Scientific calcium supplement apple tastes beautiful
Calcium is an indispensable element in apple. Due to its special role in fruit cells, deficiency often leads to the physiological problems of apple fruit. The most typical is the bitter pit, pox spot, and water heart disease. The hardness of the fruit is Storage and shelf life are also closely related to the calcium content of the fruit.
Misunderstanding 1: Only foliar spray
Calcium spray on the leaves can prevent fruit bitter pit disease, pox spot disease, water heart disease and other physiological diseases. The actual situation is that the roots of fruit trees absorb calcium from the soil is the main way to provide calcium for the tree and fruits, and calcium spraying on the leaves is only a minor supplement. Because the soil organic matter content is low (mostly less than 1%), the pH is mostly around 8 and it is weakly alkaline. Therefore, the absorption and utilization of the chemical calcium fertilizer used by the root system, such as superphosphate, is very low. The fruit grower should increase organic fertilizer. Orchard grass, grass cover, straw and other measures to increase soil organic matter content, or adjust the soil pH, increase soil exchangeable calcium ion content, in order to achieve a stronger calcium absorption effect of the root system.
Misunderstanding 2: The effect of calcium supplementation in young fruit is the best, and there is no effect after calcium supplementation.
The actual situation is that in the whole process of fruit tree growth, the calcium spray will play a role in calcium supplementation, and the effect of calcium supplementation is more obvious in the later period. In the young fruit period, because the peel is thin and the fruit is small, the capacity of absorbing calcium is relatively strong in terms of unit area and unit weight, but for a fruit, since the fruit is small, the contacted liquid is less, and the supply is less. The absolute amount of calcium in the fruit is very small; with the growth of the fruit, the surface area of ​​the fruit increases, and the absolute amount of calcium absorbed by the fruit after calcium spraying also increases. Therefore, the effect of calcium supplementation after bagging fruit is best.
Myth 3: Amino acid calcium supplementation is the best
Amino acid is a nitrogen-containing organic compound that can increase the photosynthesis of leaves and can play a role in rapidly supplementing nitrogen fertilizers. Amino acids and calcium loosely combine to form calcium amino acids. As the leaves are sprayed, the tree absorbs amino acids. Absorption of calcium, calcium absorption and utilization rate is higher than calcium chloride and calcium nitrate, but the calcium carbonate calcium amino acid preparation is generally about 4% of calcium, after diluted (500-1000 times, even higher multiples), the spray solution The calcium concentration is very low and calcium supplementation is not optimal.
Misunderstanding 4: The higher the calcium content, the better the calcium effect
The effect of calcium supplementation is indeed related to the calcium content of the foliar fertilizer, but in fact the raw material calcium chloride and calcium nitrate have the characteristics of high calcium content (up to 35% or more), and the effect of calcium supplementation is not good. In the presence of calcium and low calcium activity, tree and fruit absorption efficiency is low.
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