hybrid maize and the improvement of fertilization level, the problem of zinc deficiency has become more and more prominent, becoming the limiting factor of high quality and high yield of corn. Zinc deficient in maize can show the symptom at the seedling stage, and the sprout after emergence is white, commonly known as “white bud disease.” The seedling stage and mid-growth stage are lack of zinc, the lower part of the new leaves are light yellow to white, pale yellow spots or lack of green streaks appear between the veins after the leaves grow, the white or yellow tissue wide band between the veins and the margins Necrosis spots, commonly known as “white flowers”, severe, tip