What are the symptoms of calcium deficiency in grapes?

Grapes are planted all over our country, and fertilization is very important when planting grapes. In addition to basic fertilizers such as nitrogen, phosphorus and potassium, nutrients such as calcium should also be replenished in time. Calcium plays a great role in the growth of grapes, if the grape growth lack of calcium, then it is easy to appear calcium deficiency. So what are the symptoms of calcium deficiency in grapes? The following editor will give you a brief introduction, let's have a look!

1. Symptom manifestation

Grapes in the growth, if the lack of calcium, then the leaves will appear reverse curling phenomenon. There are many spots on the young leaves, which gradually fade to dark brown, and then become withered spots. If calcium deficiency is serious, then the growth point of grape shoots will gradually necrosis, resulting in a large number of grape fruit cracking, fruit shrinkage and other diseases, reducing fruit firmness and storability. At the same time, calcium is also an important component of the cell wall, calcium deficiency will lead to thin peel of grape fruit, then it is easy to produce sunfruit in high temperature and strong light environment, and it is easy to crack fruit after ripe rainy season, which reduces the yield and quality of grape.

2. Causes of calcium deficiency

The lack of calcium in soil is one of the main reasons for calcium deficiency in grapes. Because the calcium content of the soil itself is not very high, especially some igneous rocks, siliceous sandstone or exchangeable sodium high saline-alkali soil and so on. However, in general, grapes will not be planted in this kind of soil, mainly because the soil is acidified seriously, resulting in insufficient content of organic matter in the soil, thus reducing the content of calcium elements such as exchangeable calcium and solution calcium in the soil. lead to calcium deficiency in grapes.

Then there is the cause of soil salinization, if the soil salinization, although the exchange of calcium in the soil is more abundant. However, it is generally difficult to enter the soil solution and move to the grape root, and if long-term drought and evaporation, it will inhibit the absorption of calcium, resulting in calcium deficiency in grapes. Finally, if the grape root injury or fertilization, excessive application of phosphorus and potassium fertilizer and other fertilizers will affect the calcium absorption of grapes, resulting in calcium deficiency in grapes.

3. Solution

We should mainly give priority to prevention. First of all, when we apply fertilizer, we should pay attention to the proportion of calcium and supplement calcium for the soil. Then properly improve the structure of the soil and reasonably increase the application amount of organic fertilizer. And control the amount of nitrogen, phosphorus, potassium and other elements to maintain a good proportion. Then in the grape foliar expansion period, we can spray foliar fertilizer to supplement calcium for the grape to ensure the normal growth of the grape.

The above is a brief introduction to the symptoms of calcium deficiency in grapes. That's all for today's introduction. This article is for reference only. I hope it can help you all.