Persimmon is the general name of persimmon, and the fruit part is commonly known as persimmon, which is the fruit of persimmon. Its trees are deciduous trees or shrubs with beautiful crowns, which can be used as shelterbelts and greening trees. In autumn, persimmon leaves turn red after frost, which is very beautiful. Persimmon trees should generally be planted with the same black dates as rootstocks. Black dates are also called "monkey dates", and their fruits are much smaller than persimmons.

Persimmons are oblate, ranging in color from light orange to dark orange, ranging in size from 2cm to10cm, and ranging in weight from100g to 350g ... Persimmons, with delicate and hard wood and black heartwood, are also called "ebony" and can be used to make furniture and other appliances. Persimmon has been cultivated for 1000 years. Zhang Zhongshu, a poet in the Northern Song Dynasty, called persimmon a beauty: "It tastes too much like Fang Lin's, with clear and dark colors, light and evenly wrapped in crimson wax, and it is not exposed to people." . Today, China, Japanese, Korean and Brazil are the main producing areas.

There are more than 1000 varieties of persimmons, which are mainly divided into sweet persimmons (also called' sweet persimmons') and astringent persimmons. The former is already astringent when cooked, and the latter needs artificial astringency. There are varieties of persimmons such as Hebei Mopan Persimmon, Lotus Persimmon, Jingtian Persimmon, Niuxin Persimmon, Gengbing Persimmon, Deng Ling Persimmon, Jixin Persimmon, Red Persimmon, Ganmao Persimmon, Mian Persimmon, Dahongpao Persimmon and Luotian Persimmon. In the north, especially in some areas of Shandong, persimmons are used to make persimmon pancakes. Persimmons are not easy to transport and store in the northeast of China. In winter, persimmons are usually placed outdoors and frozen into ice at extremely low temperature, which is called frozen persimmons, and then transported and stored. Because frozen persimmons are particularly hard, they are usually put into water before eating. Through heat exchange, the temperature of frozen persimmon rises, softens and is convenient to eat. This process is called persimmon thawing. There is a great difference in the taste between the melted frozen persimmon and the unfrozen frozen persimmon, and some people directly eat the cold and hard frozen persimmon, which has a unique flavor.

Eating persimmon on an empty stomach may cause "gastrolithiasis". Persimmons contain a lot of persimmon gum. When eating persimmons on an empty stomach, persimmon gum will condense into blocks with the gastric acid secreted by the stomach. When the lump accumulates, it may lead to the inability to discharge, which is called "stomach pestle disease" in medicine.

In addition, patients with iron deficiency anemia and taking iron can't eat persimmons. Because persimmon contains a substance that will hinder the absorption of iron. Do plastic surgery

Persimmon trees often adopt a sparse shape, with a dry height of 0.8- 1 m. The main branches are generally divided into three layers. There are three main branches on the first floor, and the azimuth of the three main branches is kept at 120 degrees, and the base angle is 60-70 degrees. Leave 2-3 lateral branches for each main branch. Generally, the first branch is 60 cm away from the trunk, the second branch is 50 cm away from the first branch and the third branch is 40 cm away from the second branch. The lateral branches at the same level are distributed on the same side, and the included angle of the lateral branches is 70-80 degrees. The interlayer distance is 40cm, and the interlayer distance is about 0.8-1m. The second layer has two main branches, each of which is scattered up and down, and the third layer has 1 branch. The base angle is about 60 degrees, and it grows northward and windward.

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In order to cultivate backbone branches at all levels, we should widen the angle of main branches and cut off the central trunk at 60 cm to promote the development of new branches and adjust the master-slave relationship of backbone branches. Combined with summer pruning, when the branches grow to 40 cm, the dense branches and twigs in the crown retract and update in time. The bare crown of old trees leads to a large number of twigs dying, and the phenomenon of falling flowers and fruits is serious year after year. At this time, the main task of pruning is to recover the backbone branches at all levels and raise the angle of the main branches for rejuvenation. The drooping branches on the crown of the tree contracted again and were renewed. Leave the bearing branches in the lower part of the tree, and short cutting will promote new branches. In addition, it is necessary to strengthen the management of soil, fertilizer and water, as well as the prevention and control of pests and diseases. Appropriate replanting of young trees and gradual replacement of old trees.