Ribbed tomatoes are hollow fruits, also called hollow fruits, which are mainly manifested as unsatisfied flesh, ribbed fruit on the surface, light weight and poor quality. The production of hollow fruit is closely related to the weather and improper cultivation and management. For example, in winter and early spring, when it encounters continuous rainy weather, insufficient light, reduced photosynthetic products, and insufficient nutrients supplied inside the tomato fruit, it is easy to produce hollow fruit; During flowering and fruit setting, if the temperature in the greenhouse exceeds 36 ° C for a long time, the pollen is poorly fertilized, the cell division and seed formation of the fleshy tissue during fruit development are accelerated, and the fruit growth rate is not coordinated, and empty fruit will be formed; in addition, the fruit setting period of tomatoes Insufficient fertilizer and water supply and unreasonable anther concentration can also lead to the formation of hollow fruit.
For the reasons for the formation of hollow fruit, it is recommended to strengthen management from the following aspects:
First, strengthen temperature management. During the flower bud differentiation stage of seedlings, the first and second ear flower bud development stages, the temperature management of the shed should be done to ensure that the night temperature in this stage is not lower than 13 ℃, 25 ℃ ~ 30 ℃ during the day, and pay attention to wipe the shed film, increase Light to facilitate flower bud differentiation.
Second, strengthen fertilizer and water management and pay attention to nutrient balance. During flowering and fruit setting, ensure sufficient fertilizer and water, avoid partial application of potassium fertilizer, pay attention to the combined application of nitrogen, phosphorus and potassium, and at the same time cooperate with alginic acid and chitin functional fertilizers to maintain the root system. Watering should be done frequently with small water to avoid sudden dryness and wetness.
Third, pay attention to the concentration of dipped flowers. Change the concentration of the anthers according to the season to avoid excessively high concentration of the anthers, which will lead to accelerated fruit development and early maturity, while the placenta is still immature, resulting in empty fruit.
Fourth, keep fruits reasonably. Don't be greedy for fruit retention, and remove those who have been sitting but are underdeveloped in time to promote normal fruit expansion. And pay attention to reasonable leaf picking, especially in the later period, it is appropriate to keep 1 or 2 slices under the ear to avoid excessive leaf picking and aggravate the occurrence of hollow fruit.
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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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