Citrus fruit is the key to wintering and protecting leaves
The orange trees with more leaves had more flowers and higher yields than the previous year after winter. To seize the high yield of orange trees in the coming year, it is necessary to do a good job of leaf protection during the wintering process. Reuse of fruit after harvesting orange fruit trees should be sprayed once 0.3% potassium dihydrogen phosphate for extra-root fertilizer, and a irrigation, in order to facilitate the restoration of tree heat, protect the leaves for the winter, enhance cold resistance. In addition, phosphorus and potash fertilizers should be added to the tree, and it should be combined with deep turning green soil. Winter drought and winter drought are the main causes of falling oranges. After the citrus fruit is harvested, the water and nutrient consumption of the tree body is greater, and in the winter, severe drought occurs, causing the leaf to curl and wilting. Therefore, if the soil is dry after harvesting, it must be combined with fertilization and irrigation once. Low temperature and freezing damage (1) Coated white: Lime 0.5 kg, sulfur powder 0.1 kg, water 3-4 kg, add about 20 grams of salt, and mix thoroughly painted white trunk stems, both insecticidal sterilization, antifreeze and anti-aging. (2) Earth-cultivation: In the orange orchard soil, eucalyptus, pond mud, and soil miscellaneous fertilizer are cultivated, and the soil layer is thickened to protect the roots from cold and cultivate 20-30 cm. The ground uses straw or other crop straws to cover the tree plate or the whole garden, with a thickness of 10 cm or more. (3) Smoke: When the cold wave comes, set 4 to 5 smoked tobacco piles per acre orange orchard, and ignite and smoke in the early morning of the defrosting, which can increase the temperature directly and form a gradual curtain layer over the orange trees to prevent frost and frost damage. . At the same time, it can also directly increase the temperature of the orchard to reduce the freezing injury. (4) pruning: pruning dead branches, pests and branches, cross branches, overlapping branches, clean the garden. About 30% of the whole tree leaves are frozen or fresh one-year-old shoots slightly frozen in the orange tree, we must promptly remove the freeze after the curly dry leaves, thin fertilizer and ground facilities. 0.2% urea and 0.2% potassium dihydrogen phosphate can also be used outside root dressing 2-3 times to facilitate the restoration of tree vigor. (5) Diligently apply leaf fertilizer, spray plant hormones, enhance leaf photosynthetic function, and reduce defoliation. After controlling the pests and diseases, spray 70% thiophanate-methyl 800 times to prevent anthrax. Immediately after the fruit is picked, the garden is cleared, the dead branches and diseased branches are cut off, the appropriate short cuttings are used to weaken the branches, the weeds are wiped off, the fallen leaves and the rotten fruit are cleaned, and then the 0.8-1 degree Baume lime sulfur compound, or 99% of the enemy insects are killed. 150 times more oil emulsion, etc., or 40% speed culling EC 800-1000 times such as spraying orange garden to eliminate the overwhelming insects, eggs, and use lime to brush the white trunk, with ash to close the wormhole cracks on the trunk. Source of information: "Rural Information News" China Agriculture Network Editor