摘要
通过定位观测取得的数据,对不同林龄两代杉木人工林生物量积累特征进行研究,并对第1代、第2代杉木林进行了比较。结果表明:7、14、20年生两代杉木单株生物量和林分生物量均随林龄增大而增加。树叶、树枝生物量随着林龄增长所占比例逐渐减小,但树干生物量比例逐年增大,树根生物量变化不明显。7、14、20年生第2代杉木林的单株生物量比1代分别下降了18.68%、7.44%、4.77%。7、14、20年生第2代杉木林的林分生物量比1代分别下降了45.92%、7.48%、4.78%。第1代杉木林的树干、树皮生物量大于第2代,而枝、叶和根的生物量基本小于第2代。
Study on characteristics of biomass accumulation of two-generation Chinese fire at different ages was made by analyzing the data from located observation.Comparison between the 1st and 2nd generation Chinese fir was made at the same time.Results showed that individual biomass and stand biomass of 2nd generation at the age of 7,14 and 20 increased with age.Biomass of leaves and branches took decreasing portion as the tree age increased,while biomass of stem showed the opposite.There was no obvious change in biomass of root.Individual biomass of 2nd generation at the age of 7,14 and 20 decreased by 45.92%,7.48% and 4.78% respectively than that of 1st generation.Biomass of stem and bulk of 1st generation was larger than that of the 2nd generation,however,biomass of leaves,branches and root showed the opposite scenario.
出处
《广西林业科学》
2011年第2期81-84,78,共4页
Guangxi Forestry Science
基金
国家野外科学观测研究站项目(20060515
200708227)
国家林业局项目(2007537
201042
200881)
关键词
杉木
人工林
生物量
积累
林龄
Chinese fir
plantation
biomass
accumulation
tree age
