What antifreeze work is needed for fruit trees in winter?

First, do a good job in the summer management of fruit trees. First of all, a reasonable load should be taken to prevent the occurrence of nutrient deficiency in the tree. Secondly, pay attention to the use of organic fertilizer and less fertilizer. At the same time, the combination of nitrogen, phosphorus and potassium is reasonable. The ratio of annual dosage is about 1:0.5:1. The amount of nitrogen fertilizer should be controlled in the late growth stage to make the tree strong and stable in time. The branches develop and enrich and improve the antifreeze ability.

Second, spraying phosphorus and potassium fertilizer. In October, the tree is still in the growing season, and the fruit trees can be sprayed with phosphorus and potassium fertilizers. Conditionally, trace elements can be added to promote the development of shoots and flower buds, and improve the anti-freezing ability of the tree and flower buds.

Third, fill the frozen water. Winter irrigation should be carried out on the orchard before winter, on the one hand, the tree body can resist the freezing ability, on the other hand, the water can be used to enhance the buffering capacity of the orchard to change the temperature. At the same time, it can prevent spring drought in the coming year and cause pumping.

Fourth, the trunk is painted white. For those tree species, varieties or poorly managed orchards that are prone to freezing damage, the trunks should be painted white, mainly for whitening the trunk, main branches and large branches, which is effective for preventing freezing damage.

Fifth, the orchard is covered. In the winter, it is covered with straw, green manure, etc. on the orchard tree tray, generally covering 10-20 cm. Or cover with a plastic film. This can effectively improve the ground temperature and prevent the occurrence of frost damage to fruit trees. At the same time to prevent the straw from catching fire.

Sixth, key protection. Some tree species and varieties with significantly insufficient frost resistance should be protected. For example, the fruit growers who plant Zhonghua Shoutao should use the corn stalks to wrap the trunk and trunk of the ground about 1 meter before the winter, and then unpack them in the spring.

Seven, reasonable pruning. Do not trim too much, so that the tree body guarantees the proper amount of branches, which is good for freezing resistance. For larger shears and kerfs, apply the callus anti-corrosion film in time to protect the wound from healing and prevent the disease from invading from the wound. If the amount of flowers left is large, you can perform pre-flowering in the spring of the second year.

Eight, scraping bark should not be too early. Bark scraping can remove most of the pests and diseases that overwinter in the bark joints, reduce the occurrence of pests and diseases in the coming year, and promote the metabolism of the trees, which is conducive to the normal development of fruit trees. Such techniques are often applied to trees such as apples and pears. However, scraping the bark too early to scrape off the old tissue with strong anti-freezing ability on the outer layer, revealing the inner layer of tender tissue, it is prone to freezing damage, resulting in weakening of the tree rest, affecting the normal growth results of the tree. Therefore, the work of scraping the bark should be postponed appropriately, and the time can be mastered from late February to early March of the following year. And scrape the bark should pay attention not to be too heavy, generally grasp the bark white. After scraping, the whole tree sprayed tree guard general can disinfect and prevent frost, and protect the wound from healing quickly.

9. If necessary, carry out the orchard smoke and remove snow. For some varieties with poor cold resistance, the orchard should be smoked when a large cold current arrives, and the microclimate temperature of the orchard should be increased. After the heavy snow, the snow on the trees should be removed before the snow is snowed to prevent the snow from freezing and causing frost damage to the fruit trees.