1. Spray rice vinegar: In the period from the rosette stage of Chinese cabbage to the ball stage, spray 300-500 times rice vinegar, spray once every 7-10 days, spray 2 or 3 times, and increase production by 15%-30%.
2. Spraying rare earth: spraying 0.03%, 0.05%, and 0.08% rare earth nitrate solution in the rosette stage, ball stage, and the core period respectively, and spray 3 times in total, which can increase production by 10%.
3. Spraying borax: 0.15% borax or 0.1% boric acid solution is sprayed on the rosette stage and the core stage foliar spray for 2 times, 30-60 kg per 667 m 2 of fertilizer solution, which can increase production by 10%. 15%.
4. Spraying urea: From the beginning of the rosette stage, spray 0.2% to 0.5% of urea solution every 10 days for a total of 2 to 3 sprays, which can increase production by 15% to 20%.
5. Spraying potassium dihydrogen phosphate: In the period from the rosette stage to the bulb stage of Chinese cabbage, spraying 0.3% to 0.5% of potassium dihydrogen phosphate once every 7 to 10 days, and even spraying 2 to 3 times, can be significantly increased. The net weight of Chinese cabbage is increased by 15% to 25%.
6. Spraying plant ash: from the beginning of the rosette period to the balling stage, 0.5% of the ash leaching solution of grass ash is sprayed once every 5 to 7 days, and a total of 2 sprays are produced, which can increase production by about 15% and improve quality.
7. Spraying foliar boiled leaves: Each time foliar botanicals are sprayed with 6000 times solution in the rosette stage, baldness stage and balsamic stage, they can increase production by more than 15%.
8.Spray double-effect micro-fertilizer: double-effect micro-fertilizers are sprayed at 800 times and 600 times respectively in the rosette period and the heart-filling period to prevent downy mildew, soft rot and viral diseases, improve quality, and increase production by 20%. ~35%.
9. Spray calcium chloride: During the period from the rosette stage of Chinese cabbage to the balsamic period, spray 0.7% calcium chloride solution every 7 to 10 days, and spray 3 to 5 times in total, which can prevent dry cabbage heartburn.
10. Spraying heart-wrapping agent: In the ball-wrapped heart period, 100 grams of Chinese cabbage preservative is applied per 667 square meters, sprayed with 30-50 kilograms of water, which can increase production by 15%, and it is also a soft rot of Chinese cabbage. , black heart disease, dry heart, etc. have control effect.
The above methods can be freely chosen, but they must be used on the basis of reasonable fertilization and watering, and some can not be arbitrarily mixed, such as potassium dihydrogen phosphate and rare earth solution, spray as far as possible not mix with alkaline pesticides.
Polysaccharides are polymeric carbohydrate molecules composed of long chains of monosaccharide units bound together by glycosidic linkages, and on hydrolysis give the constituent monosaccharides or oligosaccharides. They range in structure from linear to highly branched. Examples include storage polysaccharides such as starch and glycogen, and structural polysaccharides such as cellulose and chitin.
Polysaccharides are often quite heterogeneous, containing slight modifications of the repeating unit. Depending on the structure, these macromolecules can have distinct properties from their monosaccharide building blocks. They may be amorphous or even insoluble in water. When all the monosaccharides in a polysaccharide are the same type, the polysaccharide is called a homopolysaccharide or homoglycan, but when more than one type of monosaccharide is present they are called heteropolysaccharides or heteroglycans.
Natural saccharides are generally of simple carbohydrates called monosaccharides with general formula (CH2O)n where n is three or more. Examples of monosaccharides are glucose, fructose, and glyceraldehyde. Polysaccharides, meanwhile, have a general formula of Cx(H2O)y where x is usually a large number between 200 and 2500. When the repeating units in the polymer backbone are six-carbon monosaccharides, as is often the case, the general formula simplifies to (C6H10O5)n, where typically 40≤n≤3000.
As a rule of thumb, polysaccharides contain more than ten monosaccharide units, whereas oligosaccharides contain three to ten monosaccharide units; but the precise cutoff varies somewhat according to convention. Polysaccharides are an important class of biological polymers. Their function in living organisms is usually either structure- or storage-related. Starch (a polymer of glucose) is used as a storage polysaccharide in plants, being found in the form of both amylose and the branched amylopectin. In animals, the structurally similar glucose polymer is the more densely branched glycogen, sometimes called "animal starch". Glycogen's properties allow it to be metabolized more quickly, which suits the active lives of moving animals.
Cellulose and chitin are examples of structural polysaccharides. Cellulose is used in the cell walls of plants and other organisms, and is said to be the most abundant organic molecule on Earth.It has many uses such as a significant role in the paper and textile industries, and is used as a feedstock for the production of rayon (via the viscose process), cellulose acetate, celluloid, and nitrocellulose. Chitin has a similar structure, but has nitrogen-containing side branches, increasing its strength. It is found in arthropod exoskeletons and in the cell walls of some fungi. It also has multiple uses, including surgical threads. Polysaccharides also include callose or laminarin, chrysolaminarin, xylan, arabinoxylan, mannan, fucoidan and galactomannan.
Polysaccharide Series,Cordyceps Polysaccharide,Hericium Erinaceus Polysaccharide,Goji Polysaccharide
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