Biochar Addition to a Mediterranean Agroecosystem: Short-Term Divergent Priming Effects
The goal of this study was to evaluate biochar’s resistance to microbial decomposition and its impact on native soil organic matter (SOM) decomposition. Conducted in a vineyard with a sandy loam Mediterranean soil with neutral pH and low organic carbon content, the experiment involved the applicatio...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-02-01
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| Series: | Agriculture |
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| Online Access: | https://www.mdpi.com/2077-0472/14/2/242 |
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| author | Irene Raya-Moreno Rosa Cañizares Xavier Domene Vicenç Carabassa Josep Maria Alcañiz |
| author_facet | Irene Raya-Moreno Rosa Cañizares Xavier Domene Vicenç Carabassa Josep Maria Alcañiz |
| author_sort | Irene Raya-Moreno |
| collection | DOAJ |
| description | The goal of this study was to evaluate biochar’s resistance to microbial decomposition and its impact on native soil organic matter (SOM) decomposition. Conducted in a vineyard with a sandy loam Mediterranean soil with neutral pH and low organic carbon content, the experiment involved the application of 6.5 g biochar kg<sup>−1</sup> derived from pine (PB) and corn cob (ZB). The monitoring period spanned two years, with soil samples collected at short- and medium-term timepoints (2 and 26 months post-application) and incubated in the lab for an additional 250 days. Soil respiration, the CO<sub>2</sub>-C isotopic signature, and dissolved organic carbon (DOC<sub>hw</sub>) were assessed to identify potential priming effects (PE) and evaluate their persistence over two years. In the short term, biochar-induced priming effects were feedstock and pyrolysis temperature dependent, exhibiting negative priming in high-temperature wood biochar and positive priming in low-temperature grass biochar. The mechanism behind short-term positive priming was attributed to the higher labile organic carbon (OC) content in ZB compared to PB. In the medium term, initial strong priming effects shifted to slightly negative priming effects in both biochars, indicating the depletion of labile carbon fractions and the emergence of physical protection processes that mitigated priming. |
| first_indexed | 2024-03-07T22:46:37Z |
| format | Article |
| id | doaj.art-6ae305dce2ce4f6580455554178c1041 |
| institution | Directory Open Access Journal |
| issn | 2077-0472 |
| language | English |
| last_indexed | 2024-03-07T22:46:37Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
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| series | Agriculture |
| spelling | doaj.art-6ae305dce2ce4f6580455554178c10412024-02-23T15:03:42ZengMDPI AGAgriculture2077-04722024-02-0114224210.3390/agriculture14020242Biochar Addition to a Mediterranean Agroecosystem: Short-Term Divergent Priming EffectsIrene Raya-Moreno0Rosa Cañizares1Xavier Domene2Vicenç Carabassa3Josep Maria Alcañiz4CREAF, E08193 Bellaterra (Cerdanyola del Vallès), Catalonia, SpainCREAF, E08193 Bellaterra (Cerdanyola del Vallès), Catalonia, SpainCREAF, E08193 Bellaterra (Cerdanyola del Vallès), Catalonia, SpainCREAF, E08193 Bellaterra (Cerdanyola del Vallès), Catalonia, SpainCREAF, E08193 Bellaterra (Cerdanyola del Vallès), Catalonia, SpainThe goal of this study was to evaluate biochar’s resistance to microbial decomposition and its impact on native soil organic matter (SOM) decomposition. Conducted in a vineyard with a sandy loam Mediterranean soil with neutral pH and low organic carbon content, the experiment involved the application of 6.5 g biochar kg<sup>−1</sup> derived from pine (PB) and corn cob (ZB). The monitoring period spanned two years, with soil samples collected at short- and medium-term timepoints (2 and 26 months post-application) and incubated in the lab for an additional 250 days. Soil respiration, the CO<sub>2</sub>-C isotopic signature, and dissolved organic carbon (DOC<sub>hw</sub>) were assessed to identify potential priming effects (PE) and evaluate their persistence over two years. In the short term, biochar-induced priming effects were feedstock and pyrolysis temperature dependent, exhibiting negative priming in high-temperature wood biochar and positive priming in low-temperature grass biochar. The mechanism behind short-term positive priming was attributed to the higher labile organic carbon (OC) content in ZB compared to PB. In the medium term, initial strong priming effects shifted to slightly negative priming effects in both biochars, indicating the depletion of labile carbon fractions and the emergence of physical protection processes that mitigated priming.https://www.mdpi.com/2077-0472/14/2/242biocharfield studySOC mineralizationsoil incubationsoil respirationstable carbon isotopes |
| spellingShingle | Irene Raya-Moreno Rosa Cañizares Xavier Domene Vicenç Carabassa Josep Maria Alcañiz Biochar Addition to a Mediterranean Agroecosystem: Short-Term Divergent Priming Effects Agriculture biochar field study SOC mineralization soil incubation soil respiration stable carbon isotopes |
| title | Biochar Addition to a Mediterranean Agroecosystem: Short-Term Divergent Priming Effects |
| title_full | Biochar Addition to a Mediterranean Agroecosystem: Short-Term Divergent Priming Effects |
| title_fullStr | Biochar Addition to a Mediterranean Agroecosystem: Short-Term Divergent Priming Effects |
| title_full_unstemmed | Biochar Addition to a Mediterranean Agroecosystem: Short-Term Divergent Priming Effects |
| title_short | Biochar Addition to a Mediterranean Agroecosystem: Short-Term Divergent Priming Effects |
| title_sort | biochar addition to a mediterranean agroecosystem short term divergent priming effects |
| topic | biochar field study SOC mineralization soil incubation soil respiration stable carbon isotopes |
| url | https://www.mdpi.com/2077-0472/14/2/242 |
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