Gibberellin (90%) is a high-potency plant growth stimulant that promotes elongation of cells and stems, increases plant height, promotes growth of genetic dwarfed plants, and promotes physiological or viral dwarfing plants. Growth; breaking the dormancy of seeds, tubers, and bulbs of certain vegetables, increasing germination rate, cultivating low temperature vernalization and long days, promoting and inducing the long-day vegetable bloom; promoting fruit set, fruit preservation, fruit growth and development Gibberellin is more effective in low temperature, drought, low light or short days and other adverse conditions. A. Formulations and mother liquor formulations are 85% crystalline powder, 4% EC, and 10 mg tablets. Emulsifiable concentrates and tablets are readily soluble in water and can be formulated and used directly. Difficult to dissolve in water powder, soluble in alcohol, so the preparation, take 1g crystal powder, into the measuring cylinder, add a small amount of alcohol or high concentration of liquor dissolved, diluted with water to 1000mL, ie about 1000mg/kg gibberellin mother liquor Do not heat when dispensing, the water temperature must not exceed 50°C, and use the mother liquor according to the required concentration. Second, the application of technology in vegetables 1. Anti-aging and preservation of fresh cucumber before harvest, 25 ~ 35mg/kg gulp 1 time, can extend the storage period. Before harvesting, 25～35mg/kg melon can extend the storage period. Garlic alfalfa 40 ~ 50mg/kg 10 ~ 30min base treatment garlic garlic, can inhibit the upward transport of organic matter, preservation. 2. Flower protection, promote fruit growth tomato, 25 ~ 35mg/kg, flowering spray 1, can promote fruit set, anti-air hole fruit. Eggplant, 25 ~ 35mg/kg, flowering spray 1 time, promote fruit setting, increase production. Pepper, 20 ~ 40mg/kg, spray 1 flowering time, promote fruit setting, increase production. Watermelon, 20mg/kg, spray flowering 1 times to promote fruit set, increase production. Or young larvae spray larvae 1 time, promote the growth of young larvae, increase production. 3. Promote vegetative growth, mentioning celery in the morning, 15 to 30 days before harvesting, 35 to 50 mg/kg, and spraying once every 3 to 4 days for a total of 2 times, increasing production by more than 25%, stem and leaf hypertrophy, and 5 to 6 days in the morning. Leek, sprayed at 20mg/kg 3cm after plant height 10cm or 3 days after harvest, increased 15%. Mushrooms, 400mg/kg, when the primordium was formed, the dip blocks appeared, the fruit body increased, and the yield increased. 4. Inducing male flowers and increasing seed production When cucumbers are used for seed production, spraying 50 to 100 mg/kg gibberellin on 2 to 6 true leaves of the seedlings can reduce female flowers and increase male flowers, so that female plants become male and female. 5. Promote bolting and flowering, increase breeding coefficient, use 50-500mg/kg gibberellin to spray plants or drip growth points, can make carrots, cabbage, radish, celery, Chinese cabbage and other two-year growth of sunshine crops, short-lived before wintering Under conditions of convulsions. 6. Breaking dormancy with 200 mg/kg gibberellin germinates at a high temperature of 30-40°C for 24 hours after germination, and can successfully break the dormancy of lettuce seeds. This method is more convenient than the folk deep well hanging method, and germination is stable. To break the dormancy of potato tubers, a 0.5 to 2 mg/kg gibberellic acid solution was immersed in potato chips for 10 to 15 minutes, or soaked in 5 to 15 mg/kg of whole potatoes for 30 minutes, and the dormancy period of the short-cultivated varieties was lower and longer. To break the dormancy of strawberry plants, in the strawberry greenhouses to promote cultivation, semi-contribution to cultivation, cover shed insulation for 3 days, that is, when the buds appear more than 30%, each spray 5 ~ 10mg/kg 5mL of gibberellic acid, focus on spraying the heart, Can make flowering ahead of flowering, promote growth and mature earlier. 7. Is an antagonist of paclobutrazol, chlormequat and other inhibitors Too much damage due to the use of excessive antioxidants can be used 20mg/kg GA. Third, pay attention to matters 1. Can not be mixed with alkaline substances, but can be mixed with acidic, neutral fertilizers, pesticides, mixed with urea to produce better results. The aqueous solution is easily decomposed and should not be released for a long time. 2. The use of gibberellin can only exert good results under the condition of sufficient supply of fertilizer and water, and it cannot replace fertilizer. 3. Must use the appropriate concentration and the use of the time, the concentration is too high, there will be leggy, white, until the deformity or withered, the concentration is too low, the effect is not obvious. The amount of liquid used for leafy vegetables differs depending on the size and density of the crop plants. Generally, the amount of liquid used per 667m2 is not less than 50kg.
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