1, stop the measures to promote the growth of the upper part of the seedlings. During this period, we should strictly prohibit the pursuit of quick acting fertilizer and prevent seedlings from growing. However, phosphorus and potassium fertilizers can also be applied to promote the lignification of seedlings and form strong spores. In this period, from September, every ten days to half a month, we can use the potassium hydrogen phosphate 1 +0.3% of the potassium dihydrogen phosphate to spray the leaves and spray three times. Or plant ash each time 4-5 mu per mu, continuous two times. Spraying boron on the leaf surface improves the cold resistance. Starting from September, sprayed with borax solution of spring rain 1 +0.5% or mixed with potassium dihydrogen phosphate every 10 days. Three times.
2, the management of the garden. In autumn and winter, it is necessary to clean up the nursery land in an all-round way, dredge and excavate the drainage ditch, combine pruning and pruning, cut off the dead branches and diseases and insect branches, and remove the dead plant and clean the litter and weeds in the nursery. We should strengthen the prevention and control of diseases and insect pests, and carry out comprehensive pest control in the whole garden during the dormant period with the mixture of 2-5 degrees of sulphur and sulphur.
3, do a good job of cold prevention and cold resistance. The concrete measures are as follows:
(1) irrigation and antifreeze. On the eve of the frost, irrigation in the nursery area can make the soil temperature not less than 0 degrees.
Fumigating smoke and preventing cold. In particularly cold weather, there are 2-3 smoke pits around the nursery. When the temperature drops to 0 degrees C, smoke is lit and the smog goes up until sunrise.
Coverage: it is mainly used for flowers in the open field, covering hay and straw mat before the frost. This method is both economical and effective, and is widely used. It can also cover plastic film and other materials, but there must be some economic conditions.
4. Trunk protection: common for trunk and white. 1. trunk Parcels: most of them are done before winter. The trunk of the newly planted or cold resistant varieties will be wrapped or wrapped with a straw rope or a sack piece. The height can be about 1.5 to 2 meters. 2. tree trunks are white: usually in autumn, white on the tree trunk with the whitening agent of the fast forest, the white reflection of the sun, reducing the absorption of the sun's heat by the trunk of the tree, reducing the temperature difference between the trees and the trunk of the tree, and preventing the freezing of the bark. In addition, this method has certain effect on preventing pests.
(5) spraying fast forest antifreeze: before falling leaves in autumn, after picking fruit, 3 to 5 times of "fast forest antifreeze" can be sprayed to all kinds of greening trees and shrubs, so that the resistance and frost resistance of the trees can be improved and the frost damage can be prevented.