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How to manage citrus in winter
(1) Early harvesting of temperate oranges is usually harvested in the middle or early October. Warm oranges and middlings are generally harvested from late October to mid-November, and navel oranges are harvested in mid-November. Harvested in the late days (excluding late navel oranges and summer oranges), harvested from late January to mid-December. Fruits that stay on the tree for a long time are prone to depletion of tree nutrients, which is not conducive to restoring tree vigor and affecting the yield for the second year. In the event of freezing injury, the quality will have a great impact and even lose its economic value. (2) Apply fruit fertilizer in time, end deep plowing and enlarge the hole in due course, apply fruit fertilizer after picking up the base fertilizer, and apply the fruit fertilizer in time. It may also be applied a few days before harvest to facilitate restoration of tree vigor. The fruit fertilizer should be mainly quick-acting fertilizer. 50 kg of excrement per plant, or 20 kg (concentrated) to 50 kg (diluted) of dried cakes fermented in the cellar. Deep-enlargement points are generally started in September and ended in early December. After the soil was changed late, there were too many wounds and there was no recultivated soil. Freezing damage caused cold damage. Expand the hole along the canopy divergence on both sides of the digging width, depth of 50 cm above the groove, adult trees buried in a certain weeds and dried cakes 2 to 3 kg, calcium magnesium phosphate fertilizer 1.5 kg, lime 1 kg (red earth mountain), or weeds Add 50 to 70 kilograms of pig manure and halve the young tree. In November, interplanting green manures between rows of fruit trees, such as radishes and red flowers and plants. (3) Disinfection in clear gardens to reduce the severity of disease and insects in the citrus orchard. After the fruit is harvested, 10 times of the pineine mixture should be sprayed. In the case of fleas, 73% of the emulsion should be sprayed once. . After harvesting fruit, before the sprouting of the citrus fruit, carefully spray a 1 to 2 degree lime sulfur mixture (1 to 1.5 degrees at high temperatures and 2 degrees at low temperatures). No drought for a long time and no rain. All sprayed pine alkali mixture should be sprayed with lime sulfur after 20 days. At the same time, the pests should be cut off as soon as possible, the fallen leaves should be removed, the field and roadside weeds should be removed, and they must be burned together. Use a wire hook to kill the tree. Open drainage ditch. (D) do a good job of antifreeze 1, trunk soil. Starting in the middle and late November, the soil is usually cultivated to the trunk, and it is better for the primary branch to be cultivated. The soil should be compacted (shocked in the coming year). 2. The trunk is painted white. Whitening agent: 10 kg of quicklime, 1 kg of sulfur powder, 0.2 kg of salt, and 30 to 40 kg of water. The trunk and the main branch are evenly painted on sunny days. 3, bundle branches. Young trees can be bundled with straw ropes. 4, irrigation. In case of drought in November and December, irrigation should be carried out in time to prevent freezing. A few days before the freezing injury should be fully watered. 5, smoke making clouds. Prepare weeds, straw, sawn timber, oyster shells, etc. before freezing. According to the weather forecast, before the low temperature arrives, in particular, it is necessary to dissolve snow, and the frosty sunny days before midnight ignite smoke. Each citrus citrus garden fires 4 to 6. Take care not to use open flames, make it produce smoke, and disperse cold air.