Branching and growth of plantings in fifty year of a seeding seed orchard of Masson pine (Pinus massoniana Lamb.)

摘要

The features of branching and growth studied included height, diameter at breast height (DBH), total number of branches, annual height growth, annual branch elongation in the year of elongating, annual branch number for four consecutive years, diameter of branches of different ages, and diameter of stem where branch-whold originates. For features of total growth and overall branching, no significant differences were found between families, except for DBH. For annual features, no signifi- cant differences were found in annual stem height growth, annual branch elongation in the year of elongation and diameter of branches. In the last four years, differences in number of branches were not significant in the first two years but were significant in the last two year; differences in stem diameter where branch-whorls grow were significant for the four consecutive years.