In recent years, with the continuous expansion of greenhouse and greenhouse vegetable cultivation areas, plant growth regulators are being widely used in the production and storage of vegetables.
1. Break the dormancy and promote germination. Vegetables are soaked in naphthaleneacetic acid solution (20 kg per gram of water) for about 6 hours before sowing to promote germination; some cold vegetables, such as celery and lettuce, are difficult to germination before sowing, if the concentration is 1000 Soak the lettuce seeds in milligrams/liter of benzyl adenine solution for 3 minutes, and germination after 10 hours at 30 degrees Celsius; if soaking for 2-4 hours with 1000 mg/L gibberellin solution, the germination rate can be increased. Up to 70%; while the autumn sowing potato, soaking in the 0.5-1ppm gibberellin solution for 10-30 minutes when the seed potato is cut, can release the dormancy.
2. Promote growth and increase production. For example, two-week spraying of 20-100ppm gibberellin solution two weeks before celery harvest, while strengthening fertilizer management, the yield can be increased by about 30%; 10-16 days before the harvest of leeks, using 10-30ppm gibberellin solution leaves Spray 2-3 times, the yield can be increased by more than 20%; use naphthalene acetic acid solution (50 kg per gram of water) to spray the stems once every 10-15 days in the growing period of cucumber and eggplant, spray a total of 3-4 Times, can lead to early results and increase production.
3, to prevent falling off, preserve flowers and preserve fruit. When the greenhouse is cultivated in low temperature season, the tomato pollination is poor and the fruit setting rate is low. In the early flowering stage, the peduncle is applied with the 2,4-D solution at a concentration of 10-30 mg/L, or when the flower is opened at half of each inflorescence. Spraying the tomato spirit solution at a concentration of 20-30 mg/L can effectively increase the fruit setting rate. In other vegetables, the types and dosages of the medicines are slightly different. For example, eggplant can be used in the 2,4-D solution of 15-30 mg/L; the pepper can be sprayed with a naphthalene acetic acid solution at a concentration of 5 mg/L; 2-3 days after the opening of the female flower, spray the melon with a concentration of 100-500 mg / liter of gibberellin solution to prevent the melon; for the zucchini, the concentration can be 15-25 mg / liter in the initial stage of flowering 2 , 4-D solution, etc.
4. Stimulate rooting and increase the survival rate of cuttings. Soak the axillary buds of cabbage and Chinese cabbage with a concentration of 2000 mg / liter of naphthaleneacetic acid solution (2 - 3 seconds), then place the cuttings in an environment with a temperature of 20-25 ° C and a relative humidity of 85% - 95%. The survival rate is 90%.
5. Suppress the length of the child and cultivate strong seedlings. During the period of tomato seedling growth, the soil can be watered with a solution of 250-500 mg/L of chlormequat. The dosage is 1 kg of liquid per square meter, which can inhibit the growth of stems and leaves. In the growing season of radish, 15% per acre. 50 grams of paclobutrazol spray evenly on 50 kg of water, which can control the growth of the aboveground part of the radish and promote the increase of tuber.
6. Control the gender of the flower. In the flower bud differentiation stage, such as in the 2-4 leaf stage, treatment of cucumber and pumpkin with a solution of 100-200 mg / liter of ethephon can reduce the female flowering node, increase the female flower ratio, and improve the early yield; Increase the amount of watering and fertilization. On the contrary, when the "flower topping" is formed due to low temperature, soil drought and the use of ethephon concentration is too high, the concentration of 50-100 mg / liter of gibberellin solution can be used to alleviate, increase the number of male flowers, and restore normal growth and development.
7, inhibit germination, prolong sleep. When the leaves of the onion and garlic begin to wither before the harvest, spray the concentration of 2500 mg / liter of sapphire and then harvest, dry and store, can prolong sleep to 6 months; 20 days before the potato harvest, spray concentration of 2500 mg / liter The chlorophyll solution, or the 2,4-D solution with a concentration of 100 mg/L 7 days before harvest, has the effect of prolonging storage and inhibiting germination.
8, fresh after harvest. 7 days before the harvest, the 2,4-D solution with a concentration of 25-50 mg/L was sprayed, and the 2,4-D solution with a concentration of 100-250 mg/L was sprayed 5 days before the cabbage harvest, which can reduce the storage period. After the broccoli is harvested, it is mixed with paper dust soaked with methyl naphthaleneacetate, and 50-200 grams per 1000 flower bulbs can reduce the storage period and extend the storage period by 2-3 months.
