After the harvest of the sweet cherry, the thinning, thin and weak branches and the diseased shoots that have grown up have to be removed or shortened so as to open the light path and enrich the shoots to reduce unnecessary consumption, which is favorable for flower bud differentiation and shoots. mature. Mainly for strong trees, closed trees, should be carried out from the top down. When the branches of the upper branches are too heavy, they cannot be put in one place. They should be divided into two parts. Each time there are 1 to 2 branches, the interval time is 1 month. The thin and weak branches behind the internal defects must be sparse. In addition to; on the back of the dense tip to be removed once.
The tip of the twisted tip is a semi-lignified, vigorously grown shoot, the competing branch twists 180 degrees, weakens its growth, promotes flower bud differentiation, and transforms into a result stick. After the shoots are still growing more prosperous, they must lightly pick hearts and inhibit growth. The lightening of the tip can lighten the tree's vigor, but the uniaxial extension of the secondary tip occurs after picking.
Topping the heart is to remove the young part of the tip before the shoot is still lignified, which is called topping. It is one of the most widely used methods for sweet cherry summer trimming. Sowing of young trees can promote more shoots and promote flower bud formation. Topping the tree in the early fruit period and full fruit period can save nutrition, increase fruit setting rate and fruit quality.
Pulling the branches to the place where there is space, the branches will make up for the lack of backbone branches. It can accelerate the formation, delay the growth of the shoots, improve the illumination of the inner canopy, and promote flower bud differentiation. In the vertical direction, the main branches should be maintained at 80 to 90 degrees; the overlapping branches can be pulled horizontally to the right direction; the spacing between the main branches in the same direction should reach 80 to 100 cm.
The timely control of Wangshu can not inhibit growth after adopting various summer shearing measures. It should timely spray 200-300 times paclobutrazol or 180-200 times PBO for control. Wangshu spray 2 to 3 times can receive better inhibition.
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