关键词: 杉木, 起源, 生长, 产量, 干形, 冠形

Abstract:

Located in lean County, Jiangxi Province, with same age, equal site conditions and silvicultural management, the two kinds of stands were compared in growth, yield and growing process of diameter at breast height (DBH), height and volume by means of whole plot examination and cut sample tree analysis. The results show that stands by sprouting grow faster in the first several years and slow down more quickly than stands by planting. At the age of 22, in poor sites, the difference in DBH between stands by sprouting and by planting is significant, whereas in relative good and good sites, no such difference was discovered; difference in height is significant regardless of site condition; annual volume increment of the two stands is still higher than average, meant that they have not reached quantitative maturity; yield of stands by sprouting varies from 237. 7 to 329. 5m³ a hectare compared with 253. 2-405.9m³/hm² of stands by planting which is remarkably high in good sites. Some suggestions about silvicultural techniques, site selection and management goals concerning Chinese fir regeneration through sprouting were made according to above comparison.

Key words: Cunninghamia lanceolata, Origination, Growth, Yield, Stem and crown characteristic