Abstract:

On the base of forty two early experiments for nine years, the one year-old-superior Betula platyphylla seedling dealing with five coordinative methods (proper concentration carbon dioxide, appropriate hormone spraying, right intensity of illumination, timely wring shear, mezzo control of temperature and humidity) could flower at age of 2～3 years old and seed at large scale at 3～4 years old. However, in the nature condition the B. platyphylla could not seed until at age of 17～20 years old. Besides, in this experiment the integrated and holographic time sequence system which can automatically monitor and display was developed.

Key words: Betula platyphylla, Intensive breeding, Early flowering and seeding