Traditional logistics of residue removal is expensive and energy demanding, such as the procedures adopted for removing remaining stumps on forest biomass production. When considered as a biomass source, stumps can contribute to minimizing problems related to the restriction of the use of the area in terms of the use of the machines and operational quality, bringing economic and energy benefits or at least, avoiding costs. Therefore, this study aimed at evaluating the operational, economic and energy viability of a mechanized-harvesting system for collection of eucalyptus stumps. So, data related to the work capacity of the equipment were obtained by means of a time and motion of mechanized operations of stumps removal, carrying, processing, and transportation. A model was used to evaluate scenarios and to identify the critical variables. Results showed that the mechanized system used for stumps and roots removal, is operationally and economically viable and provides higher energy performance for this biomass. Total energy input (EI) of the system was 14.3 GJ ha⁻¹, energy intensity 406.8 MJ t⁻¹, EROI was 28.2 for 33 MJ MJ⁻¹ and 4.0 for 4.3 MJ MJ⁻¹ year⁻¹ and a positive energy balance of 434.3 MJ ha⁻¹. The final cost of producing of eucalyptus stump chips was 37.87 USD t⁻¹, savings of USD 2.13 t^-1 were obtained for the additional biomass. Restrictions for using this system refer to the minimum area and transportation distance. Additionally, variations in productivity, market price of biomass, and field operational capacity would affect the economic viability of this alternative.

传统的残留物清除物流成本高昂且需要能源，例如为清除森林生物质生产中的剩余树桩而采用的程序。当被视为生物质来源时，树桩有助于最大限度地减少与机器使用和操作质量方面的区域使用限制相关的问题，带来经济和能源效益，或至少避免成本。因此，本研究旨在评估用于收集桉树树桩的机械化收获系统的操作、经济和能源可行性。因此，通过树桩清除、搬运、加工和运输的机械化操作的时间和运动，获得与设备工作能力相关的数据。模型用于评估情景并确定关键变量。结果表明，用于去除树桩和根部的机械化系统在操作和经济上都是可行的，并为这种生物质提供了更高的能源性能。系统的总能量输入 (EI) 为 14.3 GJ ha^-1，能量强度406.8 MJ t ^-1，33 MJ MJ ^{-1 的}EROI为28.2，4.3 MJ MJ ^-1 year ^{-1 的}EROI为4.0，正能量平衡为434.3 MJ ha ^-1。桉树树桩切片的最终生产成本为 37.87 美元 t ^-1，额外的生物质节省了 2.13 美元 t ^-1。使用该系统的限制是指最小面积和运输距离。此外，生产力、生物质市场价格和现场操作能力的变化会影响这种替代方案的经济可行性。