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玉米在生长发育过程中,除了氮、磷、钾三大营养元素外,还需要硼、锌、锰、钼等多种微量元素。这些元素虽然用量甚微,但无论缺少哪一种,都会成为玉米优质高产的限制因素,因此,生产上必须要重视施用微肥。1.缺锌症状:植株发育缓慢,节间变短,幼苗期和生长前期缺锌,新叶下半部呈现淡黄色乃至白色,以后在叶脉之间看到白色或黄色组织宽带或坏死斑,之后叶片逐渐变黑,有金属光泽,3~5天后植株死亡。生长中后期缺锌,雌穗抽丝期和抽
In the process of growth and development of corn, in addition to nitrogen, phosphorus and potassium three nutrients, but also need boron, zinc, manganese, molybdenum and other trace elements. Although these elements are used in very small quantities, no matter what kind of deficiency, they will become the limiting factor for the high yield and quality of corn. Therefore, we must pay attention to the application of micronutrients in the production. 1. Zinc deficiency symptoms: plant development is slow, internodes shorter, seedling and zinc deficiency in the early growth stage, the lower half of the new leaves appear pale yellow or white, later seen in the veins of white or yellow tissue wide band or necrotic spots, After the leaves gradually black, metallic luster, 3 to 5 days after the plant died. Zinc deficiency growing mid-late, female ear spinning period and smoking