To protect the exposed 1-2 year old saplings that cannot be safely overwinter in open fields, the entire tree body is bent to one side and covered with soil. This method is the most effective and reliable measure to prevent pumping.
Cultivate soil and protect against cold. Cultivate a mound within 30 cm of the base of the seedlings to prevent frostbite and grafting. After the spring temperature has risen and stabilized in the spring of next year, it will be removed and the tree plate will be leveled.
Whitening and anti-cold sapling whitening can ease the temperature difference between the yin and yang surface of the trunk. The cold-proof effect is better. It can be applied before the soil is frozen. The formulation of the whitening agent is: salt 0.5 kg, quicklime 6 kg, clean water 15 kg, and then add the appropriate amount of adhesive and lime sulfur residue coated over the young branches.
PVA is dried and evenly coated with a retort of polyvinyl alcohol. The tanning method is generally performed at a ratio of "polyvinyl alcohol:water=1:15 to 20". Heat the water to about 50°C, then add polyvinyl alcohol (cannot wait for the water to boil and then add, otherwise the polyvinyl alcohol can not be completely dissolved, the solution is not uniform), with stirring and stirring, until boiling, and then use slow fire After 20 minutes to 30 minutes, wait for the temperature to drop until it is hot. Http://
Tetanus Toxoid Vaccine,Toxoid Vaccine,Hep B Immune Globulin,Immunoglobulin Injections,Tetanus Antitoxin,Varicella Vaccine
FOSHAN PHARMA CO., LTD. , https://www.fospharma.com