Tree management 1. Deeply turn over the tree plate to store water and keep fertilizer: every year, the tree is turned over twice, the first time in the spring from March to April; the second time after the fruit is harvested and before the freezing. The deep-turning range is slightly shallower and outward from the trunk to the edge of the canopy to prevent root damage. 2, tree plate covering grass: want to improve soil nutrients, water conditions can be covered by the tree tray, which is one of the important measures for high yield and quality of persimmon trees. It can also slow down the temperature change under the tree tray to maintain the stability of soil temperature; Reduce evaporation and runoff to maintain relative humidity of soil; increase soil organic matter content. The grass cover time is in March each year. Appropriate amount of nitrogen fertilizer and potassium fertilizer should be applied before covering the grass, then watering and then covering the grass. The thickness of the grass should be 15-20 cm, covering within the canopy range, but not covering the grass within 30 cm from the trunk. After the grass is covered, the right amount of stars will be pressed to prevent the wind from blowing and the fire. Fertilization in autumn The suitable time for the autumn application of the base fertilizer is from mid-late September to early October. At this time, the high temperature and high microbial activity of the organic matter decomposes the rot heat and facilitates the root absorption. The fertilizer is mainly organic fertilizer and is equipped with quick-acting fertilizers such as N and K. Each plant is applied with 100-200 kg of soil-fertilizer, 10-20 kg of human excrement, 15 kg of grass ash and 0.5 kg of urea and 4 kg of superphosphate. Use a groove or an annular groove to dig a 50 cm wide and 60 cm deep groove or annular groove along the outer edge of the canopy to place the topsoil and unfertilized crop straw into the bottom of the ditch, and the decomposed soil and fertilizer are fine. After the fertilizer is mixed, it is applied into the soil layer of 20-30 cm. It should be noted that fertilization of decomposing farmyard manure and fine fertilizers should not be applied too deeply to avoid affecting fertilizer efficiency. Skillfully applying top dressing Persimmon trees are topdressed twice a year. For the first time in March, the whole tree was covered with grass. The second time in the late July, the fruit was rapidly inflated. In the early stage, the topdressing fertilizer was mainly based on nitrogen fertilizer, and the potassium fertilizer was mainly used with the appropriate amount of phosphate fertilizer. If there are irrigation conditions, the fertilizers can be topdressed according to the weather. Generally, according to the size of the crown, each small hole is digging into the chemical fertilizer and then filled with soil. Reasonable pruning In production, persimmon trees are often neglected to make their natural growth, resulting in weaker and weaker light in the upper and lower areas. In the pruning, you should grasp the principle that there are not many long-distance branches after the results of short and short cuts. 1, winter pruning The light shear is used as the main shrinkage combination to adjust the skeleton to improve the ventilation and light transmission conditions. It is necessary to eliminate some of the dense branches, thin branches, overlapping cross branches, dry branches of the pests and diseases, and pay attention to retracting the perennial weak branches to stimulate new branches. Short twigs cause the secondary buds to sprout into branches. 2, summer pruning Mastering the principle of combining sparse, picking, engraving and ring cutting is to eliminate the branches left by the big shoots and the inner stalks, the weak, and the improperly positioned new shoots, which are easy to flower due to improved light and nutrient conditions. Before germination, the annual shoots are buds to promote the middle and short branches. The new shoots and other branches of the carved buds are topped at 30-40 cm. The tops of the weak branches are easy to form flower buds. The second branch can form the second year of flower buds. In order to increase the fruit setting rate, large-scale auxiliary branches should be cut at the flowering stage. 3, autumn pull branches The best time to pull the branches in a year is September, but in the summer season from May to June, the branches of the erect stalks and the prosperous new shoots can be pulled. In September, the main object of the pull branch is the base of the main branch and the auxiliary branch. The opening angle of the main branch should be less than 70 at around 90, and the pull-down is greater than 70. The upward pull is not appropriate, and it is pulled to the left or right. Note that such large branches should not be hard-drawn and easily split. The correct method is to use the 3 saws on the back and then use your feet to hold the base and slowly pull them down. Finally, the upper main branches and side branches are flattened. Pest Control Persimmon tree pests include scale insects, persimmons, and persimmon caterpillars. Disease prevention and treatment of angular spot disease and round spot disease: 1. Thoroughly clean the orchard in the early winter season. Remove the persimmon on the residual tree. Clean the leaves, pests and diseases, and pests and diseases around the persimmon tree to remove the pests, round spots, persimmon moths and other pests. Reduce the harm of the coming year. 2, in the winter, the trunk and the old rough skin on the big branch are scraped off and the skin is whitened to remove the persimmon and the grass. 3, chemical control of persimmon tree before germination should be carefully sprayed 1 times Nongxing + Birun + Shi Haomei, from June to early August alternately spray green health, Yingmei, Akaqi, etc. for disease prevention and control The occurrence of pests and timely spraying and prevention. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Lake Smelt,Lake Superior Smelt,Pond Smelt,Pond Smelt Fish ZHEJIANG EVERNEW SEAFOOD CO.,LTD , https://www.evernewseafood.com