Citrus flowers and fruits, brassin or gibberellic acid?


Release time:

2022-04-24

Protecting flowers and fruits is an important part of citrus planting, which largely determines this year's yield. Brassin and gibberellic acid (920) are two commonly used regulators for citrus flowers and fruits, and some growers trust brassin more , and some are used to gibberellic acid.
So which kind of flower and fruit protection is good? What are the characteristics of the two? Can we use it together? Let's talk about this topic today.
Brassin is known as the sixth largest plant endogenous hormone in the world, which can fully stimulate the internal potential of plants, comprehensively regulate and promote the growth of plants, and give full play to the advantages of growth. The principle of fruit preservation is to coordinate the balance of endogenous hormones in the tree, strengthen the transformation and absorption of nutrients by the plant, so as to meet the nutrient demand of fruit development and reduce flower and fruit drop.
Application of brassin in citrus flower and fruit preservation:
1. In the bud stage, natural brassin + phosphorus, boron, zinc foliar fertilizer can improve pollen vigor and fruit setting rate, and ensure the number of young fruits in the early stage.
2. When encountering the influence of natural factors that are not conducive to fruit setting, such as drought, waterlogging, cold spring, etc., spraying natural brassin + amino acid foliar fertilizer can improve the plant's resistance to stress and reduce the damage caused by unfavorable factors. achieve fruit.
3. For citrus varieties with less severe fruit drop (such as in spring), natural brassin + phosphorus and potassium foliar fertilizers are generally used to protect the fruit during the physiological fruit drop period. If gibberellic acid is used to protect the fruit, it will cause the peel to become thicker and affect the quality.

 

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  4. When the flowers are too many and too weak, spray natural brassin + phosphorus and boron fertilizers on the leaves after 2/3 of the flowers to improve the quality of the flowers.
Gibberellic acid is a plant hormone that promotes growth. The high content of abscisic acid during fruit setting will induce abscission and cause fruit drop. The principle of gibberellic acid for fruit preservation is to inhibit the formation of abscisic acid, and at the same time improve the regulation of nutrients in young fruits. ability to reduce fruit drop.
The application of gibberellic acid in citrus flower and fruit preservation:
Mainly used for fruit preservation of easy-to-fall fruit varieties, such as Shiranui, navel orange, sugar orange, Wenzhou mandarin, seedless fertile mandarin, etc.
1. After 2/3 of the flowers are withered, use gibberellic acid + brassin + phosphorus, boron foliar fertilizer to preserve fruit.
2. After 15 days of blooming, gibberellic acid + brassin + high potassium foliar fertilizer will stabilize the fruit.
Gibberellin application note:
☆When the spring shoots are not mature, the young leaves will be enlarged, which will aggravate the contradiction between the shoots and the fruit, and cause more fruit drop.
☆The use of gibberellic acid too many times or the concentration is too high can easily lead to leaf curling, leaf thinning and turning green slowly, peel thickening and thickening, no slag, quality decline, and more germination of summer shoots.
  Summarize
1. Brassin can balance tree hormones, promote nutrient absorption and transform to preserve flowers and fruits. It has multiple functions such as strong flowers, fruit preservation, and fruit protection in adversity. Brassin is recommended for varieties with weak flowers and less severe fruit drop.
2. Gibberellin can protect fruit by inhibiting the stalk falling off. It is mainly used to protect the fruit of easy-to-fall fruit varieties, but pay attention to the frequency and concentration of use. There is a benefit of the concentration of the regulator, and the concentration of different tree species and different regions is different.
3. The two can be used together. Brassin can reduce the risk of thick peel and quality degradation caused by gibberellic acid alone.