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I. Formulation and mother liquor formulation The dosage form has 85% crystalline powder, 4% emulsifiable concentrate and 10 mg tablet. Emulsifiable oils and tablets are easily soluble in water and can be formulated directly. The powder is insoluble in water and soluble in alcohol. Therefore, when preparing, take 1g of crystal powder, put it into a measuring cylinder, add a small amount of alcohol or high-concentration liquor, and then dilute it to 1000mL with water, that is, about 1000mg/kg gibberellin mother liquor. Do not heat when dispensing. The water temperature should not exceed 50 °C. When using, take the mother liquor according to the required concentration.
Second, the application technology on vegetables
1. Delaying aging and preservation Before the cucumber is harvested, 25 to 35 mg/kg of melon can be used for a prolonged storage period. Before the watermelon is harvested, the 25-35mg/kg spray melon can prolong the storage period. The garlic clam 40~50mg/kg is soaked in the base of the garlic clam for 10~30min once, which can inhibit the organic matter from being transported and preserved.
2. Preserving flowers and fruits, promoting fruit growth Tomato, 25 ~ 35mg / kg, flowering period 1 time, can promote fruit set, anti-empty hole fruit. Eggplant, 25 ~ 35mg / kg, spray 1 flower at the flowering stage to promote fruit setting and increase production. Capsicum, 20 ~ 40mg / kg, spray 1 flower at the flowering stage to promote fruit set and increase production. Watermelon, 20mg/kg, spray flowering once in the flowering period to promote fruit setting and increase yield. Or immature melon spray 1 time, promote the growth of young melons, increase production.
3. Promote vegetative growth, mention morning celery, 15 to 30 days before harvest, 35 ~ 50mg / kg, spray 3 times a day for 3 to 4 times, a total of 2 times, increase yield by more than 25%, stem and leaf hypertrophy, morning market 5 to 6 days. Amaranth, when the plant is 10cm high or 3 days after harvesting, 20mg/kg spray, increasing yield by more than 15%. Mushroom, 400mg/kg, when the primordium is formed, the immersion block is formed, the fruit body is enlarged, and the yield is increased.
4. Inducing male flowers and increasing seed production yield When planting cucumbers, spraying 50-100 mg/kg gibberellin in 2 to 6 true leaves of seedlings can reduce female flowers, increase male flowers, and make female cucumbers become monoecious.
5. Promote convulsions and flowering, improve the breeding coefficient of fine seeds. Spray plants or drop growth points with gibberellin from 50 to 500 mg/kg to make carrots, cabbage, radish, celery, Chinese cabbage and other two-year growing crops, short days before wintering. Convulsion under conditions.
6. Breaking dormancy Sprouting with 200mg/kg gibberellin at 30~40°C for 24h can successfully break the dormancy of lettuce seeds. This method is safer than the folk deep well cultivating method and stable germination. Break the potato tuber dormancy, 0.5 ~ 2mg / kg gibberellin solution soaked in potato for 10 ~ 15min, or 5 ~ 15mg / kg soaked whole potato for 30min, the short dormancy period is lower, longer and higher. Breaking the strawberry plant dormancy, in the strawberry greenhouse to promote cultivation, semi-promoting cultivation, cover shed for 3 days, that is, when the flower bud appears more than 30%, each plant spray 5 ~ 10mg / kg gibberellin solution 5mL, focus on the heart leaf, It can make the top inflorescence flower in advance, promote growth and mature early.
7. It is an antagonist of inhibitors such as paclobutrazol and chlormequat. Tomato is harmed by excessive use of anti-fallin. It can be relieved with 20mg/kg gibberellin.
Third, matters needing attention
1. Can not be mixed with alkaline substances, but can be mixed with acidic, neutral fertilizers, pesticides, and mixed with urea to increase production. The aqueous solution is easy to decompose and should not be used for a long time.
2. The use of gibberellin can only exert good results under the conditions of sufficient supply of fertilizer and water, and cannot replace fertilizer.
3. It is necessary to grasp the appropriate concentration and period of use. If the concentration is too high, it will appear long and white, until it is deformed or dead, and the effect of low concentration is not obvious. The amount of liquid used for leafy vegetables varies depending on the size and density of the crop plants, and generally the amount of liquid used per 667 m2 is not less than 50 kg.
Gibberellin (920) is a high-efficiency plant growth stimulating hormone that promotes cell and stem elongation, increases plant height, promotes growth of genetically dwarfed plants, and promotes physiological or viral dwarf plants. The growth of seeds, tubers and bulbs of certain vegetables is dormant, the germination rate is increased, the low-temperature vernalization and long-day sunshine are promoted, and the long-day vegetables are promoted and induced to bloom in the same year; the growth of fruits, fruits and fruits are promoted. The effect of gibberellin is more significant under adverse conditions such as low temperature, drought, low light or short daylight.
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