关键词: 杉木, 连栽代数, 生长量, 生长规律

Abstract:

Through analysis on growth process of 29-year-old Chinese fir stand from seed in different rotation of continuous planting in Ancaoxia, Nanping, Fujian, the results showed that, before ten-year-old, the increment of tree height, D B H and volume for the first and the second rotations were close, after that, the growth of the second rotation declined rapidly, the mean individual volume of 29-year-old decreased by 41.46 percent compared with that of first rotation. The growth of tree height, D B H and volume of the third rotation were lesser than those of the second rotation at the beginning, but decline did not occur to a large range at last, the mean individual volume of 29-year-old trees reduced by 17.70 percent compared with that of the second rotation. The fewer of the planting, the earlier of the time reaching peak growth, the bigger of the peak value, and the longer of sustainable time over the fast-growing period.

Key words: Chinese fir, Rotations of continuous planting, Growth increment, Growth pattern