6-Benzylaminopurine was the first synthetic cytokinin. 6-BA has various effects such as inhibiting the decomposition of chlorophyll, nucleic acid and protein in plant leaves, preserving green and anti-aging Chemicalbook; transferring amino acids, auxins, inorganic salts, etc. to the treatment site, etc. It is widely used in agriculture, fruit trees and horticultural crops from germination. to all stages of harvest.