Mr. Xin of Lubei District, Tangshan City asked: What are the reasons for the absence of shoots in the middle of the main grapevine? How to remedy it?
The author believes that grown-up vineyards generally have varying degrees of baldness in the middle of the perennial branches. Phenomenon, the buds on these parts of the shoots can't germinate or germinate, and they can't extract new shoots, resulting in vacant racks and space. Get full use, and then affect production. The middle part of the grapevines is always bald, causing tree-like disorders, debilitating tree branches, and dendritic renewal.
There are many factors that cause the buds of the middle branches to fail to germinate. The new shoots are left with long, excessive results, lack of fertilizer or excessive nitrogen, unreasonable summer cuts, unused secondary shoots, new shooters, unrealistic foliage, overt foliage, and insufficient light. Such will cause the bud eyes to not germinate.
When this happens, the following remedial measures should be taken:
1. Leading blanks. In the branch of the "disjointed" dendrite branch, the long shoots are suitably left in the winter shearing period, and the shoots are bound to the bare space after the buds grow, and the branches are filled.
2. Retire updates. Baldness in the front of the main vine can be cultivated in the back of the main vine. When the new vines can replace the old vines, the winter shears are retracted and renewed.
3. Bow vines. The baldness of the front of the band grows robustly. When it is put on the shelf in early spring, the bald area can be tied into an upward bow shape. The growth polarity of the grapes can be used to induce budding of the arched buds. Such as induction success, when the bud grows to about 15 centimeters, the arch-shaped parts tied flat, and timely picking heart and auxiliary tip processing, training new branches.
4. Short cuts. For the weak branches of bald areas, 2 to 3 short cuts are required to allow the re-emergence of good branches in the following year in order to better rejuvenate the old vines. If the branches are thick, then the long branches can be picked up and cultivated into the resulting mother and female vines.
In addition, we must strengthen the vineyard's soil and fertilizer management, improve the overall tree vigor; carry out sparse flowering and fruit thinning, reasonably regulate the load, and reduce the ineffective consumption of nutrients; appropriate shearing during winter shearing, shearing the results of vines can not be too long or too much During summer cutting, sparse or retracting dense growth branches, overlapping branches and leggy branches, timely picking up the heart and handling the auxiliary shoots, so that the lighting conditions of the shelf surface are good, and lay the foundation for the dendritic tissue enrichment.