Increasing tree productivity does not translate into greater soil organic carbon storage
نویسندگان
چکیده
Increasing soil organic carbon (SOC) storage is one of the promising solutions to mitigate climate change. Fast-growing trees are a potential tool in this context as they rapidly accumulate C their biomass and could transfer more matter (OM) into soil. However, relationship between aboveground productivity SOC remains poorly understood. Five clones with different growth rates were selected from 14-year-old hybrid poplar plantation located New Liskeard, ON, Canada. We collected cores at 87.5 175.0 cm distance stem 0–20, 20–40 40–60 depth for concentration analysis. The most productive clone DN2 (Populus deltoides × P. nigra) stored less (83 Mg ha−1) 0 60 than mid-productive 1079 jackii (P. balsamifera deltoides)) 915005 maximowiczii balsamifera) (95 96 ha−1 respectively), while least 747210 trichocarpa) also had lower stock (85 compared other clones, but not significantly. There was no stocks total increased by 6 % when sampling closer tree stems. difference mostly observed suggesting significant effect roots on storage. Soil C/N ratios significantly 0–20 depths differences OM decomposition clones. be trade-off litter rate increase
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ژورنال
عنوان ژورنال: Forest Ecology and Management
سال: 2023
ISSN: ['0378-1127', '1872-7042']
DOI: https://doi.org/10.1016/j.foreco.2023.120884