There are ways to persimmon
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If the planted variety is astringent persimmon, it must be treated with astringent detergency to be edible or processed; if the planting is incomplete persimmon, the pollination tree must be configured to allow it to fully pollinate to form multiple seeds, and the pulp Produce many brown spots to get rid of naturally astringent.
In the case of astringent persimmons, when the fruit matures, it still contains a large amount of soluble tannins, and the entrance will make people feel strongly astringent. If the artificial method is used to make the astringent persimmon peel off in a short time, several simple and practical methods for removing the astringent persimmon are described as follows:
First, warm water off the astringent method: the persimmon fruit into a container filled with warm water at 35-40 °C, the container mouth is covered with cotton quilt, closed and heat preservation, after 15-30 hours can make astringent persimmon off astringent.
Second, the lime water off the astringent method: According to the water: quick lime ratio of 10:1 deployment, when the lime water is warm, add persimmon fruit, just to submerge the persimmon fruit for degree, gently stirring, and then close the container mouth, about 3- 4 days after the persimmon can be astringent.
Third, mixed dislocation astringent method: the persimmon fruit and a small amount of ripe apples, pears, kiwi fruit (approximately 1/10 the amount of persimmon), mixed in the container sealed, the use of ethylene from other mature fruits to promote persimmon If the fruit is astringent, astringent can be removed within 3-7 days at 20°C.
Fourth, the alcohol off the astringent method: in the bottom of the sealed container after a layer of cotton into the persimmon fruit, persimmon fruit placed in layers, each layer with a certain amount of alcohol or shochu spray, and then sealed. Every 20 pounds of persimmon fruit is diluted to 35% alcohol or 80-100 milliliters of shochu spirits. At 20°C, it is generally astringent after 5-8 days.
Fifth, carbon dioxide off astringent method: The astringent persimmon is sealed in a container or plastic bag, so that the ratio of the volume of the fruit and the remaining space is 1:1.29, by the carbon dioxide produced by the astringent persimmon, so that the concentration of carbon dioxide in the container increased to 60% or more , Oxygen concentration dropped below 1%, can be astringent within 3 days at 20°C. When the persimmon production scale is large and the yield is high, most of the persimmons are treated with high-concentration carbon dioxide to make the persimmons astringent. The persimmons packed in boxes or baskets are sealed in the film of plastic greenhouses, and compressed carbon dioxide gas is injected from the cylinders at 25°C. When the concentration reaches 60% or more, the astringent can be removed in about 24 hours.
Sixth, ethylene and astringent method: Ethylene liquid agent 250-500m g / l, plus 0.2% detergent for the exhibition agent, fruit spray or fruit, about 3-5 days to soften off astringent.
In addition, astringent persimmon trees can be improved by high grafting. Persimmon trees can be reclaimed from tree crowns in the same year after they are harvested. The yield can be restored in the second year. It is an effective method for astringent persimmon trees to be improved. However, the following problems should be paid attention to in the process of high-replacement planting: High-cultivation varieties require strict requirements for the interstock (trees that require high exchange), Jiro lines have good compatibility with most of the interstocks, and good growth results; Grafting in the year had a high survival rate, a strong growth potential, a large amount of flowers, and a large number of results in the second year, but afterwards, the growth potential gradually weakened to death. The rich lineages had good affinity with wild persimmons and some astringent persimmons, and they had normal growth and development. With other rootstocks, the survival rate is low, growth after survival is weak, and even summer withered to death. Therefore, in production, the combination of varieties and interstocks at the time of high-replacement planting must be reasonably selected. At present, the varieties that perform better in comprehensive traits include Jilang, Xingjin and Xinqiu.