福建省杉木人工林生物量及其分配研究

Biomass and Its Allocation of Chinese Fir Plantations in Fujian Province

通过收集福建省杉木林生物量数据,对福建省杉木林生物量及其分配规律进行分析,结果表明,杉木林生物量随年龄增长呈逐渐增加趋势,并以幂方程拟合的效果最好。杉木林叶和枝生物量占总生物量的比例均随年龄增加而呈明显下降趋势,根占总生物量比例的下降趋势则较小,而干占总生物量比例则随年龄增长而明显增加。叶、枝、干生物量占总生物量比例与年龄拟合的效果较好,且最佳方程均为三次方程。根生物量占总生物量比例与年龄拟合的效果则较差。除年龄对根生物量分配比例有极显著负相关外,降水量对根系生物量分配比例亦有显著的负相关。

Biomass of Chinese fir plantations in Fujian Province and its allocation among leaf, branch, stem and roots were studied based on the published biomass data. Overall, total stand biomass increased with age, and this relation could be fitted well with power equation. The allocation of biomass to leaf and branch obviously decreased with increased age, and the same was true for root but with a slight decrease, while allocation to stem increased substantially with increased age. The cubic equations could be fitted well for these trends for leaf, branch and stem, while no equation was suitable for root. In addition to age, mean annual precipitation was shown significant relation to biomass allocation of root.