In winter, frequent cooling, effective measures should be taken to reduce the adverse effects of low temperature on vegetables. 1. Strengthen coverage, keep warm and prevent freezing. On the evening before the low temperature comes, straw, sunshade nets, plastic films and other materials are covered on open-air vegetables to block frost, increase ground temperature, and prevent freezing damage. Greenhouse vegetables can be buckled with small arches, covered with film at night, and covered with grasshoppers. The skirt of the greenhouse is covered with a plastic film as an apron to reduce the cold air at the bottom, and at the same time, it is necessary to block all gaps and minimize heat dissipation. A double-layer shade net can be added to the north of the greenhouse to form a windbreak and reduce the occurrence of frost damage. After the sun shines (8 to 9 am), the cover is removed in time to allow the greenhouse to be fully warmed by light. 2. Fertilize soil and increase soil temperature. Choose warm fertilizers such as cow dung, pig manure and compost during the sunny day in the vegetable rhizosphere. This will increase the soil temperature by 2 to 3°C. Combined with cultivator soil before freezing, the depth of cultivator is 7 to 10 cm. 3. Clear trenches to prevent waterlogging. Low-lying vegetable fields should ensure that the ditch is open. After the rain and snow days, the snow on the sheds and sheds should be cleared in time to clear the ditch and remove accumulated water to prevent the snow from melting to reduce the temperature of the shed and increase the vitality of the roots. 4. Control nitrogen sprinkling ash, improve the ability of plants to resist cold. During the seedling period of vegetables, nitrogenous fertilizers must not be applied to prevent young plants from growing young and have poor cold resistance. You can spray 0.2% potassium dihydrogen phosphate solution 2 to 3 times. Before the advent of low temperatures, spreading a layer of turfgrass in vegetable fields can prevent cold and increase frost resistance. 5. Cut off dead branches to prevent disease. Timely cut frozen leaves. After the vegetables are frozen, they are prone to diseases and can be sterilized with a fumigant in the shed. In case of rainy weather, it is necessary to open and circulate the air around the noon, reduce the humidity in the shed, and reduce the occurrence of diseases. 6. Timely harvesting to reduce loss of frost damage. Doxycycline Hyclate Soluble Powder Doxycycline Powder,Doxycycline Soluble Powder,Doxycycline Hydrogen Fumarate Powder,Doxycycline Animal Drug Shandong Shengli Bioengineering Co., Ltd , https://www.shenglipharm.com