镀铜
短轮伐期林业
生物量(生态学)
体积热力学
锥面
旋转(数学)
短轮伐矮林
胸径
数学
功能(生物学)
环境科学
植物
木本植物
生物
几何学
农学
物理
量子力学
进化生物学
作者
Mohammed Benbrahim,André Gavaland
标识
DOI:10.1080/02827580310005171
摘要
A new stem taper function was established for individual trees of two poplar hybrid clones grown on a short-rotation coppice. The model could be easily fitted and required three parameters to be estimated. It can be used to estimate both diameter at a given height and height for a given top diameter. Two of the three parameters controlled the conical and the neiloid parts of the stem. Significant differences in these parameters were observed between the two clones even if no differences were observed for diameter at breast height or total height of the stem. The model could not be integrated to calculate volumes (total volume, merchantable volume), which were estimated by numerical integration. However, use of this new model allows the optimal length of billets to be determined and thus maximizes the merchantable biomass of poplar in short-rotation coppice by minimizing the biomass of residues.
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