How to improve the quality of Kyoho grape

Kyoho grapes are one of the main varieties in production. In recent years, due to one-sided pursuit of production, management can not keep up and other reasons, so that the decline in quality, affecting its product value and market competitiveness. Therefore, it is necessary to start from limited production and quality improvement and pay close attention to comprehensive management so as to improve the quality of Kyoho grapes. The technical measures are as follows:

First, scientific fertilization irrigation. Kyoho grape has higher requirements for fertilizer and water conditions, and has a stricter ratio of N, P, and K. Generally, for every 100 kilograms of berries increased, 1 kg of nitrogen, 0.3 kg of phosphorus, and 1 kg of potassium need to be added. Therefore, adding organic fertilizers, followed by foliar fertilizer is beneficial to improve fruit quality. In the growing season, it is necessary to control the amount of nitrogen fertilizer and increase the amount of phosphorus and potassium fertilizers. In the early stage of berry growth, 1-2 times of available nitrogen fertilizer can be sprayed; at the end of May, 0.2 kg of potassium sulfate per plant is used in combination with irrigation; 0.3% of potassium dihydrogen phosphate is sprayed once per month before and during the harvest. It is necessary to ensure sufficient water supply from the sprouting of the grapes to the coloring of the berries, and irrigation should not be done for 2-3 weeks before harvesting.

Second, reasonable pruning. Using stand and cultivar cultivation, leave 2-3 main vines per plant, use mid-length shoots for winter cuts, and use short shoots as much as possible to keep 6-8 results per square meter. , and note staggered up and down. Pay attention to summer trimming, new shoots interval 8-10 cm, to ensure ventilation and light. Pick up the shoots in time, leaving 1-2 leaves to pick up the heart.

Third, thinning and thinning fruit. One of the major causes of the decline in the quality of Kyoho grapes is excessive production. Therefore, to limit the output, 2000-2500 kg per mu. Through reasonable loading, thinning (ordering) thinning fruit (spike), adjusting the appearance of the tree to maintain the tree potential, to achieve high yield and stable quality. Extension branches and weak branches generally do not leave ear, mean tree branches leave 1 ear, strong branches leave 1-2 ears. The effective leaf and ear ratio is 15-20:1. Before flowering, remove 1/5-1/4 of the inflorescence tip and first spike. After the fruit enlargement, small particles, diseases, insects, and cracked fruits will be removed.

Fourth, fruit bagging. Bagging can effectively reduce the incidence of grape pests and diseases, ensure that the fruit is not polluted by pesticides, birds, bees, etc., make the skin bright, bright color and improve quality. Sacking is usually performed after the fruit falls from the grapes. When the size of the mung bean is large, the whole tree is sprayed with 70% thiophanate-methyl 1000 times after the whole fruit is thinned. After the medicine is dried, it can be bagged, and then it can be covered with a thin wire or The string fastens the mouth of the bag to the new shoot or to the adjacent vine. Remove bags 2 weeks before fruit harvest. Use special grape bags or homemade paper bags.

Fifth, timely harvest. Kyoho grapes generally grow in purplish to black-purple berries, and the fruit can be harvested when it basically shows the inherent quality and flavor of the variety. Precocious fruits with poor coloration, low sugar content, high acid content and poor quality. Picking should be sunny morning morning dew or afternoon. When picking, hold the handle with your hand and cut the ear with another hand to avoid touching the fruit and rub the fruit powder on the fruit surface.

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