Pictures and prevention methods of calcium deficiency symptoms in grape

What is the symptom of calcium deficiency in grapes? What causes calcium deficiency in grapes? What method can prevent grape calcium deficiency? Netizens with experience in grape cultivation are also asked to introduce grapes as perennial lianas, which are generally cultivated in greenhouses or equipment scaffolding, resulting in the vineyard soil being unable to plough for a long time, resulting in the deposition or loss of elements in the soil. resulting in symptoms of element deficiency. Today, the farming network has sorted out the harm, causes and prevention methods of grape calcium deficiency, which are listed in detail below for netizens' reference. Symptoms and hazards of grape calcium deficiency: when grape calcium deficiency, grape leaf color fades, young leaf veins and leaf margin turn green, and then there are needle-sized brown spots near the leaf margin; with the growth of grape, the leaf margin is scorched, the leaf curls downward, the top growth point of grape shoot dies, the grape flower shrinks, the fruit accumulates less sugar, the taste is light, the fruit powder is less, and it is not tolerant to storage. At the same time, the new grape root is short, thick and curved, and the grape root tip is easy to turn brown and die. The reason for calcium deficiency in grapes: because calcium is one of the important basic elements in plants and plays an important role in a series of physiological changes. However, there are often too many ions such as potassium, ammonium, sodium and magnesium in the soil, which hinder the external absorption of grapes and easily lead to calcium deficiency; at the same time, low air temperature, rapid water evaporation, soil drought and high concentration of soil solution are not conducive to the absorption of calcium by grapes. resulting in calcium deficiency. Prevention and treatment of calcium deficiency in grapes: 1. Appropriate irrigation should be carried out on grapes to ensure adequate water supply. 2. lime 75kg 100kg or plant ash 200kg / mu can be applied per mu of vineyard. Calcium magnesium phosphate fertilizer can also be applied to grapes, because calcium magnesium phosphate fertilizer contains 20%-30% calcium oxide, 16% magnesium oxide, 14%-18% phosphorus pentoxide and 40% silicon dioxide. Click to see "the role of Lime nitrogen" < the role of Plant Ash > 3. When grapes show calcium deficiency, foliar spraying can be used to supplement calcium elements in grapes. Calcium fertilizers that can be used for foliar spraying on grapes are: calcium carbonate, calcium chloride, calcium hydroxide, calcium silicate, etc., or 2% superphosphate leaching solution or 0.3% calcium chloride aqueous solution. Note: vineyards should avoid one-time application of large amounts of potassium and nitrogen fertilizer, and should not overuse calcium fertilizer. The best fertilization method is balanced or soil testing formula fertilization. Prevention and treatment of magnesium deficiency in grapes the method of making grapes bear fruit several times a year