Accumulation des stocks de carbone dans les sols sous des cultures bioénergétiques de Populus spp., Salix spp. et Panicum Virgatum
Globally, soils contain about 2000 Gt of carbon (C). Over the past centuries, however, land use has contributed to the release of about 140 Gt of C to the atmosphere. Nonetheless, the establishment of crops on marginal lands could reduce atmospheric C by accumulating it in soils. This study aimed to...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | fra |
| Published: |
Éditions en environnement VertigO
2014-09-01
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| Series: | VertigO |
| Subjects: | |
| Online Access: | https://journals.openedition.org/vertigo/15076 |
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| Summary: | Globally, soils contain about 2000 Gt of carbon (C). Over the past centuries, however, land use has contributed to the release of about 140 Gt of C to the atmosphere. Nonetheless, the establishment of crops on marginal lands could reduce atmospheric C by accumulating it in soils. This study aimed to identify the effects of soil texture, land use history and time following cultivation on soil C accumulation since the establishment of two woody species (Populus spp. , and Salix spp. ) and one herbaceous species (Panic virgatum). Overall, over relatively short periods of time (less than 20 years), our results indicate that these cultures accumulate a considerable amount of soil organic carbon (SOC) compared to previous land uses. Under woody species and P. virgatum, sites with clay content >20 % had SOC stocks 10-20 % higher than control sites, whereas this difference was approximately 5 % for crops with soil clay content |
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| ISSN: | 1492-8442 |