玉米对锌是敏感作物,缺锌会发生明显的生理病害。症状表现为:玉米苗期出现紫红苗、白苗,生长迟缓,5～6叶时出现花叶症;拔节后,根部变黑,严重者叶片呈半透明白色网状,茎秆脆弱,易倒伏,植株矮缩,主茎上细下粗呈“圆锥型”。玉米缺锌会引起代谢失调,造成根系不发达,叶簇生,严重阻碍营养生长,使玉米减产。 Corn is sensitive to zinc crops, zinc deficiency will occur obvious physiological diseases. Symptoms are: maize seedlings appear purple seedlings, white seedlings, growth retardation, 5 to 6 leaf mosaic disease appear; after jointing, the roots darken, severe leaves were translucent white mesh, stalk fragile, easy to lodging , Plant dwarf, the main stem fine detail was “conical”. Zinc deficiency in maize can cause metabolic disorders, resulting in underdeveloped roots and leaf clusters, which seriously hinder nutrient growth and reduce maize yield.