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中文摘要：
通过调查不同胸径树高（DBH）的邓恩桉地上和地下生物量,用DBH和地上各器官的生物量推算根系生物量。研究结果表明,根据邓恩桉的DBH建立的线性、幂函数和多项式回归方程推测根生物量均可达到极显著水平。以树干、树枝和树叶等器官生物量与根系生物量的关系建立的各类回归方程中,根系生物量与各器官的幂函数回归方程均达到显著水平。
英文摘要：
The root biomass was reckoned by the data of DBH（diameter at breast height） and the biomass of aboveground organs investiged above nd below-ground biomass of Eucalyptus dunii with different DBH.The results showed that the root biomass could be speculated significantly by the egression equations of linear,power function and polynomial established with the relationship of the root biomass of E.Dunii and DBH.Among the egression equations built by the relationships between the biomass of trunk,branch and leaves and the roor biomass,all of the regression equations of ower function were significantly.
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