Plant growth regulators are substances that have similar physiological and biological effects through the artificial synthesis of plant hormones after understanding the structure and action mechanism of natural plant hormones. In the production of facilities for vegetables, seedlings often use chlorella to control the growth of plants and avoid leggy growth. However, if the concentration is not properly used, the inhibitory effect of plant growth regulators on the plants is difficult to eliminate. After planting, the plants are dwarfed and internode shortened, which has a certain impact on the yield.
A recent survey conducted by technical personnel of the Beijing Agricultural Technology Extension Station found that some of the tomato plants in the solar greenhouse that had been planted had the suppression of seedling growth. After investigation and statistics, some demonstration sites have now opened three panicle flowers, but the average plant height is only 35 cm, the average number of leaves is 12.8, the average internode is only 2.7 cm, the plant is seriously dwarfed, and flowering and fruit setting are also affected.
In view of this situation, it is recommended that farmers use gibberellins to lift the “suppressionâ€. Can use 75% gibberellic acid (920) 50,000 times spray, spray 7-10 days, a total of 1-2 times, or use Bihu 5000 times, 7-10 days 1 times, total processing 2-3 times. At the same time, a small amount of water can be used to promote the growth of the plant, and obvious changes will occur after 5 days.
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