How to prevent frost

Preventive measures for frost: \ x0d \ x0d \ 1. Irrigation methods. It can increase the air humidity near the ground, protect the ground heat and raise the air temperature. Irrigation can increase the humidity of air near the ground, protect geothermal energy and raise the temperature (which can be increased by about 2℃). Because of the large heat capacity of water and slow cooling, the site temperature will not drop rapidly. For small area garden plants, water spraying can also be used. The method is to spray water on plants continuously with sprinkler irrigation equipment 1 hour before frost comes. Because the water temperature is higher than the air temperature, when the plants are cold, the water will release heat, and the water temperature is higher than the freezing point to prevent frost, and the effect is better. \ x0d \ x0d \ II。 Covering method. It can not only prevent the attack of cold air from outside, but also reduce the loss of geothermal energy. Cover plants with straw, wheat straw, plant ash, weeds, nylon, etc. It can not only prevent the attack of cold air from the outside, but also reduce the loss of geothermal energy, and generally increase the temperature 1-2℃. Some dwarf plants can also be buried in the soil to prevent freezing injury. This method can only prevent a small area of frost, and its advantage is that it takes a long time to prevent freezing. \ x0d \ x0d \ III。 Fumigation method Smoke can prevent the loss of heat on the ground, and smoke itself will also produce some heat. Half an hour before the frost comes or 1 hour, light it with firewood, cow dung, sawn wood, waste engine oil, red phosphorus or other dust and smoke substances that can produce a lot of smoke. These smog can block the loss of heat on the ground, and the smog itself will also generate some heat, which can generally raise the air temperature near the ground by 1-2℃. However, this method has certain weather conditions, high cost and air pollution, and is not suitable for universal promotion. It is only suitable for preventing short-term frost and the use of rare trees and their nurseries. \ x0d \ x0d \ IV。 Fertilization method. Organic fertilizer can improve soil structure and enhance its heat absorption and insulation capacity. Applying organic fertilizer early before cold wave, especially using semi-decomposed organic fertilizer as base fertilizer, can improve soil structure and enhance its heat absorption and insulation performance. You can also use the semi-decomposed organic fertilizer to emit heat in the process of continuing to decompose, thus increasing the soil temperature. After winter, warm fertilizer can be used to cultivate forest plants, and the antifreeze effect is obvious. Warm fertilizers are commonly used, such as manure, compost and plant ash. This method is simple and feasible, but it should be applied 3-4 days before the frost comes to master the local climate law. After winter, lime water can be used to whitewash the trunks of trees and fruit trees to reduce heat dissipation.