Children's calcium deficiency is not high, and vegetables are the same. If the vegetables are deficient in calcium, it is easy to cause various vegetable diseases, affecting the quality and yield of vegetables. So what are the symptoms of calcium deficiency in vegetables and what is the cause of calcium deficiency in vegetables? The following is to let Xiaolin of Huinong.com answer your questions one by one, and tell you how to do calcium deficiency in vegetables!

First, the performance of vegetables lacking calcium

1. Necrosis occurs at the growth point, and the leaves appear to curl and turn yellow.

Note: Calcium deficiency is often found in the new tissue of plants; the lack of different vegetable types is different.

2, tomatoes, peppers lack of calcium, causing umbilical rot.

Note: It is easy to occur when there is a fruit like a thumb, and the fruit that is knotted during the expansion period is rare.

3, cabbage deficiency calcium, causing heartburn.

Note: Both the growth period and the storage period can occur, mostly in the rosette period and the core period.

4, melons lack of calcium, causing rotten faucets, umbilical rot.

5, celery lack of calcium, causing heartburn.

6, radish lack of calcium, causing heart disease.

Second, what is the role of calcium?

1. Participate in the differentiation process of the root tip and shoot tip growth point. If calcium deficiency occurs, it is more common at the growth point and the damage is heavier.

2, can enhance the crop's ability to resist stress, prevent premature aging of crops, and also improve the quality of crops. Calcium deficiency in the middle and late growth stages will accelerate the production of ethylene, promote the aging of crops, and seriously affect the yield and storage and transportation.

3. It has an indirect important role in maintaining fruit firmness and enhancing the storage stability of the fruit. Calcium deficiency will reduce the hardness of the plant cell wall and provide convenience for the invasion of fungal diseases, which will lead to fruit cracking.

4. It helps to reduce nitrate in plants, neutralize organic acids, and detoxify organic acids produced during plant metabolism.

5. It will also affect the hardness and standing of the crop stalk and the formation of the grain.

Third, what causes calcium deficiency?

1, the vegetable field has not been supplemented with calcium by applying base fertilizer for a long time, resulting in low calcium content in the soil, causing calcium deficiency.

2. The use of chemical fertilizers in some vegetable fields is increased, and organic fertilizers are rarely used, which will cause soil acidification and salinization, thus affecting the absorption and utilization of calcium by roots.

3. In the high temperature and drought environment, if the water is not watered in time, the concentration of the salt solution in the soil will increase, which will inhibit the absorption and conduction of calcium by the root system and cause calcium deficiency.

4, some vegetable farmers excessive application of nitrogen, potassium fertilizer, or fertilizer containing more soluble potassium, sodium, magnesium, etc., will reduce the ability of roots to absorb calcium.

Fourth, how to prevent calcium deficiency? Vegetable calcium deficiency remedy?

It is generally found that after calcium deficiency, it is not much use, so be sure to remember the two best times to supplement calcium fertilizer!

1. During seedling colonization

The best period for root development and expansion is generally after the seedlings are planted. At this time, it is necessary to pay attention to the supplement of calcium fertilizer, because it can promote the development of roots, the differentiation of flower buds, and improve the robustness of plants.

2. At the beginning of the flowering result

At the peak of flowering, the demand for nutrients in crops is very urgent. If calcium is deficient, it will be a little more difficult. Therefore, it is necessary to pay attention to the beginning of the flowering results to start the calcium fertilizer, mainly for the application of the same amount, the same amount used in the seedling period; to the fruiting period, but also pay attention to the spray on the leaf surface to supplement the calcium fertilizer.

Precautions for foliar spray calcium fertilizer: First, firstly mix the calcium fertilizer solution, plus the second dilution of the pesticide; second, the general calcium fertilizer can not be used together with the phosphorus-containing foliar fertilizer, but there are also special cases.

5. What should I do with calcium deficiency in vegetables?

1. Choose a reasonable calcium fertilizer

Different calcium fertilizers will have different properties. Such as superphosphate, calcium magnesium phosphate fertilizer, heavy superphosphate phosphate is an important source of calcium fertilizer; bone powder, grass ash also contains a certain amount of calcium, can be analyzed according to the specific circumstances.

For vegetables in greenhouses, the pH of the soil is generally between 6.5 and 7.5. Neutral fertilizers or alkaline substances, such as slaked lime and calcium nitrate, should be used. Also, use less acidic or physiologically acidic substances.

2. Use fertilizer in the best supplement period of calcium fertilizer

Before the planting, the base fertilizer should be applied with calcium fertilizer. For greenhouses that have been continuously planted for many years, it is generally possible to use 2000-3000 kg of decomposed organic fertilizer per acre, plus 30-45 kg of superphosphate.

When topdressing, you can use calcium slaked 40-60 kg per acre to supplement calcium nutrition, but if it is sandy soil, the amount of slaked lime should be reduced appropriately.

For foliar spray application, 0.1%-0.2% calcium nitrate and 1% superphosphate can be sprayed once every 15 days, and sprayed continuously for 3 to 4 times. Or use a better sugar alcohol to chelate calcium products.

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