The cover protection method reinforces the shade net and mitigates the cold wind directly invading the seedling shoots. Iron bars, bamboo sheets, etc. can also be used to support arches on seedbeds, covered with plastic membranes to form small arches, and surrounded by soil. If the temperature falls below 0°C, consider covering the grass mats with plastic canopies. Cold insulation effect. Irrigation antifreeze method Irrigation once before the advent of the cold current, can stabilize the temperature, supply moisture during the wintering of seedlings, effectively prevent dry. Flue-curing, cold-proofing, stacking of branches, wet firewood, etc., Covering 8 to 10 cm thick soil layer, making a height of 1.0m ~ 1.5m, the bottom diameter of 1.5m ~ 2.0m of the smoke, burning is not allowed to have Open fire. Spraying potassium fertilizer and antifreeze solution to protect the seedlings with special antifreeze for nursery stock, and to start the cold-resistant exercise of seedlings at the beginning of autumn and winter, spraying 1000 times of potassium dihydrogen phosphate or high content of phosphorus and potassium fertilizer for 10 consecutive days. 3 times, enhance the degree of lignification of seedlings and increase their resistance to winter cold wave. First Aid Box,Baby First Aid Kit,First Aid Kit Box,Basic First Aid Kit Dongguan City Risen Medical Products Co., Ltd. , https://www.risenppe.com