Climate-sensitive tree height–diameter allometry for Chinese fir

作   者：张雄清，Sophan Chhin,符利勇，鲁乐乐，段爱国，张建国
期刊名称：Forestry
影响因子：2.638
卷 期 号：
页     码：1-10
关键词：
论文摘要：
Tree height–diameter allometry is crucial in regulating forest ecosystem structure and estimating biomass
and carbon storage. Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.) is the most widely planted tree species
across subtropical China. Yet our understanding of how height–diameter allometry of Chinese fir relates
to climate over different sites is limited. Remeasured data of 60 plots were used to explore height–diameter
allometry of Chinese fir in relation to climate using a three-level NLME approach. The data consisted of five initial
planting densities distributed in Fujian, Jiangxi, Guangxi and Sichuan provinces (sites) in subtropical China.
Results showed that tree heights increased with increasing mean annual temperature (MAT) and mean warmest
month temperature (MWMT) and decreased with increasing annual heat–moisture index (AHM) and summer
mean maximum temperature (SMMT). The contribution of MAT to height–diameter allometry was larger
than AHM, SMMT and MWMT, which suggested that temperature was a key climate factor that shapes height–
diameter allometry of Chinese fir in subtropical China. Trees planted at a higher density level of
6667–10 000 trees ha−1 were slenderer than those planted at a lower density level of 1667–5000 trees ha−1.
The scale of height–diameter allometry of Chinese fir nearly held constant in the four sites and was close to
0.5 predicted by the stress-similarity model. Our results will help further understanding of the climate sensitivity
affecting the height–diameter allometry of Chinese fir plantations.