Belowground biomass C outweighs soil organic C of perennial energy crops: Insights from a long‐term multispecies trial
نویسندگان
چکیده
Abstract The cultivation of perennial energy crops (PECs) couples the production ligno‐cellulosic biomass to provision multiple ecosystem services, such as reduction greenhouse gas emissions and mitigation climate change through carbon (C) sequestration in soil. Though C soil by PECs has been widely studied, contribution their belowground (BGB) influence on nitrogen (N) storage potential received very little attention. In this study, N stocks BGB fractions (plant organs fine roots) were measured for six ( Populus spp. ‘Poplar’, Robinia pseudoacacia ‘Black locust’, Salix ‘Willow’, Arundo donax ‘Giant reed’, Miscanthus × giganteus ‘Miscanthus’ Panicum virgatum ‘Switchgrass’) grown marginal soil, 11 years after establishment. All had a higher organic (SOC) stock total (STN) than arable land top (0–10 cm) layer. same layer, woody highest SOC stock. increase under led increased porosity top‐soil On average, 43% was allocated plant (PBO; i.e. rhizomes herbaceous stump PECs). Giant reed PBO, whereas switchgrass lowest (22.7 vs. 5.9 Mg ha −1 ). contrary, roots. (sum contribution) black locust After PEC cultivation, 68% BGB, 32% SOC.
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ژورنال
عنوان ژورنال: Gcb Bioenergy
سال: 2021
ISSN: ['1757-1693', '1757-1707']
DOI: https://doi.org/10.1111/gcbb.12785