Why navel oranges need to "sweep spring shoots and summer shoots"
For the navel orange trees one year before or after they are put into production, “smooth spring shoots and summer shoots†is an important measure to increase fruit production. However, because many farmers will not use or implement improper methods, they will not only fail to achieve the expected goal of high yield, but will result in the consequences that the navel orange has a small crown, less foliage, and lower yield. The scientific operation method of “discharging spring shoots and summer shoots†is described below as reference for fruit farmers. 1, sparse spring shoots. The result is that the navel orange tree is appropriately removed from the spring shoots, so that it can play a role in promoting fruit production and protecting fruits. Adult results Navel orange trees, less spring shoots and important results in the second year of the mother branch and the base of the autumn shoots, the amount of thinning spring shoots should be light, generally eradicating late shoots; early results of young navel orange trees , is in the vegetative growth to reproductive growth transformation stage, should be sparse spring shoots, in order to promote adequate autumn shoots, as the result of the next year the mother. Specific elimination methods: First, the amount of sparse should be due to trees and appropriate, generally remove 40-60% of the spring shoots; second, the branches of the flower buds on the branches of spring shoots should be sparse, can be sparse 1 /3-1/5, and to eliminate some of the poor quality and redundant flowering branches, in order to stabilize the flower steady fruit; the spring branch of the spring shoots on the branches less fruiting branches should be light or sparse, can be 2-3 When picking leaves topping, in order to reduce nutritional contention and promote fruit development; Third, the spring shoots without flowers and fruitless branches, generally not sparse or less sparse, to ensure that there are enough branches as the result of the next year the mother of the branch or the autumn shoots of the base , conducive to the next year's flowering results; the fourth is to Wangshu spring shoots should be more sparse, sparse branches; the weak tree spring shoots should be sparse or not sparse, weak branches; on the spring tree shoots of the golden mean mainly weed out weak branches, keep Tree vegetative growth and reproductive growth balance. 2, wipe summer shoots. In the young and mature trees that are put into production, too much hair extract in summer shoots will cause competition conflicts between shoots and fruit, causing severe secondary physiological fruiting and greatly affecting the yield increase. The summer shoots must be wiped out in time. The method is: the empty parts of the canopy or the summer tips that need to expand the crown can be preserved. Only 6-8 leaves are needed to pick up the heart to promote branching and replenish the canopy; the rest of the summer shoots grow to 2- All 3 cm long erased, wiped every 5-7 days, until the release of autumn shoots 3, grasping matching. Navel orange shoots summer shoots must also grasp two complementary measures: First, to strengthen the roots outside the fertilization, spring shoots, flowering period, spraying "0.2% boric acid or borax +0.3% potassium dihydrogen phosphate +0 .3% urea "mixed fertilizer solution, spraying once every 7-10 days, even spraying 2-3 times to promote the growth of spring shoots and preserved fruit; second is the emphasis on summer pruning, the results of the tree sparse most of the spring After shoots and summer shoots have been reduced, the number of branches and leaves and the year-old branch of autumnal shoots or autumn shoots are reduced. A summer cut should be carried out in time to promote the development of a large number of autumn shoots as a result of the mother shoots and guarantee high yields in the coming year. The pruning period is generally in mid-late July. The amount of pruning is appropriate to tree vigor. Before 3-5 days of pruning, the nitrogen, phosphorus and potassium compound fertilizer is reapplied, which promotes neat and vigorous autumn shoots. At the same time, it is necessary to control the leaf miners and Locust damage.