1. Increase ground temperature
Before entering the greening period, garlic should mainly raise the ground temperature. The cover on the film, such as leaves, crop straws, dead garlic leaves or dust, should be removed as soon as possible to increase the light transmittance and the ground temperature. The damaged mulch should be repaired in time to enhance the effect of heat preservation and warming, and promote the early greening of the mulch garlic.
2. Fertilizer and water management
After entering the "Jiaozhe" solar term, choose 3 to 5 days of sunny morning watering and topdressing, combined with watering acres to apply 20 kg of nitrogen fertilizer and 15 kg of potassium fertilizer. In case of special drought, you can water once in late March. In principle, do not water too early, otherwise it will easily cause disease or secondary growth of garlic. After each watering, it should be cultivated in time to increase the ground temperature and keep the roots and seedlings. Before and after the Ching Ming Festival, if there are yellow tips on the leaves, the second top dressing should be carried out in a timely manner, mainly with quick-acting nitrogen fertilizer, the use amount per mu is 20 kg, and the number of watering times should be increased in time. Promote plant growth.
3. Prevention and treatment of diseases
The low temperature in spring is prone to cold spring weather, which affects the normal growth of garlic. After the garlic enters the greening period at the end of March, the leaves can be sprayed with "Bihu" or brassinolide on the sunny afternoon to improve its resistance to adversity. Leaf blight and gray mold are common diseases of garlic in spring. In the early stage of the disease, small white dots appear on the leaf tip of garlic or light brown long oval spots on the surface of the leaf. When the disease is severe, the leaf dies, the base rots, and the garlic plant falls down. When the diseased plant rate reaches 15%, use 50% Carbendazim 800 times solution or 20% Fenrusting 2000 times solution for spray control.
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API Powder (Active Pharmaceutical Ingredient)
Active Pharmaceutical Ingredients refer to the raw materials used in the production of various preparations. They are the effective ingredients in the preparations. They are various powders, crystals, extracts, etc., prepared by chemical synthesis, plant extraction or biotechnology, but Substances that the patient cannot take directly.
According to its source,Active Pharmaceutical Ingredients are divided into two categories: synthetic chemical drugs and natural chemical drugs.Chemical synthetic drugs can be divided into inorganic synthetic drugs and organic synthetic drugs. Inorganic synthetic drugs are inorganic compounds (extremely elements), such as aluminum hydroxide and magnesium trisilicate used to treat gastric and duodenal ulcers; organic synthetic drugs are mainly composed of basic organic chemical raw materials, through a series of organic Drugs made by chemical reactions (such as aspirin, chloramphenicol, caffeine, etc.).
Natural chemical drugs can also be divided into biochemical drugs and phytochemical drugs according to their sources.Antibiotics are generally made by microbial fermentation, which belongs to the category of biochemistry.In recent years, many semisynthetic antibiotics are the combination of biosynthesis and chemosynthesis.Among APIs, organic synthetic drugs account for the largest proportion in variety, yield and output value, which is the main pillar of chemical pharmaceutical industry.The quality of API determines the quality of preparation, so its quality standards are very strict. All countries in the world have formulated strict national pharmacopoeia standards and quality control methods for its widely used API
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