In the corn field, "white seedlings" often appear in the seedling stage, which is caused by zinc deficiency. Generally, from the 4-leaf stage, the leaf color of the base of the new leaves becomes yellowish white. In the 5-6 leaf stage, there are pale yellow and light green stripes between the 1-3 leaves of the heart leaf, but the veins are still green, and purple stripes appear at the base. After 10-15 days, the purple color gradually turns yellowish white, and the leaf flesh becomes thinner. It is "white seedling". In severe cases, the whole field is white. The zinc-deficient corn plants are short, the internodes are short, the leaf pillows overlap, the heart leaves grow slowly, and the flat tops appear. In severe cases, the white leaves gradually dry up and even the whole plant dies.
Prevention
Rational fertilization
organic
The fertilizer must be decomposed and treated harmlessly . Every 667 square meters, about 2500 kilograms of high-quality organic fertilizer, about 1.5 kilograms of zinc sulfate, mixed with organic fertilizer, combined with soil preparation, applied to the soil .Scientific topdressing is mainly topdressing outside the roots. This is a good way to apply zinc fertilizer after the discovery of corn "white seedlings". The concentration and dosage are 40-50 kg of zinc sulfate solution with a concentration of 0.1%-0.2% per 667 square meters. Since the jointing of the corn, it is sprayed once every 10-15 days, even spraying 2-3 times. More obvious.
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