Indole-3-butyric acid (IBA)
From the end of February to mid-March, select the middle and lower sections of annual plants with a length of 10 to 15 cm and a diameter of 0.4 to 0.8 cm as cuttings. Seal the upper incision of the cuttings with wax, and use 5000 mg/L of indole-3-butyric acid (IBA) to dip the Chinese kiwifruit hard branch cuttings in a quick method of immersion for 3 seconds. Then, the cuttings are cultivated in a sterilized sandy soil seedling bed. The cutting survival rate reaches 81g% to 91.9%, and on average, more than 10 roots are produced per cutting. It should be noted that for hard branches, the soil temperature of the seedling bed should be controlled at 19 to 20 degrees during cutting, and it can be adjusted at 21 to 25 degrees after the wound heals.

ypes and functions of plant growth regulators
Currently, the substances that have been found to regulate plant growth and development mainly include: Auxin, which promotes cell division and differentiation and increases fruit setting rate; Gibberellic Acid GA3, which promotes stem and leaf growth, balances nutrition, protects flowers and fruits, and makes fruits swell; ethylene, which breaks the dormancy of plant seeds and seedlings, promotes fruit ripening, and promotes leaf aging; Cytokinin, which promotes cytoplasmic division and lateral cell elongation; abscisic acid, which promotes leaf shedding and regulates the development of seeds and embryos; Brassinolide, which increases chlorophyll content, improves photosynthesis efficiency, promotes root growth, and protects flowers and fruits.

Indole-3-butyric acid (IBA) + Sodium α-naphthyl acetate
Spray seedlings with 10-20 mg/L concentration of indole-3-butyric acid (IBA) + Sodium α-naphthyl acetate or treat seeds with 10mg/L.
Chlormequat Chloride (CCC)
Spraying the leaves of seedlings with 100-500mg/L Chlormequat Chloride (CCC) solution can shorten internodes, thicken leaves and make them green, and resist drought and cold.

Triacontanol has a significant promoting effect on fruit trees, including promoting bud eye differentiation, improving fruit quality, reducing fruit drop, and increasing fruit color change and yield.