Fruit is often eaten in everyone's life, and edible fruits can supplement some trace elements that the body lacks. In the growth process of fruit trees, the use of growth regulators can help fruit trees grow faster and better. This article will introduce how to use growth regulators scientifically.
1. Cutting roots . Mainly used for grape, kiwi, apple dwarf anvil. The Chuanchuan agent is acetobutyric acid (IBA), naphthaleneacetic acid (NAA) and sodium naphthalene acetate in the auxin. Instructions:
1 high concentration rapid dipping method. The base of the insert is quickly soaked in a high concentration solution (500-1000 μl/L) for about 5 seconds and then immediately inserted into the bed.
2 low concentration soaking method. Generally, the concentration is 50-200 μl/L, the soaking time is 8-24 hours, the concentration is high, and the soaking time is short.
3 Dip powder method. The growth regulator is first dissolved in alcohol, and then the talcum powder or clay is soaked in an alcohol containing 1000-5000 μl/L of the active ingredient of the growth regulator, and the alcohol is evaporated to obtain a powder. Before inserting the powder into the powder, first soak the base with water, then shake off the excess powder.
2. Inhibit the growth of new shoots and promote the formation of flower buds. Mainly paclobutrazol.
1 use range. Mainly used in pome fruits, stone fruits, citrus, the effect is obvious, can increase the flower buds of apple saplings, the flowering nodes of peach trees are reduced, the number of flower buds is increased, but it is not obvious on the grapes.
2 use method. The crown is sprayed and the soil is applied. The soil application has a long-lasting effect period of up to 2-3 years, with less dosage and convenient operation. It can also be applied with a trunk. This method can only be applied to 2-3 year old saplings by dissolving the agent in a non-toxic organic solvent or a high concentration solution (1000 μl/L) and then applying it to the main branches and trunks that have not yet aged. Dosage 0.1-0.25 grams.
3 Note: Only Wangshu can be used, too weak trees, 1-2 years old saplings can not be used; up to 2 years in a row, if you still need to use it should be stopped after 1-2 years to resume use; the dosage can be small Do not overdo it; planting a dense orchard should not hope for paclobutrazol. The appropriate planting distance should be determined according to the degree of dwarfing of the rootstock and the scion variety.
3. Young tree shaping, increase the amount of branches . 1 trigger new shoots to increase the amount of branches. Use artificially synthesized cytokinin (benzyl adenine) or polymalin (cytokinin + gibberellin) to spray 150-600 μl/L in the new shoots from June to July, 5-7 days. The secondary tip is germinated, generally 5-7 can be issued, and up to 18 secondary tips can be issued. 2 整形 internal plastic surgery, cultivation with branching seedlings. With 150-600 μl/L benzyl adenine or promonin, when the seedling grows to a suitable height (when the dry height is satisfied), the sprayed seedlings with larger base angle can be cultivated. 3 fixed-point orientation makes the buds emit long branches with large angles. During the growth period, a 100 μl/L ointment formulated with benzyl adenine and lanolin is applied under the buds of the desired hair shoots to promote budding of the buds.
4. Promote fruit setting and increase fruit . Treatment of hawthorn in the early flowering stage with 10-100 μl/L gibberellin can increase the fruit setting rate. Treatment of Kyoho grapes that cause fruit drop due to the growth of new shoots can also increase the fruit set rate. In the full bloom period, the use of 50-100 microliters/liter and 20-25 microliters/liter of gibberellin in the pear, Jingbai pear and pear can increase the fruit setting rate; use gibberellin 5-20 μl/L. The first time the flowering period is sprayed, after 2 weeks, the “nuclear white†grape is sprayed with 20-40 μl/L gibberellin, and combined with the mother branch to cut, the fruit is doubled.
5. Prevent fruit drop before harvest. After treatment with 20-40 μl/L naphthaleneacetic acid and 1000-2000 μl/L, the fruit drop before harvest is reduced and the coloration is improved.
6. Advance or delay fruit ripening. In the Shali system, 100 μl/L ethephon is sprayed 20-30 days before fruit ripening, and 400-800 μl/L ethephon is used in the autumn pear system. The concentration of weak trees is low, and the concentration of Wangshu is high. After 135- Spraying in 140 days, it can mature 14-20 days in advance.
7. Prevent the germination and root growth of long branches. Apply 0.5%-1% naphthaleneacetate lanolin to the large cutting saw to prevent the growth of long branches. For the dwarf anvil which is easy to produce roots, spraying on the roots for 20-30 days can effectively inhibit the growth of roots.
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