1. Early application of base fertilizer: fruit tree base fertilizer (also known as Yangfei fertilizer) is an important measure to restore tree bud formation in the next year. Pear trees should be in August-September, citrus 10-11 months, and organic fertilizers, preferably containing amino acid, humic acid, seaweed fertilizer and other organic compound fertilizers that can increase the ability to resist freezing.
2, the trunk brush white: whitening agent preparation method: use 10 kg of quicklime, 1 kg of sulfur powder, 0.2 kg of salt, add water 30 ~ 40 kg, stir evenly, adjust into a paste, brush the trunk from late November to late December . The old skin on the main trunk and the main branch is scraped off, and then the main stem and the bare main branch and the backbone branch are whitened.
3, between the rows of grass or film, canopy cover: cover the rice straw film within 1m around the trunk to keep warm and cold; crown cover: before the arrival of large ice, if the tree in the peak period can be covered with a canopy cover the shade network or film ;
4, timely adjustment of water: before the freezing of irrigation: about one month before the arrival of the winter to fill the water; after the occurrence of freezing damage, timely drainage.
5. Shake the snow: Shake it off in time or use a long stick to break the snow on the crown to prevent the snow from breaking the branches.
6. Foliar fertilization: Spray 0.3% potassium dihydrogen phosphate + seaweed (or amino acid, humic acid) fertilizer + chelated zinc 500 times before and after each cold current.
7. Temporary pruning: After thawing, the injured tree branches are trimmed in time.