Different doses of active root promoters were used to treat Rhododendron
in spring. 15 days after treatment, it was found that active root promoters promoted
the formation and growth of new roots in different degrees, among which active root
promoters 4 The effect of mg / L treatment area was the most obvious, which increased
the number of root basins of the Yellow seedlings by 2.656 times compared with the
control, and increased the length and growth range of the new roots of the normal
seedlings by 49.7% and 8% respectively, which had a high value in production.