How to prune a grapevine to increase fruit yield: Grapevine management and pruning techniques.

How to prune grapevines to increase fruit yieldMain content introduction: This article explains how to prune grapevines to increase fruit yield, as well as the management and pruning techniques for grapevines in the greenery and flower industry. Please refer to the detailed introduction below.Grapevines naturally enter a dormant period around October and enter a deep dormancy period by November. In addition to applying base fertilizers and other management practices during this time, it is also the time for shaping and pruning the grapevines. The pruning techniques for grapevines need to focus on the following four aspects.1. Pruning techniques for trellis cultivation: Grapevines grown on a trellis, with a height of about 150 centimeters and a planting method from north to south high, should adopt a regular fan-shaped pruning. Generally, each grapevine retains 2 to 4 main vines, with 2 to 3 fruiting branches on each main vine. The fruiting branches should be pruned according to the medium-long shoot method, leaving the preparation branches with two buds and cutting the rest short.2. Pruning techniques for small arbor cultivation: For grapevines grown on a small arbor, the trellis should extend towards the center from south to north or other directions, ensuring a distance greater than 50 centimeters between the trellis and the greenhouse film. The dragon-shaped pruning technique can be used. Each grapevine retains 2 to 3 main vines, spaced about 40 centimeters apart, with a fruiting branch every 30 centimeters on each main vine. About 12 fruiting branches can be retained per square meter, and the excess should be cut off.3. Pruning techniques during the grapevine growing season: In greenhouse cultivation of grapevines, there may be phenomena such as excessive growth of new shoots, resulting in uneven growth. Pruning can be carried out during the grapevine growing season, with attention to maintaining the density of branches. The total number of branches retained in greenhouse cultivation should be 25% less than in open-air cultivation. Twisting excessive growth branches can control strong growth and promote balance with new shoots.When setting the shoots, it is important to retain more robust fruiting new shoots and reserve some preparation branches. The density of new shoots should be about 13 per square meter, with proper guidance for new shoots. For new shoots not retained for secondary fruiting, leave about 6 leaves on the fruit cluster for topping, retain the top two leaves of the lateral shoots, and apply multiple topping controls. Other excess branches should not be retained.4. Pruning techniques after multiple fruiting of grapevines:1. Pruning technique to let winter buds sprout and bear fruit: About 4 days before grapevines bloom, cut off the strong-growing new shoots, leaving about 8 leaves on the fruit cluster for topping. Retain one lateral shoot at the top and cut off the rest. About half a month later, cut off all lateral shoots, which will allow the winter buds to sprout and bear fruit.2. Pruning technique using summer bud lateral shoots for fruiting: Half a month before grapevines bloom, select some strong new shoots and only retain the top 2 to 3 un-germinated summer buds for topping. If the summer bud lateral shoots germinate, they should all be cut off. If the retained summer buds sprout without inflorescences, leave a couple more leaves for topping. The secondary lateral shoots that emerge will mostly produce fruiting inflorescences.3. Low-temperature method to promote dormancy: After pruning grapevines in autumn, apply a frost protection water thoroughly and manage the greenhouse before frost. During this time, there is no need to uncover the insulation layer during the day, and ventilation and cooling can be done at night to control the humidity inside the greenhouse, allowing it to pass through natural dormancy smoothly.Conclusion: Pruning grapevines is different from other fruit trees. It can retain the main vines according to different cultivation methods, keep the number of fruiting branches on the main vines based on the density, increase the lateral shoots on the fruiting branches, and apply topping control promptly to allow more fruiting branches to emerge, thus increasing the yield of grapevines. The above pruning techniques for grapevines have been explained comprehensively, allowing you to master them in less than 10 minutes. The specific introduction provided above on how to prune grapevines to increase fruit yield and the management and pruning techniques for grapevines can be used as a reference for netizens.