We have been doing a good job in preventing cold of fruit and other crops. In the near future, the temperature in our country has dropped significantly. According to the relevant weather forecast, the temperature will drop sharply in mid-December, and it will have some adverse effects on the overwintering of fruit trees. All localities must do a good job in cash crops such as fruit tea. Prevention of cold and freezing damage,...
Recently, the temperature in our country has dropped significantly. According to the relevant weather forecast, the temperature will drop sharply in mid-December. It will have some adverse effects on the wintering of fruit trees. All localities must fully prevent the cold- and freeze-fighting of cash crops such as fruit tea to ensure safety. winter.
First, timely picking of un-harvested fruit to prevent loss from freezing injury. If the fruit is not picked yet, it must be grabbed in time. For the kumquats left in the tree, timely use of thin film cover trees and tree trays to reduce the harm.
Second, wolfberry is currently in the flowering young fruit period, we must pay close attention to fruit bagging, tree cover, or film cover tree, or spray 100-200ppm920 (spray spike), to prevent flowers or young fruit frozen.
Third, strengthen post-harvest management of fruit trees, improve the ability of the tree to withstand cold
1, timely application of winter fertilizer, post-harvest top dressing, recovery of tree vigor;
2, in the fruit trees between the cover crop straw, leaves or in the diameter of 1 meter around the laying of plastic film, to increase the temperature;
3, for the characteristics of the roots and neck of fruit trees susceptible to freezing, the cultivation of fruit trees 15 cm, open the spring and then open;
4. Before the big freeze comes, wrap the stems and main branches with straw ropes, or wrap the trunks of the trees with straw;
5. Main trunk whitening, on the main trunk of fruit trees, especially the trunk 0.5m above the ground, use lime 1.5kg, salt 0.2kg, sulfur powder 0.3kg, grease a little (to avoid rain), 5 kg of water, mix into a paste solution The whitening agent is used to dry the brush, which reduces the radiation temperature caused by the thawing of the ground when the sun is in use and causes the temperature difference to damage the trunk;
6, in case of long-term dry, frozen before spraying or freezing cold water spray, the use of water freezing to release a large number of latent heat principle, in the frozen soil before the "frozen frozen" when the fruit trees irrigation (water to be filled ) Or spray water when frost damage will occur, so that the ground temperature remains relatively stable, thereby reducing the freezing injury;
7, smoke antifreeze, the weather is used at night to cool, with oyster shell, broken straw and so on. Light up at around midnight, pay attention to controlling the fire, and use dark smoke as appropriate. In general, 3-4 fire points can be spotted per orchar orchard so that the smoke can cover the orchard in order to slow the cooling and cooling of the ground and increase the heat in the air. It has been determined that smoking smoke generally raises the temperature by 3-4°C. In the low-lying orchard where winter cold air tends to accumulate, the method is particularly effective;
8, the early cold or cold before the day, artificial canopy spray steam insulation agent, improve the tree juice concentration, enhance cold resistance, so that the foliage is covered with a layer of film, inhibit water evapotranspiration, can play a role in antifreeze, but light Degree of deciduous phenomenon;
9. Shake off icicles or snow in time in freezing or snowy weather;
10. Strengthen the management and protection of the seedlings and young and middle-aged gardens, put up scaffoldings or cover them with straw to prevent freezing and freezing;
11, in case of long-term low temperature and rainy weather, pay attention to orchard clearance and temperature.
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