Key points of Comprehensive Management of Pear dormancy period

During the dormant period of pear trees, a small amount of nutrients still flow back in the direction of twig-big branch-trunk-root during the dormant period from defoliation to sprouting in the following year, and accumulate and store in the root system. Before sprouting in spring, nutrients began to flow from underground to aboveground with sap flow, and the order was opposite to that of reflux. Compared with the growing period, the activity of the tree in the dormant period is relatively weak, and the storage nutrition of the aboveground branches is relatively less, which is suitable for winter pruning. The following management techniques should be adopted during this period:

1. Pay attention to scraping off the thick, old and warped skin of backbone branches such as trunk and main branches in time, and burn them centrally to eliminate the overwintering pests in the bark cracks; thoroughly scrape and cure the disease spots of rot and ring disease, and burn them immediately. The trees should be painted white before winter to improve their cold resistance.

two。 Combined with winter shearing, remove disease and insect branches, remove diseased fruits, clean fallen leaves and fruits, and spray a remover throughout the tree.

3. When the water-deficient orchard is in control of day and night freezing, irrigation once in the whole orchard can eliminate a large number of overwintering pests, which is very beneficial for fruit trees to survive the winter safely.

4. In winter, pear trees have no leaves and are dormant, and most of the storage nutrients have been transported to the roots and branches. cutting off useless branches at this time can save a lot of nutrients, which is beneficial to the growth of the tree next year and enhance the tree potential. The main tasks of winter pruning are crown shaping, branch bud adjustment, branch group renewal, straightening out various branch relationships, fixing the growth angle and posture of main branches, adjusting the size, density and structure of fruiting branches, dealing with irregular branches, and controlling the total number of branches and flower buds.

5. The flower buds of pear trees are easy to identify, and the flower buds of big trees are thinned in advance during winter shearing. For too many flower branches, the flower buds are broken or moderately retracted according to the ratio of branches and fruits to reduce the number of flower buds. For young trees, it should be seen that flowers should be kept together, blocked and pruned, which can reduce the consumption of storage nutrients. On the other hand, the vegetative branches were cut short and changed like branches to reduce the formation of flower buds in the coming year. The weak trees with no flowers or few flowers choose high-quality leaf buds and cut off too many inferior leaf buds, which are beneficial to improve the quality of new shoots, enhance photosynthetic efficiency and restore tree potential.