What are the dangers of calcium deficiency in grapes?
Today's share: the small knowledge of calcium deficiency in grapes, the following site editor introduces to netizens.
What are the dangers of calcium deficiency in grapes?
Greenhouse grapes have entered the young fruit development stage, and the demand for calcium is very high. If calcium (G-Y) is not in place, it will directly affect the quality and yield of grapes. Therefore, the top priority in grape garden management is to supplement calcium.
The dangers of calcium deficiency in grapes
If grapes are deficient in calcium, it can cause necrosis of young tissues, fruit softening, thinning of cell walls, poor plant resistance, and many physiological diseases, such as sunburn, fruit cracking, grain shedding, sour rot, water bottle disease, poor quality, and low commercial rate.
When is the best time to supply calcium to grapes?
1. From germination to leaf development, grape plants require a large amount of calcium, accounting for about 40% of the annual calcium requirement. If calcium is sufficient during this period, it will greatly affect the overall germination of grapes, the health of new shoots, the development of flowering period, and early flowering.
2. From fruit setting to hard core stage, grapes absorb 30% of the annual calcium content. Adequate calcium can ensure the good development of grape skin, thickening of fruit cell walls, firm and crisp flesh, prevent fruit cracking, enhance resistance, and keep the tree strong and everlasting.
3. The calcium absorption from the hard core stage to the coloring stage accounts for about 20% of the annual amount. When calcium is sufficient, the grape axis can thicken without shedding, the flesh is crisp, the skin thickens, reducing the occurrence of fruit cracking, fundamentally solving the diseases caused by fruit cracking.
Methods for supplementing calcium in grapes
1. Foliar spraying. In areas or plots prone to calcium deficiency, spray 0.3% silicon-magnesium-calcium fertilizer before and after flowering, every 7-10 days, mainly on the back of leaves.
2. Root application. First, adjust the pH of the soil, the most suitable pH for grapes is between 6.0-7.5, increase the application of organic fertilizer and biological bacteria fertilizer, improve the soil organic matter content, enhance the activity of existing calcium in the soil, and reduce the opportunity for new soil calcium fixation, which can effectively prevent the occurrence and spread of physiological diseases.
3. In autumn, calcium fertilizer can be applied in combination with autumn fertilization, adjust soil pH, and supplement trace elements such as silicon, calcium, magnesium, copper, iron, and zinc. Or dilute silicon, magnesium, and calcium by 30 times and apply dryly, which also works well.
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