In the past three years, there has been continuous warm winter weather in our province, and the average winter temperature is higher than normal in the winter. Since the beginning of winter this year, the temperature has remained high and it should be a warm winter again. The warm winter will cause the fruit trees to stop growing late, and the anti-freezing ability will decline. If you experience sudden and severe temperature drop, it is extremely prone to frost damage. The majority of fruit growers should not neglect the management of frost protection of fruit trees due to the warmth of winter and cause losses to fruit tree production. In particular, the orchards in the following situations require more attention. First, the new orchard planting saplings. Robust, mature fruit trees grow well, have a good ability to resist freezing, and generally cause less freezing damage. The newly planted saplings have prolonged growth because of their prolonged habits, lack of adequate root development, poor shoot development, poor frost resistance, and prone to cold damage in cold temperatures, and affect the shoots in the spring. Causes dead trees. Second, planting an orchard with poor frost resistance or tree species. Different tree species and varieties have different resistance to frost damage. For freeze-prone tree species and varieties, antifreeze work must be done well. For example, pears, jujube and other tree species have stronger cold resistance and are less likely to suffer freezing injury. Apples, peaches, apricots, grapes, walnuts, cherries and other tree species have poor cold resistance and are prone to frost damage. In particular, some of these tree species have poor resistance to cold, and they must do a good job of preventing freezing. Such as the red Fuji apple, peach in the 21st century, the Chinese peach, most of the grape varieties. Although pear trees are more resistant to hypothermia, some varieties are prone to freeze damage. For example, the flower buds of Snow Pear, Golden Pear, Huangguan Pear, and Yulu Pear are susceptible to freezing. The freezing buds occur and the flowers do not bloom normally in spring, affecting fruit setting. Caused by production cuts, we must pay attention in production. 3. Orchards with low management standards and poor conditions of origin. Freezing damage to the leeward sunny orchard occurred lighter, and heavy damage occurred in the shady orchard, low-lying land orchard, and desert orchard. Orchard with good management level, reasonable fruit load, emphasis on organic fertilizer, rational application of chemical fertilizer, robust tree, adequate storage of nutrients, abundant branch buds, strong cold resistance, and not prone to frost damage; on the other hand, if there are too many results, too much nitrogen fertilizer is used. In the orchards, new shoots are prosperous, growth stops late, branches develop poorly, and the trees are prosperous and prone to frost damage. In view of the above situation, the following work should be done to prevent fruit tree frost damage. First, do a good job in summer management of fruit trees. First of all, we must load properly to prevent the occurrence of tree nutrient deficiency. Second, pay attention to more use of organic fertilizer, less fertilizer. At the same time, the mix of nitrogen, phosphorus and potassium is reasonable, and the annual usage ratio is about 1:0.5:1. The amount of nitrogen fertilizer must be controlled at the late stage of growth to make the tree robust, stop at a long time after entering the winter, and the branches develop well and improve the antifreeze ability. Second, spray phosphorus, potash fertilizer. In October, the tree is still in the growth stage. The tree can be sprayed with phosphorus and potassium fertilizers. Trace elements can be added to the condition to promote the development of shoots and flower buds and improve the anti-freezing ability of the tree and flower buds. If you can spray three thousandths of potassium dihydrogen phosphate solution. Spray once every 5 to 7 days and spray twice. Third, fill the frozen water. Before the winter, the orchards should be filled with winter irrigation, on the one hand to enhance the anti-freezing ability of the trees, and on the other hand to use the characteristics of large specific heat of water to enhance the orchard's buffering capacity against temperature changes. At the same time, we can prevent the spring drought in the coming year and cause pumping. Fourth, the trunk is painted white. For tree species, species, or poorly managed orchards that are prone to frost damage, trunks are painted white, and the main trunk, main branches, and large branches are painted white, which is effective for preventing freezing damage. 5. Orchard coverage. In winter, the orchard tree tray is covered with straw, green manure, etc., covering generally 10 to 20 cm. Or cover it with a plastic film. This can effectively increase the temperature of the ground and prevent fruit trees from freezing. At the same time, it is necessary to prevent straw from catching fire. Six, key protection. For some tree species and varieties whose frost resistance is obviously insufficient, priority should be given to protection. For example, a fruit grower planting a Chinese stalk peach should apply corn stalks to protect the trunks and trunks of about 1 m above the ground to prevent freezing before winter and then release them in the spring. Seven, reasonable pruning. Do not trim excessive weight, so that the tree to ensure the right amount of branches, is conducive to frost resistance. For large cuts and kerfs, paint in time to prevent excessive water loss and weaken the cold resistance. If the amount of flowers left is large, it can be cut in the spring of the second year. 8. It is not appropriate to scrape the bark prematurely. Scrape bark can remove most of the diseases and pests that overwinter in the bark seams, reduce the incidence of diseases and pests in the coming year, and promote the metabolism of the tree, which is conducive to the normal development of fruit trees. Such techniques as apple, pear and other tree species are often applied. However, scraping the bark prematurely scratches the old tissue with strong outer layer antifreeze ability, and exposes the tender tissue in the inner layer, which is prone to frost damage, resulting in weakening of the tree and affecting the normal growth of the tree. Therefore, scraping the bark should be postponed properly, and the time can be controlled from late February to early March. And scraping the bark should be careful not to be too heavy, generally grasp the bark dew white. 9. If necessary, smoke the smoke in the orchard and remove the snow. For some varieties with poor cold resistance, the orchard must be smoked when the large cold current arrives, and the microclimate temperature in the orchard should be raised. After the heavy snowfall, the snow on the trees should be cleared before the snow to prevent the snow from cooling and causing freezing damage to the fruit trees. Other Medical Implant,Cannulated Cancellous Screw,Cortical Bone Screw,Locking Plate Screw Changzhou Ziying Metal Products Co., Ltd , https://www.ziyingmetal.com