Autor: |
Zhiwei Liu, Wei Zhang, Ruiling Ma, Shixian Li, Kaiyue Song, Jufeng Zheng, Yan Wang, Rongjun Bian, Xuhui Zhang, Genxing Pan |
Jazyk: |
angličtina |
Rok vydání: |
2023 |
Předmět: |
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Zdroj: |
Communications Earth & Environment, Vol 4, Iss 1, Pp 1-13 (2023) |
Druh dokumentu: |
article |
ISSN: |
2662-4435 |
DOI: |
10.1038/s43247-023-01155-z |
Popis: |
Abstract Soil amendment with biochar is being promoted as a promising strategy for carbon (C) stabilization and accrual, which are key to climate change mitigation. However, it remains elusive on how biochar addition influences nonbiochar C in soils and its mechanisms, especially in the presence of plants. Here we conducted a 365-day soil microcosm experiment with and without adding 13C-labeled biochar into topsoil to quantify changes in nonbiochar C in the topsoil and subsoil in the presence or absence of rice plants and to determine the mechanisms by which biochar controls nonbiochar C accrual in the soil profile. The nonbiochar C content of topsoil was not affected by biochar addition in the absence of rice plants, but was significantly increased by 4.5% in the presence of rice plants, which could result from increases in the soil macroaggregate fraction, iron (Fe)-bound nonbiochar organic C content, and fungal biomass collectively. However, biochar amendment had no effect on the content of nonbiochar organic C in the subsoil. Overall, biochar-plant interactions drive more nonbiochar C sequestration in the topsoil, and the changes of nonbiochar C in planted soils following biochar addition should be quantified to better assess the soil C sequestration potential in agricultural lands. |
Databáze: |
Directory of Open Access Journals |
Externí odkaz: |
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