Measures to promote the coloring of citrus fruits

April 24 12:07:33, 2024

Reasonable fertilization will enter the fruit color conversion period and flower bud differentiation period in November, rationally control the use of nitrogen fertilizer and increase the application of phosphorus and potassium fertilizers. For fruit trees with poor roots and weak tree vigor, we must start from the root. During the fruit color change period, the ground can be flushed with 0.5% potassium dihydrogen phosphate or potassium nitrate + water-soluble quick-acting organic matter (amino acid, humic acid, seaweed) Acid and other substances rich in organic carbon and medium and trace elements). Not only can it promote the development of capillary roots, but it also directly supplements the phosphorus, potassium and medium- and micro-fertilizers required for fruit expansion and color change, so that the tree is strong, the fruit is expanded and the coloring is in place in one step.
When the foliar spraying on the fruit surface begins to turn yellow, spray foliar fertilizers with trace elements such as potassium dihydrogen phosphate + calcium and magnesium + amino acids or alginic acid (better containing boron and molybdenum) to supplement quick-acting coloring nutrients. It is beneficial to the formation of carotenoids, flavonoids, lycopene and anthocyanins in the fruit, and promotes the color change of the fruit.
Choosing the right coloring agent According to the pigmentation of each citrus species, choose the coloring agent at an appropriate time. Anthocyanins should be used for blood oranges, and amine compounds should be used for red meat pomelo, orange, and citrus.
Use hormones with caution. Normally mature citrus varieties should not be used with gibberellins, cytokinins, etc., and hormones such as ethylene and naphthalene acetic acid should be used cautiously to promote coloring. According to the tree's vigor, use regulators such as brassinolide and diethyl amino fresh fat. .
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