1. The phenomenon of corn stalks occurs frequently in China's corn planting areas. When nitrogen supply is sufficient and phosphorus and potassium are deficient, the leaves are densely green, the stems and leaves are luxuriant, the sugar metabolism in the body is blocked, and the sugar in leaves and stems. Increasing, the sugar that is turned to the ear is correspondingly reduced, so that the ear cannot develop the ear of the ear due to insufficient nutrition, forming an empty stalk.
2. The prevention and control measures are mainly balanced fertilization. It is necessary to apply nitrogen scientifically, apply phosphorus and potassium fertilizers, and supplement trace elements such as boron and zinc to promote flower development. It is required to apply 25-30 kg of calcium phosphate per acre and 5-7.5 kg of potassium fertilizer, all of which are applied as a base fertilizer at one time. Nitrogen topdressing should lightly apply seedling fertilizer, skillfully extract energy, reapply and attack fertilizer, and apply granular fertilizer. Granular fertilizer can be sprayed with 0.2% potassium dihydrogen phosphate and 1%-2% urea solution once a week, once every 50-60 kg of nutrient solution per acre, even spray 2-3 times to extend the functional period of the leaf. Promote roots and strong stalks to meet the nutrient requirements of young spike differentiation.
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