What is the function of zinc sulfate?

What is the function of zinc sulfate? What are the common zinc sulfate? How to apply zinc sulfate? Also ask the netizens who know to help introduce that the correct use of zinc sulfate can prevent diseases in fruit tree nursery, and it is also a common fertilizer to supplement crop zinc trace element fertilizer, which can be used as base fertilizer, foliar fertilizer and so on. Therefore, the farming network sorted out the role of zinc sulfate, zinc sulfate types and usage, the following detailed list for netizens' reference. The role of zinc sulfate: first, zinc can promote crop photosynthesis: zinc is a specific activation ion of carbonic anhydrase in plant chloroplasts, and carbonic anhydrase can catalyze the hydration of carbon dioxide in photosynthesis. At the same time, zinc is also the activator of aldolase, and aldolase is one of the key enzymes in photosynthesis. Second, zinc can participate in the synthesis of auxin indole acetic acid: because zinc can promote the synthesis of indole and serine to tryptophan, and tryptophan is the predecessor of auxin synthesis, zinc indirectly affects the formation of auxin. In the case of zinc deficiency, the synthesis of auxin in crops decreased, especially in buds and stems, crop growth and development stagnated, leaves became smaller, internodes shortened, and the formation of leaflet clusters was a symptom. Zinc can promote crop protein synthesis: zinc is closely related to protein synthesis. RNA polymerase contains zinc, which is a necessary enzyme for protein synthesis. At the same time, zinc is not only a component of ribosome, but also a necessary substance to maintain the structural integrity of ribosome. Function 4. Zinc is an essential ingredient to stabilize nuclear sugars in crops: zinc deficiency in crops also reduces ribonucleic acid and ribosomes. In recent years. It is found that normal ribosomes contain zinc, and when zinc is deficient, this kind of cells are extremely unstable, indicating that zinc is a necessary component to stabilize nuclear ribosomes. Effect 5. Effect of zinc on crop reproductive organs: in the case of zinc deficiency, tomato buds are long and oval, and sepals are sparse. With the growth of the bud, the anther growth stagnated, the anther length was only about 1 × 3 of the normal anther, the style and ovary were slightly stronger than the normal plant, but the bud could not open and began to fall off, and the normal pollen grains could not be formed in the anther. Symptoms of zinc deficiency in crops: when crops are zinc deficient, the growth is blocked, the plant is short, the growth of internodes is seriously hindered, and the interveinal chlorosis or albinism of leaves. The new leaves are grayish green or yellowish white spots. The symptoms of zinc deficiency in vegetables are shorter internodes, dwarfing plant growth, chlorosis of leaves, abnormal expansion of some leaves, poor root growth, and less or deformed fruits. Types of zinc sulfate: zinc sulfate heptahydrate: generally colorless orthorhombic crystals, particles or powdered solids, melting point at 100 degrees. Zinc sulfate heptahydrate is soluble in water, insoluble in alcohol and acetone, and the aqueous solution is weakly acidic. It weathered easily in dry air. Zinc sulfate monohydrate: generally white fluidity powder. Zinc sulfate monohydrate is soluble in water, slightly soluble in alcohol and insoluble in acetone. The aqueous solution of zinc sulfate monohydrate is weakly acidic. Usage of zinc sulfate: first, use as base fertilizer: zinc sulfate can be used as base fertilizer for dryland crops such as corn, wheat, cotton, rape, sweet potato, soybean, peanut, etc., generally using zinc sulfate 1 to 2 kilograms per mu, mixing 10 to 15 kilograms of dry soil, after fully mixing, evenly scattered on the surface, and then ploughing into the soil, it can also be applied in strips or holes. The use of vegetables is 2kg zinc sulfate per mu. 2. Foliar spraying: 1. Fruit trees: spray 3%-5% zinc sulfate solution one month before sprouting in early spring, and spray concentration should be reduced to 1%-2% after sprouting, or brush annual branches with 2%-3% zinc sulfate solution once or twice. 2. Vegetables: foliar spraying zinc sulfate solution with a concentration of 0.05%-0.1% has a better effect in the early stage of vegetable growth, with an interval of 7 days each time, spraying 2-3 times continuously, each time spraying 50-75 kg solution per mu. Third, the use of seed soaking: zinc sulfate is mixed into a solution of 0.02% to 0.05% concentration, and the seeds are poured into the solution. It is better to submerge the seeds with general solution. Rice seeds were soaked with 0.1% zinc sulfate solution, rice seeds were soaked in clean water for 1 hour, and then put into zinc sulfate solution. Early and middle rice seeds were soaked for 48 hours, and late rice seeds were soaked for 24 hours. The corn seeds were soaked in 0.02%-0.05% zinc sulfate solution for 6 hours for 8 hours, and then the seeds could be sowed. Wheat seeds are soaked in 0.05% zinc sulfate solution for 12 hours, and then removed for sowing. Fourth, seed dressing use: every kilogram of seeds with 2 grams of zinc sulfate, dissolved in a small amount of water, sprayed on the seeds, spray while stirring, water consumption to be able to mix the seeds well, the seeds can be sown after drying. Points for attention in the use of zinc sulfate: 1, zinc sulfate should not be mixed with phosphate fertilizers such as calcium superphosphate, heavy superphosphate, diammonium phosphate and potassium dihydrogen phosphate, alkaline fertilizer or farm fertilizer (such as plant ash), so as to prevent zinc sulfate from hydrolysis into zinc hydroxide and affect crop absorption. 2. When zinc sulfate is sprayed as foliar fertilizer, the concentration should not be too high, so as to avoid zinc poisoning in crops. In order to improve the efficiency of zinc fertilizer, it is best to apply fertilizer such as molybdenum fertilizer or urea. 3. Excessive application of zinc fertilizer to crops will cause zinc poisoning in plants, which is mainly manifested in the hindrance of root elongation, yellowing of leaves and brown spots. In general, zinc poisoning occurs when the zinc content in the plant is more than 400 mg / kg. When there is too much zinc, the leaf color of the plant becomes green and yellowed, and the lower epidermis of stem, petiole and leaf shows reddish brown, which interferes with the absorption of iron. What are the advantages of foliar fertilizer what is the function of potash fertilizer