Management Points for Efficient Cultivation of Jufeng Grapes
The website introduces the management points for efficient cultivation of Jufeng grapes in terms of green plants. Next, the editor of this site will provide an introduction for everyone.
Management Points for Efficient Cultivation of Jufeng Grapes
Jufeng grapes are a famous grape variety. They love fat and water. The fruit has large clusters and large berries. The flesh is soft, sweet, and juicy. It has a strawberry flavor. Many people enjoy eating them. The market prospect is good. Next, we will learn the key points of Jufeng grape planting and management techniques.
Strengthen Fertilization and Water Management
Jufeng grapes have strict requirements for fertilizers. For every 100kg harvested, it generally requires 1.5kg of pure nitrogen, 1.0kg of phosphorus, and 1.5kg of potassium; at the same time, adequate water during the berry growth process can increase fruit size and yield. However, if excessive irrigation occurs from berry coloring to maturity, the fruit will have low sugar content, high acidity, poor coloring, and easy cracking, leading to gray mold and late rot diseases, which will affect the color, aroma, and taste of Jufeng grapes, reducing quality. Therefore, appropriate irrigation should be carried out, especially 15-20 days before harvest.
Control the amount of nitrogen fertilizer and increase the application of phosphorus and potassium fertilizers to prevent excessive plant growth, shading of leaves, poor ventilation, insufficient light, and the inability of grape berries to grow and mature normally, resulting in brittle pedicels, thin skin, and poor resistance to various pathogens. Therefore, during the berry coloring period, an 800-fold solution of potassium dihydrogen phosphate should be sprayed on the leaves every half month to improve berry quality. After the leaves fall in autumn, apply 2000-3000 kg of 2% phosphorus fertilizer per mu. At this time, the higher soil temperature is favorable for the decomposition of organic fertilizer and the absorption and utilization of nutrients by the roots.
Reasonable Pruning
Not pinching the tip of the cluster will cause the nutrients (G-Y) to be scattered, and the size and maturity of the fruit will vary. In winter, the fruit is gently cut, and the branches and vines are numerous. As a result, the fruit part quickly moves upward, and the clusters are concentrated in the upper part of the shelf. Due to excessive load and uneven distribution, it is difficult to form high-quality fruit. Therefore, before flowering, the main branches of Jufeng grapes should be pinched in time, and the secondary branches should be cleaned, so that more nutrients can be transported to the flower organs. At the same time, some inflorescences should be retained, and 1/4-1/5 of the tip should be pinched off 3-5 days before flowering to concentrate nutrients on the remaining fruit grains. In winter, medium and long branches should be pruned, with about 10-15 new branches left per square meter of surface area. Space them up and down to ensure that each grape cluster grows 15-25 leaves, and control the yield to within 2500 kg per mu. In this way, the clusters are compact, the berries are uniform, mature uniformly, and the flavor and color of the berries are improved.
Disease and Pest Control
In spring, spray a mixture of 5-kyuuzu stone-sulfur before Jufeng grapes germinate to prevent powdery mildew and felt disease; after flowering, spray an equal amount of Bordeaux solution every week to prevent black spot; starting in early June, spray 600-800 times of 50% bromide** ester every 10-15 days, 400 times of phosphine aluminum to prevent downy mildew, and 1000-1500 times of 40% dimethoate to control floating dust and other pests. If grape borers are found on branches, pour 50% diazinon into the borer holes and then seal the holes with clay. To prevent grapes from being contaminated by pesticides, stop spraying pesticides about half a month before harvest.
Timely Harvesting
Jufeng grapes have a growth period of 130-150 days and an effective accumulated temperature of 3000-3200℃. Under appropriate cultivation measures, they generally start to change color in early July and mature in late August. By late August, the berries are purple, with a sugar content of over 15% and an acidity of 0.6%-0.8%, and a rich flavor, indicating they are ready for harvest. To reduce the infection of gray mold, spray a 700-800-fold solution of methyl before harvesting 7-10 days earlier to reduce the incidence of Jufeng grapes during storage and sales.
Harvesting should be done in the morning or afternoon after the dew has dried, avoiding overcast or foggy days to minimize the high temperature and humidity brought from the field. Also, handle the fruit gently and avoid breaking the berries and wiping off the fruit powder.
The detailed explanation of the management points for efficient cultivation of Jufeng grapes introduced above is for reference and suggestion only!