prune
â‘ Pruning period. The winter shear period of grapes grown in greenhouses should be carried out after the grape plants have fallen completely into dormancy after the leaves have fallen, and they are generally completed from mid-December to the end of December, which affects their subsequent management work too late.
â‘¡Pruning method. The specific method of pruning is determined according to the different cultivation styles, the characteristics of the variety, and the strength of the tree vigor.
Clear garden disinfection
â‘ Clear garden. After the grapes are trimmed, all the litter in the garden are removed and the old skin on the trunk and main vines is burned and buried intensively to reduce the source of disease.
â‘¡ Disinfection. Use Baume 2 ~ 3 degree stone sulfur mixture plus 0.5% sodium pentachlorophenol to spray disinfect the ground, scaffolds and plants in the garden. In early February, the plants were sprayed again with 0.5 ~ 1 degree stone sulfur mixture and 0.2% sodium pentachlorophenol during the sprouting period of the plant to eradicate the disease source.
Lime nitrogen treatment
Treating grape shoots with 15% ~ 20% lime nitrogen solution after winter pruning of greenhouse grapes can promote early germination of grapes for 3-5 days, and increase the germination rate by about 30%. Processing time: end of December to early January of the following year. Choose sunny at noon as the best (between 10 am and 3 pm).
Canopy
The period of covering the shed is appropriately performed according to the characteristics of different cultivars. Varieties with short cooling requirements such as Venus Seedless, Early Jade, and Purple Jade (requires 700 ~ 1000 hours of cooling) can be covered in early January. Varieties such as Fujiminori, Xiahei, and Jingya (requires 1,100 to 1,300 hours of cold) can be covered in the middle and late January, and should be completed by the end of January at the latest.
Fertilizer and water management
After the vines were covered, the grapes were irrigated with water in a timely manner, and the whole shed was closed. One week before the germination (end of January to early February), 15 kg of urea or 30 kg of ammonium carbonate and 3 kg of boron fertilizer were applied to the acres, and then watered again. At the same time, 0.5% urea solution plus 100 mg / L gibberellin was used to spray the grape shoots once to promote germination and increase the germination rate.
Temperature and humidity management
①After covering the shed to before budding. The whole shed is closed, relatively maintaining the high temperature and high humidity in the shed, and the maximum temperature is controlled below 35 ° C. If the temperature is higher than the critical temperature, the air will be properly ventilated and cooled; when the humidity is lower than 90%, water will be sprayed on the grape branches to increase the relative humidity.
② After budding to pompom. The maximum temperature should be controlled below 30 ℃, and the minimum temperature should be controlled above 5 ℃. Below the minimum critical temperature, insulation measures should be taken (such as double film covering), and the relative humidity should be controlled below 60%. If the humidity is too high, protective film can be covered in the garden to cover the mulch, which can reduce the humidity and increase the ground temperature, and adjust the up and down growth balance.
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Our company offers variety of products which can meet your multifarious demands.including API Powder.Pharmaceutical Intermediates.Vitamins Powder.Plant Extracts.Food Additive.Peptide Powder and so on We adhere to the management principles of "quality first, customer first and credit-based" since the establishment of the company and always do our best to satisfy potential needs of our customers. Our company is sincerely willing to cooperate with enterprises from all over the world in order to realize a win-win situation since the trend of economic globalization has developed with anirresistible force.
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