October is the transition season from autumn to winter. Temperatures drop rapidly, and there will be continuous rain, drought and early frost in some areas. At this time, it is the critical period of citrus production. Farmers who cultivate citrus must pay attention to it. So how is October citrus managed? I. Nursery Management Continue to complete the work of abdominal grafting. After the autumn shoots are mature, qualified seedlings are planted or planted in the nursery. Second, young tree management 1. Seedling planting â‘ Digging the planting points. The planting hole standard is 1.2 meters in length and 0.8 meters in depth. When digging holes, the topsoil is piled up for backfilling the planting holes. Back to fattening. Put 10 cm of poor soil at the bottom, then 50 kg of soil fertilizer, or 10 kg of crop manure, and then return to 10 cm of poor soil; the middle layer will be 25 kg of rotten pig and cow dung, 15 kg of human urine or oil cake 2 Kg (to be rotten), 1.5 kg of superphosphate, placed around the planting hole, mixed with topsoil backfill 30 cm; the top layer is backfilled with the best topsoil. After backfilling, dig a planting hole of about 0.4 meters in the center of the planting hole. â‘¡ Colonization of container seedlings. Take the seedlings and loosen the nutrient barrel with the palm of your hand to remove the seedlings. Hold the seedlings with your left hand and scrape off the nutrient soil around the root with a tip of your right finger about one centimeter. Root, use a branch shear to cut off the curved root. Put the seedlings in the center of the planting hole with your left hand, with the roots upright, and the root neck should be exposed to the ground. When filling the soil with 1/3 of the roots, press the soil around the roots with both hands, and then lift the seedlings up. Feet are solid around the seedlings. When you soil, protect the nutrient soil carried by the root system. After planting the tree, make a water circle around the tree tray. After the seedlings are planted, they are about 50 cm higher than the ground to ensure that the root neck of the seedlings will not be sunk after the soil sinks. After the seedlings are planted, they should be drenched with water in time to make the roots tightly integrated with the soil. In rainy days, each plant is irrigated with about 15 kg of clean water. The seedlings planted on sunny days are irrigated with about 25 kg of clean water. 10 days after planting, water was irrigated again, and within three months, 60 g of potassium sulfate compound fertilizer (containing 15% each of nitrogen, phosphorus, and potassium) was used for the next 10 days. 2.Fertilize In early and mid-October, 1-3 years of young trees, 52, 76, and 102 grams of urea per plant, 40, 40, and 55 grams of calcium superphosphate, and 17, 25, and 33 grams of potassium sulfate, respectively. Fertilization method: circular fertilization. Shi. Shallow ploughing of the tree disc, and then make a tree disc with a diameter of 1.2 to 1.5 meters, is conducive to the good development of the root system. The citrus row is cultivated at about 15 cm, and weeds are pressed into the soil to increase soil fertility. In early and late October, 0.3% urea + 0.2% potassium dihydrogen phosphate was used for foliar spraying. Third, the result tree management 1.Fertilize In early and mid-October, the first fruiting tree: 7-8 kg of urine and 0.1-0.2 kg of urea were applied to each plant; the adult fruiting tree: 10 kg of pig manure and 0.1 kg of urea were applied to each plant. Fertilization method: Strip or radial fertilization, the width and depth of the fertilization furrows are 0.3 meters each, the length depends on the crown, and part of the root system is cut to promote the growth of new roots. After fertilizing, dip back into the soil and make tree trays. Based on the dripping water around the crown of the tree, ploughing the inside of the tree tray to build a good tree tray is conducive to the good development of the root system. The citrus row is cultivated at about 15 cm, and weeds are pressed into the soil to increase soil fertility. In early and late October, 0.3% urea + 0.2% potassium dihydrogen phosphate was used as a foliar spray to reduce the occurrence of fruit cracking. 2. Organize the drainage ditch. Prevent water accumulation in orchards and promote good root growth. 3. Remove the split fruits and autumn flowers in time to reduce tree consumption. Fourth, the aging tree The age of the tree is more than 40 years, and from a large number of results to a gradual decline in yield is called senescence. Planned canopy and root system renewal is needed. 1.Deep turning fertilizer From October to after fruit picking, turn every other row between citrus rows and complete it in two years, so there are fewer injuries. A deep ditch is opened at the periphery of the canopy, which is 60-100 cm deep and about 100 cm wide. Pay attention to the following three issues when deep turning: â‘ Make full use of topsoil during deep turning: When deep turning, pile up topsoil for backfilling. â‘¡ Deep digging should dig through the clip wall: When deep digging, the compacted soil at the absorption root must be opened, and a part of the root system with a diameter of about 1 cm should be cut with a branch shear to promote new roots. â‘¢ Deep turning should be combined with fertilization: after deep turning, the topsoil and better fertilizer are placed around the absorbing root. Each plant was pressed with 100 kg of slag fertilizer, 1 kg of cake fertilizer, and 1 kg of superphosphate or calcium magnesium phosphate fertilizer. Phosphate and cake fertilizers are mixed with topsoil and pressed into the root concentration layer because of poor mobility of P and K fertilizers in the soil. After the deep digging and expanding the hole and fertilizing, the water should be irrigated once in time, so that the root system is tightly integrated with the soil, which is conducive to the root system and tightly integrated, and is conducive to the development of the root system. 2.Fertilize 10 kg of pig manure and 0.2 kg of urea were applied to each plant. 0.3% urea + 0.2% potassium dihydrogen phosphate was used for foliar spraying. V. Pest Control October is the occurrence period of red spiders, rust ticks, leaf miners, Spodoptera frugiperda, and should be checked frequently to prevent them in time. The above are the main points of the management technology of citrus in October. In October, the temperature gradually decreases and the rainfall decreases. At this time, the citrus is in the mature stage of autumn shoots and the fruit expands. The promotion of flowers should also be carried out in time to ensure the yield and quality of citrus next year. 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