摘要
通过对7株天然光皮桦的树干解析,发现树高在前5年生长较慢,第5～25年增长较快;胸径生长在第10年后速度加快,可以持续到第40年左右,光皮桦的胸径生长可以维持较长的时间;材积在第20～30年后增长较快,可以持续到第50年仍保持较高水平的增长。同时发现单株间在树高总生长、平均生长、连年生长、胸径总生长、平均生长、连年生长、材积总生长、平均生长、连年生长、生长率和形数等均存在差异,这与各单株的遗传背景、立地条件和林分条件有关。
Stem analysis was conducted on 7 natural Betula luminifera trees in Qingyuan Forest Farm, Zhejiang province. The result showed that height growth was slow in the first 5 years, but increased from 5^th to 25^th year, DBH growth was faster after from the 10^th year till about the 40^th year, and volume increased quickly from the 20 - 306 year, and continued to grow for 50 years. The analysis also showed that 7 individuals had difference in height increment, DBH and volume increment, form factors and growth rate of volume, indicating relation with genetic background, site condition and stand condition.
出处
《浙江林业科技》
北大核心
2009年第4期73-77,共5页
Journal of Zhejiang Forestry Science and Technology
基金
浙江省重大科技攻关专项重大项目(2008C02004-1)
关键词
光皮桦
生长特性
生长规律
树干解析
单株
Betula luminifera
growth character
growth law
stem analysis
individual
