Symptoms of calcium deficiency and calcium supplementation in Tomato

Tomato growth, in addition to the necessary fertilizer, can not lack growth elements, lack of elements will lead to element deficiency, the emergence of different adverse symptoms, such as calcium deficiency, will affect the growth and development of fruit. Specific performance of calcium deficiency, growth, and how to improve, how to supplement calcium, regulation. We will continue to introduce it below.

1. Symptoms of calcium deficiency

After calcium deficiency, the whole plant is relatively short, the branches are small, and the leaves are drooping. At the beginning, there will be a yellow edge of the top leaf, the phenomenon of shrinkage, in serious cases, completely withered. Rhubarb brown spots appeared in the middle leaves gradually, and necrotic after the disease site. During the period of fruit growth, calcium deficiency will cause fruit cracking and abnormal coloring. There are brown fruit and green back fruit. These symptoms caused by calcium deficiency are also called umbilical rot.

2. The cause

May be the use of too much nitrogen fertilizer, potassium fertilizer, affect the absorption of calcium, or soil drought affects the absorption, the concentration of soil solution is too high, calcium absorption and utilization. Rapid water transpiration and low environmental humidity lead to insufficient water and poor absorption of calcium. Or the soil itself is deficient in calcium, such as acidic soil. Plants naturally cannot absorb it. But some are not without, but are fixed.

3. Methods of calcium supplement

The time of calcium supplement is when the fruit expands and is close to ripening. Using 0.3% calcium nitrate solution, 0.2% calcium chloride solution, 600 times fluid calcium solution, 700 times chelating calcium solution, 500 times amino acid calcium solution, there are many corresponding vegetable calcium supplements, which can be selected for use. It is usually sprayed once a week. Spraying for a few weeks will work. Some abnormal fruits can also be improved.

4. Apply more calcium fertilizer

After the use of calcium superphosphate fertilizer, the content of calcium in soil increased, and when used with biological fertilizer, the active components of calcium increased. Calcium superphosphate generally uses one or two hundred jin per mu, which can be used as base fertilizer or topdressing in the flowering and fruit stage. The planting of acid soil can be improved by adding lime and gypsum. Use more than 100 jin of lime per mu. Not only improve acidity, but also increase calcium content.

Calcium deficiency in tomato is not a common phenomenon, but calcium deficiency in soil will occur. Mainly rely on fertilization to supplement calcium, mainly apply special water-soluble calcium fertilizer, these effects are faster than fertilization, but fertilization plays a long-term role.