So the dormancy period (post-ripening period) is about 3 months.

With the improvement of people's ecological awareness, more and more people began to use persimmons as tree species in courtyard greening. When winter comes, persimmon trees go into dormancy. Combined with the characteristics of dormant period of persimmon trees in courtyard, the management of dormant period of persimmon trees was introduced.

First, increase the application of base fertilizer. In order to promote the recovery of tree potential and nutrient accumulation, organic fertilizer can be applied before soil freezing in combination with tillage, and the fertilization method is furrow application. The base fertilizer is mainly farmyard manure, and it is best to mix phosphate fertilizer and potash fertilizer with farmyard manure. According to the tree size and fruit yield, apply 25-50kg of farmyard manure to each tree, mix it with 65438+ 0-2kg of calcium superphosphate and 0.2-0.5kg of potassium sulfate, apply it into a fertilizing ditch, mix it evenly with soil, and then cover the soil.

Second, shaping and pruning. Branches with cavities, weak branches and diseases and insect pests cannot bear fruit, so they should be cut off as soon as possible. Weak branches, clustered branches, dense branches and cross branches should be thinned out, and 2/3 short branches should be left to promote the growth of new shoots. After the fruiting branch blooms and bears fruit, flower buds cannot be formed in that year due to insufficient nutrition, so it should be cut off from the base, but 2 ~ 3 buds can be left at the base to facilitate vigorous growth and promote long branches. However, fallen flowers and fallen fruit branches can generally become good fruiting mother branches.

Third, cleaning and deep turning. Carefully remove pests, branches, dead leaves and weeds on the ground in combination with winter scissors, and take all the garbage out of the hospital for centralized incineration. Pay close attention to winter ploughing after cleaning. Winter ploughing can not only improve soil structure and increase soil fertility, but also turn pests that have wintered in the soil to the surface to freeze to death or dry in the sun, so that they will not be harmed in the coming year.

Fourth, pest control. 1. Scrape bark. Bark cracks are a good place for pests to overwinter, and scraping bark can greatly reduce the number of overwintering pests, so scrape off the rough skin of persimmon trees. 2. Paint the trunk white. After peeling persimmon trees, white agent should be applied to the peeling parts, and the concentration of the coating solution should be moderate, so that it should not fall off after coating, warp or fall off after drying. 3. Wipe the mud. The overwintering base of persimmon pests and other pests in the upturned seam on the trunk of grafted rootstock is very large. Because the bark of black dates is difficult to scrape, thick mud can be coated to suffocate the old mature larvae on the trees. 4. Spraying control. In the late dormancy period of persimmon trees, after winter pruning, 3 ~ 5 Baume lime-sulfur mixture or 5% diesel emulsion should be evenly sprayed on the tree surface and under the tree to kill the pests and diseases left on the tree and under the tree.

Five, the tree is cool. Due to the poor cold resistance of persimmon trees, the following measures can be taken to prevent cold when conditions permit: first, water them with frozen water in time; Second, the trunk is bound with cold-proof objects (such as straw rope, straw, waste cotton, etc.). ); Third, it is forbidden to pile snow under the tree to prevent the accumulated water from freezing and causing the tree to die. = = & gt& gt