Federal Institute of Education, Science and Technology of Amapá, Campus Agrícola Porto Grande. Street BR 210, Km,103, S/N, zona rural, Porto Grande, 68997-000, Amapá, Brazil.
Institute of Biological Sciences, Federal University of Pará, Street Augusto Corrêa, Guamá, Belém, Belém, 66075-110, PA, Pará, Brazil.
Sci Rep. 2024 Sep 29;14(1):22546. doi: 10.1038/s41598-024-74356-x.
The production of açaí seed waste from the commercial and extractive exploitation of the Euterpe oleraceae palm tree is a serious problem that contributes to environmental contamination and production of greenhouse gases, a fact that suggests the need for an environmentally correct destination for this waste produced on a large scale. To this end, this study was conducted to evaluate the potential of acaí seed biochar (BCA) in mitigating the toxic effects of copper in Brazilian mahogany plants, analyzing biometrics and gas exchange. The experimental design was in randomized blocks, with five blocks, in a 4 × 3 factorial scheme, corresponding to the control (without Cu) and three concentration of Cu (200, 400, and 600 mg Cu kg) and three levels of BCA (0%, 5% and 10%) proportional to the amount of soil in the pots, totaling sixty experimental units. The use of 5% BCA in soils contaminated with up to 200 mg kg Cu promoted biometric increase (height, diameter, number of leaves), maintaining gas exchange (photosynthesis, stomatal conductance, transpiration, internal carbon and internal/external carbon), and consequently, maintaining water use efficiency in plants under abiotic stress, resulting in plant growth. The findings of this study allow us to indicate the use of biochar in remediating and improving the growth of plants grown in copper-contaminated soils. The production of biochar from açaí seeds is an ecologically sustainable alternative, because it reduces its accumulation on public roads and contributes to reducing soil pollution. In the context of public policies, biochar production could be a source of income in the context of the bioeconomy and circular economy practiced in the Amazon, because it is produced in large quantities.
从商业和提取方式开发食用巴西莓的过程中产生的巴西莓籽废料是一个严重的问题，会导致环境污染和温室气体的产生，这一事实表明需要为这种大规模生产的废料找到一个环境友好的处理方式。为此，本研究旨在评估巴西莓籽生物炭（BCA）在减轻铜对巴西桃花心木植物的毒性影响方面的潜力，分析生物计量和气体交换。实验设计采用随机区组设计，有五个区组，在 4×3 析因方案中，对应于对照（无 Cu）和三个铜浓度（200、400 和 600mg Cu kg）和三个生物炭水平（0%、5%和 10%），与盆中土量成比例，共 60 个实验单位。在土壤中使用 5%的 BCA，可减轻高达 200mg kg Cu 的污染，促进生物计量增加（高度、直径、叶片数），保持气体交换（光合作用、气孔导度、蒸腾作用、内部碳和内部/外部碳），从而维持植物在非生物胁迫下的水分利用效率，促进植物生长。本研究的结果表明，可以使用生物炭来修复和改善在铜污染土壤中生长的植物的生长。利用巴西莓籽生产生物炭是一种生态可持续的替代方法，因为它减少了其在公共道路上的积累，并有助于减少土壤污染。在公共政策方面，生物炭生产可以成为生物经济和循环经济在亚马逊地区实践的收入来源，因为它的产量很大。
