Most people who are engaged in agricultural planting are familiar with gibberellins. Basically, gibberellins are indispensable in the growth and development of crops. However, the time and amount of gibberellins used in different crops will vary. Differences, let's take a look at how to use gibberellin to increase production of 20 crops such as lettuce, eggplant, pepper, tomato, etc.
1. Lettuce
Lettuce seeds are soaked in 200mgL concentration of gibberellin solution at 30~38℃ for 24 hours, which can successfully break dormancy and germinate early.
2. Potatoes
Soak potatoes in 0.5~2mg/L concentration gibberellin solution for 10~15 minutes, or soak whole potato in 5~15 mg/L concentration gibberellin solution for 30 minutes, which can relieve the dormancy period of potato tubers. Early germination, and lateral buds are urged, the growth of young shoots is accelerated, stolons occur early, and the expansion period of tubers is prolonged. Varieties with short dormancy periods should be used at lower concentrations, while those with longer dormancy periods should be used at higher concentrations.
3. Apple
Spraying the gibberellin liquid with a concentration of 2000~4000mg/L in early spring can break the dormancy of apple buds and has a significant effect.
4. Strawberry
It can break the dormancy of strawberry plants. In the promotion and semi-promoting cultivation of strawberries in greenhouses, after covering the greenhouse for 3 days, that is, when the flower buds appear more than 30%, spray 5mL of gibberellin liquid with a concentration of 5~10mg/L per plant. The spray heart leaves can make the top inflorescence bloom in advance, promote growth, and mature earlier.
5. Eggplant

　　The low-concentration gibberellin solution can break the shallow dormancy of eggplant seeds, and lift the germination potential and germination rate of the seeds. Soaking the seeds with 50-100mg/L gibberellin solution at room temperature for 8 hours has the best effect. For eggplant varieties with moderate dormancy, hormones must be used to break seed dormancy regardless of germination test or seedling raising. The recommended concentration is 500mg/L for 24 hours. The gibberellin liquid with a concentration of 25-35mg/L is sprayed once during the flowering period to prevent flower drop, promote fruit setting and increase yield.
6. Soybeans
Soaking seeds with 3.5 mg/L gibberellin liquid can effectively speed up the initial germination speed of spring sowing soybeans at 10-15 °C, significantly accelerate the growth rate of young roots, and increase the fresh and dry weights of young roots.
7. Sweet potato
Immerse the potato pieces in 10~15mg/L concentration of gibberellin liquid dilution for 10 minutes, then take them out to dry and then raise seedlings in hotbeds, which can break the dormancy period, emerge seedlings earlier, save the amount of seeds used, and strive for the season.
8. Sorghum
Soaking seeds with 5~10mg/L gibberellin liquid can promote germination, stimulate hypocotyl elongation and increase dry weight, and seedlings emerge significantly earlier.
9. Camellia oleifera
Soaking seeds with 20mg/L concentration of gibberellin for 4 hours can speed up the germination rate.
10. Cotton
Soaking seeds with 20mg/L concentration of gibberellin for 6-8 hours can reduce adversity such as low temperature, delay germination or cause rotten seeds, and promote cottonseed germination.
11. Grapes
From 5 days before flowering to the beginning of flowering, dipping the ear with 60mg/L gibberellin can significantly improve the fruit setting rate of grapes. 100-150mg/L and 100mg of gibberellin were used in the 11-14 days of the full-flowering period and 10 days after the full-flowering period, respectively. /L dipping the ear of fruit twice to prevent flower drop and fruit drop.
12. Tomato
Using 30~35 mg/L concentration of gibberellin liquid to spray flowers once during the flowering period can improve the fruit setting rate and prevent hollow fruit.
13. Citrus
After the first early physiological fruit drop, spray gibberellin at a concentration of 50 mg/L once, or spray 50 mg/L once 7 days after flowering and after the first early physiological fruit drop to before the second physiological fruit drop. concentration of gibberellin. In case of high temperature and dry weather during the flowering and fruiting period, the use of gibberellin should be combined with proper watering of the orchard. When spraying, adding 0.2% urea, 0.2% phosphorus and potassium source pool and 0.2% borax to the gibberellin solution can improve the effect of preserving flowers and fruits.
14. Kiwi
The 2% gibberellin lanolin coated pedicels can significantly reduce the number of seeds of kiwi fruit, induce the formation of seedless fruit, and reduce the rate of fruit abscission.
15. Chili
Using 20~40mg/L concentration of gibberellin liquid to spray flowers once during the flowering period can promote fruit setting and increase yield.
16. Watermelon
Spraying gibberellin at a concentration of 20-50mg/L once during the flowering period, or spraying the young melon once at the young melon period, can promote the growth and yield of the young melon.
17. Winter Melon
Spraying gibberellin at a concentration of 20-50mg/L once during the flowering period, or spraying the young melon once at the young melon period, can promote the growth and yield of the young melon.
18. Pumpkin
Spraying gibberellin at a concentration of 20-50mg/L once during the flowering period, or spraying the young melon once at the young melon period, can promote the growth and yield of the young melon.
19. Cucumber
Spraying gibberellin at a concentration of 20-50mg/L once during the flowering period, or spraying the young melon once at the young melon period, can promote the growth and yield of the young melon.
20. Rapeseed
Before transplanting rapeseed, dip the seedling roots with 20mg/L concentration of gibberellin solution to promote the early growth of the plants and increase the yield. Spraying 25mg/L gibberellin on the leaves at the full flowering stage can improve the seed setting rate of rapeseed.
In general, gibberellin can not only promote the growth of crop stems and leaves, but also play a significant role in improving its resistance to stress and germination rate. However, farmers need to pay attention that gibberellin is a plant growth hormone such as It can only be effective when the supply of fertilizer and water is good, and it cannot replace fertilizer. If you want to increase production, it is best to mix it with urea.