1. Break the dormancy and promote germination. Vegetables are soaked in naphthaleneacetic acid solution (20 kg per gram of water) for about 6 hours before sowing to promote germination; some cold vegetables, such as celery and lettuce, are difficult to germination before sowing, if the concentration is 1000 Soak the lettuce seeds in milligrams/liter of benzyl adenine solution for 3 minutes, and germination after 10 hours at 30 degrees Celsius; if soaking for 2-4 hours with 1000 mg/L gibberellin solution, the germination rate can be increased. Up to 70%; while the autumn sowing potato, soaking in the 0.5-1ppm gibberellin solution for 10-30 minutes when the seed potato is cut, can release the dormancy.
2. Promote growth and increase production. For example, two-week spraying of 20-100ppm gibberellin solution two weeks before celery harvest, while strengthening fertilizer management, the yield can be increased by about 30%; 10-16 days before the harvest of leeks, using 10-30ppm gibberellin solution leaves Spray 2-3 times, the yield can be increased by more than 20%; use naphthalene acetic acid solution (50 kg per gram of water) to spray the stems once every 10-15 days in the growing period of cucumber and eggplant, spray a total of 3-4 Times, can lead to early results and increase production.
3, to prevent falling off, preserve flowers and preserve fruit. When the greenhouse is cultivated in low temperature season, the tomato pollination is poor and the fruit setting rate is low. In the early flowering stage, the peduncle is applied with the 2,4-D solution at a concentration of 10-30 mg/L, or when the flower is opened at half of each inflorescence. Spraying the tomato spirit solution at a concentration of 20-30 mg/L can effectively increase the fruit setting rate. In other vegetables, the types and dosages of the medicines are slightly different. For example, eggplant can be used in the 2,4-D solution of 15-30 mg/L; the pepper can be sprayed with a naphthalene acetic acid solution at a concentration of 5 mg/L; 2-3 days after the opening of the female flower, spray the melon with a concentration of 100-500 mg / liter of gibberellin solution to prevent the melon; for the zucchini, the concentration can be 15-25 mg / liter in the initial stage of flowering 2 , 4-D solution, etc.
4. Stimulate rooting and increase the survival rate of cuttings. Soak the axillary buds of cabbage and Chinese cabbage with a concentration of 2000 mg / liter of naphthaleneacetic acid solution (2 - 3 seconds), then place the cuttings in an environment with a temperature of 20-25 ° C and a relative humidity of 85% - 95%. The survival rate is 90%.
5. Suppress the length of the child and cultivate strong seedlings. During the period of tomato seedling growth, the soil can be watered with a solution of 250-500 mg/L of chlormequat. The dosage is 1 kg of liquid per square meter, which can inhibit the growth of stems and leaves. In the growing season of radish, 15% per acre. 50 grams of paclobutrazol spray evenly on 50 kg of water, which can control the growth of the aboveground part of the radish and promote the increase of tuber.
6. Control the gender of the flower. In the flower bud differentiation stage, such as in the 2-4 leaf stage, treatment of cucumber and pumpkin with a solution of 100-200 mg / liter of ethephon can reduce the female flowering node, increase the female flower ratio, and improve the early yield; Increase the amount of watering and fertilization. On the contrary, when the "flower topping" is formed due to low temperature, soil drought and the use of ethephon concentration is too high, the concentration of 50-100 mg / liter of gibberellin solution can be used to alleviate, increase the number of male flowers, and restore normal growth and development.
7, inhibit germination, prolong sleep. When the leaves of the onion and garlic begin to wither before the harvest, spray the concentration of 2500 mg / liter of sapphire and then harvest, dry and store, can prolong sleep to 6 months; 20 days before the potato harvest, spray concentration of 2500 mg / liter The chlorophyll solution, or the 2,4-D solution with a concentration of 100 mg/L 7 days before harvest, has the effect of prolonging storage and inhibiting germination.
8, fresh after harvest. 7 days before the harvest, the 2,4-D solution with a concentration of 25-50 mg/L was sprayed, and the 2,4-D solution with a concentration of 100-250 mg/L was sprayed 5 days before the cabbage harvest, which can reduce the storage period. After the broccoli is harvested, it is mixed with paper dust soaked with methyl naphthaleneacetate, and 50-200 grams per 1000 flower bulbs can reduce the storage period and extend the storage period by 2-3 months.
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