Gibberellic acid is a spectral plant growth regulator that not only promotes the growth of a variety of crops, but also delays aging and preservation. What are the effects of gibberellic acid? How is the amount of gibberellic acid used on different crops? Here? Let's follow the Xiaobian to understand.
First, promote vegetative growth
1. Spray the leaves with 50-100mg/kg liquid solution twice a week before celery harvest.
2. Spinach leaves 1-2 times 3 weeks before harvest, which can increase stems and leaves.
Second, delay aging and preservation
1. Garlic moss is immersed in the base of garlic moss for 10-30 min with 50 mg/kg liquid.
2, citrus green fruit period with 5-15mg / kg liquid spray fruit 1 time.
3. After harvesting the banana, use 10mg/kg liquid to soak the fruit.
4, cucumber, watermelon before the harvest with 10-50mg / kg liquid spray, can play a role in preservation.
Third, regulate flowering
1. The chrysanthemum vernalization stage is sprayed with 1000mg/kg liquid.
2, cyclamen bud period with 1-5mg / kg liquid spray buds can promote flowering.
Fourth, promote the formation of fruit set or seedless fruit
Usage: 1. Cucumber flowering period with 50-100mg/kg liquid spray 1 time to promote fruit setting and increase production.
2. 7-10 days after the flowering of the grape, the rose fragrant grape sprays the ear with 200-500 mg/kg liquid to promote the formation of no stone.
Fifth, break the dormancy and promote germination
1. Dip the tubers with 0.5-1mg/kg liquid for 30min before sowing.
2. Soaking seeds with 1mg/kg liquid before sowing can promote germination.
6. Improve the seed setting rate of hybrid rice seed production
Generally, it starts at the time of 15% heading of the female parent, and is sprayed 1-3 times with 25-55 mg/kg of liquid medicine at the end of 25% heading. Use low concentration first, then use high concentration.
Note the use of gibberellic acid:
1, gibberellic acid is small in water solubility, dissolve with a small amount of alcohol or white wine before use, and then dilute to the desired concentration with water.
2. Infertility seeds are increased in crops treated with gibberellic acid, so it is not advisable to apply for cultivation.
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