Calcium is one of the essential elements of crops and has extremely important physiological functions, and the calcium demand of most crops is second only to nitrogen, phosphorus and potassium. Many growers will encounter the problem of crop calcium deficiency, such as pepper umbilical rot, dried cabbage heartburn, grape black pox, apple heart disease, citrus cracked fruit, etc., which seriously affect the income of growers. Therefore, the application of calcium fertilizer is essential.
1. Causes of calcium deficiency in crops.
1. Soil factors: long-term planting of crops, but not calcium supplementation, so that the soil calcium content is low, and crops cannot absorb calcium. Soil salinity is too high, which affects the absorption of calcium by crops. The soil environment is poor, the water and fertilizer retention capacity is weak, and the calcium fertilizer is lost.
2. Nutrient imbalance: a large amount of chemical fertilizer is applied, so that the soil nitrogen, phosphorus and potassium content is too high, the nutrient element is unbalanced, and the calcium is fixed, which reduces the effective calcium content and makes it difficult for calcium to be absorbed and utilized by crops.
3. Root factors: crop root development is stunted and absorption capacity is reduced.
2. Factors affecting the absorption of calcium fertilizer.
The mode of transport of calcium in crops is transpiration, and changes in the external environment will affect the intensity of transpiration at any time and reduce the absorption rate of calcium. Calcium is poorly mobile in crops, and common calcium deficiencies are nascent parts and fruits.
3. How to supplement calcium fertilizer.
Calcium deficiency can cause various physiological problems in crops, reducing yield and quality, therefore, in the process of crop planting, it is recommended to use calcium fertilizer. There are two main ways to supplement calcium in crops, root fertilization and foliar spraying.
It is recommended to use calcium and magnesium granular fertilizer as the base fertilizer for soil calcium supplementation to improve the activity of calcium and solve the problem that conventional calcium fertilizer is not easy to absorb in the soil. Calcium and magnesium granular fertilizer contains a variety of medium and trace elements, rich in nutrition, breaking the antagonism of elements, complementing and increasing efficiency.
Foliar calcium supplementation is recommended to use calcium fertilizer, which has a high absorption rate and can effectively prevent physiological diseases caused by calcium deficiency. However, foliar calcium fertilizer supplementation should be mastered at a reasonable fertilization time. The fruit setting stage of fruit trees is the critical period for calcium supplementation of crops, and it can be sprayed continuously 3-4 times from the fruit setting stage, and the calcium solution can be sprayed on the fruit and the back of the leaves as much as possible.
All materials in this article are the original feedback from the manufacturer's customers, and are not authorized.