The cover protection method reinforces the shade net and mitigates the cold wind directly invading the seedling shoots. Can also be used iron bars, bamboo, etc. in the seed bed to support the arch, covered with plastic film made into a small arch, surrounded by soil buried strict, such as the temperature dropped below 0 ° C, spray a new high fat film to increase the temperature of seedlings themselves, and then in Plastic sheds covered with straw mats protect against cold and heat.
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.
The general tree seedlings sprayed with potash fertilizer and tree maintenance will be sprayed with general tree maintenance, sterilization, heat preservation, antifreeze and frost protection, which will help protect the seedlings. In the late autumn and early winter, the cold-resistant exercise of the seedlings will be started, and a new high-fat film will be applied every 10 days. Potassium dihydrogen phosphate or high content of phosphorus and potassium fertilizer, 3 times in succession, enhance the degree of lignification of seedlings, and increase their resistance to winter cold wave.
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