Calcium is one of the essential nutrient elements for the growth and development of crops. According to investigations and studies, many orchards have only paid attention to the input of chemical fertilizers (nitrogen, phosphorus, and potassium) in the production of fruit trees and ignored the application of other trace elements such as calcium. In addition, the roots of fruit trees have poor ability to absorb calcium. Due to the different raw materials, the leaves have poor penetration and slow absorption after spraying, resulting in poor mobility of calcium in the tree body and other characteristics, making the calcium deficiency of fruit trees more and more prominent.
Calcium deficiency in crops can cause a variety of physiological diseases and physiological obstacles, affecting the growth and development of crops, flowering and fruit setting, resulting in poor fruit quality. Therefore, calcium supplementation in fruit trees must be paid attention to.
There are three peak periods of calcium absorption by fruit trees each year. The first time is about 20-30 days after flowering, during which about 30% of calcium can be accumulated. It is recommended that calcium and boron be supplemented at the same time; the second time is during the fruit expansion period. During this period, about 50% of the total calcium can be absorbed; the third time is about 20-30 days before the fruit picking. The calcium absorbed during this period can be used for the calcium needs of the fruit tree growth next spring.
While adding organic fertilizer to the orchard, fertilizing the soil, and promoting the absorption and utilization of calcium by fruit trees, it is recommended to supplement calcium outside the roots during the three peak periods of calcium absorption to increase the concentration and application quality of calcium.
To choose high-quality calcium fertilizer, two characteristics must be grasped: one is that the calcium ion concentration should be high, which requires more than 10%; the other is that the calcium activity and absorption rate should be high, which requires more than 80%. In general, calcium chloride and calcium nitrate have the characteristics of high calcium content, but low absorption efficiency; amino acid calcium has the characteristics of high absorption efficiency, but the calcium ion content is low, about 5%.
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Greenhouse Drip Irrigation System
Fertigation is using your irrigator to fertilise the plants and soils as you water, which is the most efficient and advanced practice of fertilization. Aid of pressure system (or natural divide terrain), the soluble solid or liquid fertilizer, according to the soil nutrient content and crop fertilizer regularity and characteristics of species, with the fat of with irrigation water, through a controlled water supply pipeline system, supplying, the compatibility, water through the pipe and drop head form drip irrigation, uniform, regular, quantitative, infiltration area crop root growth and development, make the main root soil always stay loose and appropriate moisture content, at the same time according to different crop fertilizer characteristics, environment and soil nutrient content in soil; Crops in different growth phase water requirement, the different development stages of the fertilizer rule is the demand of design, the water and nutrient timing quantitative, provided directly in proportion to the crops.
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