How can the autumn seedlings effectively protect the cold
Fall tree planting can solve the problem of short spring planting time, spring drought, and labor shortage in spring and has been widely promoted. However, many autumn planting seedlings failed to adopt reasonable measures for preventing cold and failed to safely pass winter, which affected the survival rate of seedlings. According to the practice, the author summarizes a set of cold-proof technical measures for autumn planted seedlings, which are presented below for reference. Second, cover film method For less hardy tree species, such as magnolia, Ligustrum lucidum, Eucalyptus, Euonymus japonicus, Euonymus japonicus and other tree species, can be taken to cover the film, is divided into two kinds of trees and shrubs introduced. The trees should be wrapped with straw ropes and then covered with a thick agricultural film sleeve from the top to the roots. The top must be tightly sealed. The plastic film must be wide and it must not cling to the trunk. It is surrounded by bamboo sticks. After the roots are filled with frozen water, roots and stems, etc., they can be covered with straw or straw, corn stalks, sawdust, etc., and finally covered with plastic film. Shrubs and shrubs are relatively low in height and are less affected by wind force. The roots and crowns of seedlings can be insulated by two flexible bamboo strips (about 3 cm in width). The two ends are sharpened and intercalated on the four sides of the plant. The top of the bow is about 15 centimeters from the top of the plant, about 10 centimeters from the side of the plant, and 4 to 6 centimeters into the earth when the bamboo strip is inserted, then covered with the agricultural film. After the cover of the agricultural film is covered, cover it with soil again. Matters needing attention Covering time and film removal time should be subject to weather conditions. Filming time is best when the initial frost, the film should be uncovered after the temperature is basically stable, the tree began to sprout. In sunny weather in winter, it is appropriate to remove the membrane for ventilation and supplement oxygen. If there is a hole in the film, supplementary measures should be taken to prevent the plant from being frosted. Snow days should promptly clean up the snow accumulated on the roof so that plants can receive light.
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First, conventional cold methods
For cold-resistant species such as white wax, cephalophorus, platanus, etc., after autumn planting, cold-prevention measures such as cold pre-irrigation, rhizome-cultivation, soil-covering, white-painting, grass-wrapped ropes, wind barriers, etc. may be adopted. All the trees planted in the fall must be coated with white and wrapped ropes. The wind barriers can be determined based on the cold resistance of the plants, the winter temperature conditions and the microclimate environment. One of them can be selected and used interchangeably. 