Answer: Albino seedlings are a common seedling disease in maize and there are two manifestations in production. One is the appearance of white seedlings when the seedlings are unearthed. This is a hereditary phenomenon called lethal gene albino seedlings. It is unable to live autonomously due to lack of chlorophyll and soon dies. Another kind of albino seedling usually begins at the 4th leaf stage of maize, and the leaf color at the base of the leaf is lightened. The leaves of 5-6 leaf stage appear pale yellow and light green stripes, but the veins are still green and the purple stripes appear at the base. In 10 to 15 days, the purple color gradually turned yellow-white, and the leaves became thin and white. In severe cases, the whole field is white, mainly due to lack of zinc in the soil. Zinc-deficient corn plants are dwarf, with short internodes and leafy clusters. In severe cases, the leaves are dry and even granules are not harvested.
The occurrence of the first kind of corn albino seedlings is controlled by genetic genes and has little impact on the economic value of corn. However, the selection of new maize varieties must focus on selection. To prevent maize albino seedlings caused by zinc deficiency in soil, mix l kg of zinc sulfate with 10-15 kg of fine soil, sow it next to the seed or mix it with zinc sulfate 0.75 to 1 kg/mu and diammonium or compound fertilizer. Fertilizer. Can also be used zinc seed dressing, with 0.04 ~ 0.06 kilograms of zinc fertilizer, 1 kilogram of water, dressing 10 kilograms, heap stuffy 2 to 3 hours, dry after sowing. For corn that has already appeared albino seedlings, use 0.2-0.3 kg of zinc sulfate per acre to spray 100 kg of water, spray once every 7 days, and spray 2 or 3 times.
Objective To evaluate the methods and the effects of an airway management nursing team in clinical practice
Airway Management,Airway Management Devices,Emergency Airway Management,Airway Obstruction Management
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