Key Points of Grape Top Pinching and Heart Removal Technique
A little knowledge of life, introducing the key points of grape top pinching and heart removal technique and teaching you the pruning methods of green plants and flowers. The following editor will provide you with detailed answers.
Among all the agricultural operations of grapes, the heart removal operation is undoubtedly a very important operation. If the operation is done correctly, it can greatly help to improve the fruit setting rate!
Pinching can temporarily inhibit the growth of new shoots, reduce the nutritional competition between new shoots and inflorescences, and promote the development of ovaries and reproductive growth.
Moreover, pinching can enhance the nutritional metabolism in flowers, active protein synthesis in the development process of ovules and ovaries after fertilization, which is crucial for the fruiting rate of grapes.
Usually, medium trees, strong trees, trees with vigorous new shoot growth, and trees with a tendency to run wild need pinching and topping.
For weak trees, there is no need for pinching and lateral shoot management before flowering, as they grow slowly, have no lateral shoots, and the internodes of the main shoot do not fully extend. It is more important to take measures to strengthen the tree's vigor.
How to operate pinching? The grape sister wants to talk to everyone about it, let's learn and progress together...
How to Pinch the Rooted Seedlings of Grapes?
The definition of rooted seedlings: newly planted seedlings are called rooted, that is, the first year of grapes.
When the buds germinate, the grafted seedlings should promptly remove the buds below the grafting joint to prevent the growth of suckers (new branches called suckers from hidden buds on the ground) from consuming nutrients and affecting the germination of the scion buds and the growth of new shoots. When the seedlings grow to 1 meter high or have 8-10 leaves, the main shoot should be pinched and the lateral shoots should be treated. First, remove the lateral shoots below 30-50 cm from the ground (if a trellis is built, all the buds below the trellis are removed), leaving 1-2 leaves repeatedly pinched, and for stronger lateral shoots, leave 4-5 leaves repeatedly pinched for control. When the elongated shoot of the main shoot grows another 8-12 leaves, pinch it again. In this way, the seedlings can be pinched three times in the same year.
By repeatedly pinching multiple times, it can promote the thickening of seedlings, lignification of branches, and flower bud differentiation.
But be careful, in the first year, only one main stem (main vine) should be cultivated, and it should be allowed to extend and grow thick and strong. As long as the diameter of the main stem reaches more than 1 cm, it will definitely bear fruit well next year.
How to Pinch Conventional Grape Trees?
Pinching period: about 4-7 days before flowering. Pinching method: generally, leave 6-7 leaves above the inflorescence to pinch the fruiting branches.
Leave 10-12 leaves to pinch the nutritional branches, and the elongated branches can be left longer (new shoots that grow from the winter buds of the fruiting branches are called new shoots.
New shoots with fruit clusters are called fruiting branches, and new shoots without fruit clusters are called developing branches or nutritional branches).
The stronger the pinching, the better the fruit setting, but excessive pinching can lead to insufficient leaf area and can even stimulate the rapid growth of new shoots, which is not good for the growth and development of the plant.
Therefore, for strong-growing varieties or new shoots, only the soft tip of the unexpanded top of the new shoot should be pinched off.
Schematic Diagram of Pinching
After pinching grapes, due to the shrinkage of nutrients, the lateral shoots start to grow quickly, and usually, the lateral shoots below the inflorescence of the fruiting branches are all removed.
The lateral shoots above the inflorescence and the lateral shoots of the nutritional branches can be pinched with 1 leaf left, and the elongated lateral shoots (the lateral shoots of the top 1-2 nodes of the new shoot) can be pinched with 3-4 or 7-10 leaves left (depending on the size and length of the trellis), and this method is repeated.
Be careful that the treatment of lateral shoots of strong new shoots should not be too severe. Try to pinch lightly and promptly. When multiple leaves have expanded, only the tip of the shoot should be pinched to avoid causing closure and the lateral shoots must be treated frequently.
The above content about the key points of grape top pinching technique and teaching you the pruning methods of grapes can be used for reference by green plant enthusiasts.