Calcium is one of the essential elements for apple growth and development. When the apple tree is deficient in calcium, its root growth is obviously inhibited, and the growth point often rots. The fruit is prone to bitter pox and spot disease during the ripening and storage period.
Apple calcium technology essentials
According to relevant research, the content of calcium in apple fruit is negatively correlated with respiration: that is, the apple with low calcium content has strong respiration, the fruit is aging fast, and it is prone to diseases such as cork disease and bitter pox, and is not resistant to storage; After spraying calcium solution, apple can effectively promote fruit coloration and fruit wax formation, improve fruit quality, prolong fruit storage life, reduce pre-harvest fruit cracking, and reduce disease occurrence.
The period of calcium supplementation: the calcium supplementation of the fruit can be carried out from the young fruit stage after the flowering to the fruit harvesting, and even after the harvest, the calcium can be obtained by the fruit dripping.
Calcium supplement products: When choosing, be sure to consider cost performance as an important factor. (1) First, a fully processed calcium supplement preparation is selected. Raw material products, such as calcium chloride, calcium nitrate, calcium acetate, etc., although high in calcium, but because there is no technical content, often the absorption rate is particularly low, even in the young fruit period will also cause damage to young fruit, so that the fruit Lose commerciality at the beginning of development. (2) Select a product with a content of 10% or more. For example, Huaxia Baodao Calcium (18% calcium, 28% total nutrients), remember not to choose calcium supplements such as calcium and calcium containing only about 4%.
Use of calcium supplement products: (1) Use under neutral and weakly acidic conditions. Calcium supplements tend to be neutral or weakly acidic, and calcium ions or complexed calcium ions are only stable under these conditions and will precipitate under alkaline conditions. (2) Mixed with other foliar fertilizers. Calcium supplements, whether in ionic or complex state, are generally not compatible with most foliar fertilizers, as most foliar fertilizers contain substances such as sulfates and phosphates that precipitate calcium ions. These deposits often cause damage to the apple fruit (fertilizer). Except for individual fertilizers, such as urea and nitrate. (3) Mixed with pesticides. Calcium supplements can be mixed with most acidic and neutral pesticides (except pesticides containing sulfate and phosphate); they cannot be mixed with alkaline pesticides. (4) Mixed with plant growth regulators. It is generally not recommended to use hormonal plant growth regulators that promote cell division in fruit trees, and to promote the use of plant growth regulators that do not produce cell division, promote cytoplasmic circulation speed and plant photosynthetic efficiency, such as The mixed use of the preparation can promote the absorption of calcium and the transfer to the fruit, thereby improving the utilization and effectiveness of calcium.
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