Key Management Points for Sapphire Grapes at Each Growth Stage

Sapphire is a new grape variety whose quality and appearance are both different from ordinary grapes. Because of people's curiosity, it became very popular as soon as it hit the market. As a result, more and more people are growing Sapphire grapes, and its planting area is naturally growing larger and larger. When growing Sapphire grapes, management methods are very important, and each stage has different management key points. Below, the editor will give you a brief introduction.

1. Bleeding stage

Each spring, when the soil temperature rises to about 7-8°C, the grape roots gradually regain vitality and begin to absorb nutrients. The nutrients are then transported to the aboveground parts of the plant, promoting the grape to sprout and grow. However, because the vessels in the stems and vines of Sapphire grapes are thick and relatively loose, when sap activity is strong, if the plant has a wound, the sap will flow out from the wound. This is the bleeding stage of Sapphire grapes. Therefore, during the bleeding stage, we must strengthen management, not allow the tree to develop wounds, try not to do pruning work, and do a good job of loosening the soil and weeding to prevent bleeding.

2. New shoot growth stage

The new shoot growth stage generally lasts from when the buds of the grapevine grow until the early flowering stage, with a total time of about 35 days. When the average daily temperature stays above 10°C, the buds of the Sapphire grapevine begin to sprout. After about half a month, the growth rate of the new shoots speeds up, and they enter the full flowering stage. Because at this time the organs of Sapphire grapes are in a vigorous period, which is key to the yield of that year, we must do a good job of fertilizing and control the nutrient ratio of nitrogen, phosphorus, potassium, and so on. To prevent excessive nutrient consumption, we must also do a good job of bud fixing, bud removal, and other work, and reasonably adjust the load of the grapevine.

3. Flowering stage

The flowering stage of Sapphire grapes is relatively short; from the first flower to the end of flowering, the longest period is only about half a month. When the temperature rises to about 25°C, it is the most suitable temperature for Sapphire grapes to flower. If the temperature is below 15°C, then the flowering fertilization rate will be reduced. Therefore, during the flowering stage, we should appropriately apply fertilizers such as fulvic acid to increase the fertilization and fruit-setting rate. And during the flowering stage, we must also do a good job of vine tying, shoot removal, and other work. Improve field aeration and light penetration, promote flowering, and for some flower clusters with poor pollination, carry out artificial pollination.

4. Berry growth stage

When the grape ovary begins to expand, it enters the berry growth stage of Sapphire grapes. This period lasts until the berries change color and soften. During this period, Sapphire grapes have a relatively large demand for nutrients, so we must increase the nutrient ratio. Not only should we increase basic nutrients such as nitrogen, phosphorus, and potassium, but we should also timely supplement various trace elements such as calcium and boron. We should also appropriately spray foliar fertilizer to enhance leaf photosynthesis, increase nutrient accumulation, promote fruit expansion, and improve berry quality.

The above is a brief introduction to the management key points of Sapphire grapes at each stage. The management work for Sapphire grapes is very important, and the quality of management directly affects the yield, so everyone must pay close attention! That is all for today's introduction. This article is for reference only, and we hope it can help everyone!