Bioenergy can contribute to low-carbon economy of Latin-America and African countries, where the biomass is a viable alternative to obtain a global energy matrix. The harvesting forest residue left on the ground of industrial tree plantations appears an option to be a biomass source to supply a combined heat and power plant. The goals of this study were to know the biomass production and the fuel quality of stumps and coarse roots from a commercial-scale harvesting operation of Eucalyptus under coppice regime in Brazil. To accomplish this objective, the stumps of two Eucalyptus commercial clones were evaluated entirely. Forest inventory data were combined with sampling procedures of the stump (which was removed with a front wheel loader) to obtain the biomass production. The physical and the chemical composition of stumps and roots were determined at the laboratory according to ASTM standards. Guiding values for concentrations of combustion-relevant elements in solid biofuels were introduced. The results showed that stump and its properties were statistically affected by variation factors (clone and rotation). The properties qualified the use of eucalypt stump and coarse roots biomass for energy purposes and suggested a minor unwanted component formed during the burning. Stump biomass production was at least 36 Mg ha⁻¹ after six years of planting, totaling an energy yield of 626 GJ ha⁻¹. Although the results found were suitable for the bioenergy scenario, the environmental sustainability of stump harvesting on forestry site must be studied carefully before its indiscriminate use.

生物能源可以促进拉丁美洲和非洲国家的低碳经济，在这些国家，生物质是获取全球能源矩阵的可行替代方案。留在工业人工林地面上的森林采伐残余物似乎可以作为生物质来源来供应热电厂。这项研究的目的是要了解在巴西的小灌木林政权下，以桉树为商业规模的收获活动，其树桩和粗根的生物量生产以及燃料质量。为了实现这个目标，两个桉树的树桩对商业克隆进行了全面评估。将森林清查数据与树桩的采样程序结合起来（用前轮装载机将其移除）以获得生物量产量。树桩和根的物理和化学组成在实验室根据ASTM标准确定。介绍了固体生物燃料中与燃烧有关的元素浓度的指导值。结果表明，树桩及其属性受统计因素（克隆和旋转）的影响。这些特性可以将桉树树桩和粗根生物质用于能源用途，并表明在燃烧过程中形成了少量有害成分。树桩的生物量产量至少为36 Mg ha ^-1经过六年的种植，总共产生了626 GJ ha ^-1的能量。尽管发现的结果适用于生物能源，但是在滥砍滥伐之前，必须仔细研究林场采伐树桩的环境可持续性。