Early Rice No-tillage Broadcasting Technique
1. Weed processing. 15 to 20 days before throwing planting, the sunny mu was selected for field chemical weeding with 200 ml of dry field spray. After the weeds die, soak in water for several days, then drain the rice for 1 to 2 days so that the weeds cling to the soil surface to prevent the weedy residue from having a bad influence on the rooting of the seedlings after they are thrown. If the impurity is not completely removed, 20% of the herbicide is used per acre for 2 to 3 days before the seedling is thrown, and 250 ml of a herbicide is mixed with 60 kg of water to spray on a sunny day, and the field is dried one day after spraying to increase the weeding effect. Green fertilizer fields are also treated as described above.
2. Level land soil. Waseda, which has been through winter and spring, has caused inconvenience to fields due to human and animal activities. Therefore, it is necessary to level the land before throwing. The method is to use the hoe to dig the mud from the high place to the low rake when the field is reseeded after the weeding, and at the same time, to prevent leakage of water from the ridge, the mud shall be used to reinforce and prevent leakage.
3. Apply fertilizer. Mushi 25% of the rice compound fertilizer 25 to 35 kg, urea 7.5 to 10 kg, mixing evenly spread the field the day before the cast. When fertilizing, the field water should not be too deep, and it is advisable to keep the water in the next day.
Second, no-till floppy disk breeding. The practices and management of no-tillage rice seedlings in early rice are the same as those for cultivating early-season plucked floppy disks, but two points should be noted.
1. Variety selection, collocation and seed use. Considering that late rice also engages in no-tillage farming, the varieties should be selected to be difficult to fall grain; the varieties should be allocated early or early in the match, or they will not achieve the effect of increasing production and income; no-tillage seedlings will be used per acre. An increase of 0.25 kilograms over tillage and throwing in order to ensure that the field will be transplanted with 21,000 to 23,000 hectares per mu.
2. Nutrient, simmering and ageing. In order to prevent muddy water from scattering, unfavorable vertical seedlings should be made of viscous heavy fertile soil as floppy nutrient mud, not sandy soil; no-tillage seedlings should use 353 holes or 400 holes of large-diameter discs. The age of 15 to 20 days is preferred, and the leaf age of about 3.1 leaves is appropriate, otherwise it will be disadvantageous.
Third, no-tillage and field-planting Daejeon pre-management
1. Manage water. After throwing, keep shallow water in the field, avoid deep-water irrigation before setting seedlings, and field irrigation can't be used for emergency irrigation. Because the roots of nutrients and soil are not stable, it is necessary to prevent the seedlings from moving along with the water.
2. Weeding and fertilizing. When all seedlings stand seedlings, mu compound rice fertilizer 15 to 20 kg, urea 7.5 to 10 kg, throwing herbicides (casting or throwing abundance) mix and spread. Pay attention to strictly control the amount of herbicide, can not be over-application, field water can not flood the seedling heart leaves, or easy to produce phytotoxicity.
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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