Key points of flower and fruit management in mango orchard
(1) use of plant growth regulators: plant growth regulators must be used in accordance with the prescribed concentration, method and time of use, and plant growth regulators registered and produced without the approval of the State shall not be used. As a plant growth regulator for controlling shoots and promoting flowers, the recommended concentration is ethephon 200mg / L and 300mg / L. 15% paclobutrazol per square meter canopy soil application 6 8 grams, foliar spraying 800 million 1000 mg / L. As a plant growth regulator for flower and fruit protection, the recommended concentration is gibberellin 50 mg / L and naphthylacetic acid 40 mg / L. Neutral detergent and surfactant should be added to improve the efficacy of foliar spraying of plant growth regulators. The use of plant growth regulators should be stopped one month before harvest. (2) pruning and thinning flowers and fruits: for trees with a flowering rate of more than 80% of the last shoots, 70% of the terminal inflorescences are retained, the rest of the inflorescences are removed from the base, and the lateral flower branches of the base 1, 3, 1 and 2 are cut off for the larger inflorescences. From the flowering stage to the fruit development stage, cut off the flower branches that do not hang fruit and the branches and leaves that hinder the fruit growth, and cut off the spring and summer shoots extracted in the young fruit stage. Within 15-30 days after flowering, 2-4 fruits were retained in each inflorescence, the deformed fruit, disease and insect fruit and over-dense fruit were removed, and the number of empty bags after bagging was reduced.
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High yield technique of early Fruit in three years after planting navel Orange
There are two kinds of fertilization for navel orange: soil fertilization and extra-root topdressing, mainly soil fertilizer. (1) soil fertilization: soil fertilization should not only benefit the root system to absorb fertilizer as soon as possible, but also prevent the root system from fertilizer damage. Therefore, fertilization should be made according to time, tree and fertilizer. Adhere to shallow root application, root deep application, spring and summer shallow application, autumn and winter.
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The method of soil testing and formula fertilization for mango
Mango flowering and fruit setting period is a very important period in mango production and management. the management measures of mango flowering and fruit setting period are as follows: 1. Arrangement of flowering branches and shoots. Remove overdense branches, shade weak branches and disease and insect branches about 2 months before flower bud differentiation, leaving only 1 or 2 shoots per branch, which can increase the crown.
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