The number of suitable seedlings for tomato seedlings is 1-2 times, which is the most common one. The main reasons why tomato seedlings are not suitable for multiple seedlings are: (1) Reducing root damage. Because the more the number of seedlings, the more serious damage to the root system will easily lead to premature root ageing. (2) Avoid forming aging seedlings. After the number of sub-seedlings is too many, the root group will not be fully expanded and the absorption capacity will be weak, which will cause the seedlings to be inhibited from growing due to insufficient nutrient supply. When the seedlings are inhibited for too long, they will form an aging seedling. . (3) Avoid prolonging the nursery period. Practice has proved that when tomato seedlings are used once every minute, the tomato seedlings of the same size are cultivated due to the hardening seedlings before seedling separation and the reasons for seedlings after transplanting, and the seedling propagation time is prolonged by 5-8 days, when the environmental conditions are not suitable. It will take longer to extend. (4) Reduce other damage to tomato seedlings. Seedlings are vulnerable to starvation if the seedlings are separated. Fragmentation during flower bud differentiation can have adverse effects on flower bud differentiation.
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Polysaccharide is a glycosidic bond bonded sugar chain, at least more than 10 monosaccharides composed of polymerized sugar polymer carbohydrates, can be used in the general formula (C6H10O5) n said. Polysaccharides composed of the same monosaccharides known as homopolysaccharides, such as starch, cellulose and glycogen; polysaccharides composed of different monosaccharides known as heteropolysaccharides, such as gum arabic is composed of pentose and galactose. Polysaccharide is not a pure chemical substance, but a mixture of substances with different degrees of polymerization. Polysaccharides are generally insoluble in water, have no sweet taste, cannot form crystals, and have no reducibility or change of spin. Polysaccharides are also glycosides, so they can be hydrolyzed, and in the process of hydrolysis, they tend to produce a series of intermediate products, and eventually completely hydrolyzed to obtain monosaccharides.
Edible mushroom polysaccharide;Wolfberry polysaccharide;Jujube polysaccharide
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