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SAGRILO, E.; JEFFERY, S.; HOFFLAND, E.; KUYPER, T. W.. |
Soil amendment with pyrogenic organic matter (PyOM), also named biochar, is claimed to sequester carbon (C). However, possible interactions between PyOM and native soil organic carbon (SOC) may accelerate the loss of SOC, thus reducing PyOM?s C sequestration potential. We combined the results of 46 studies in a meta-analysis to investigate changes in CO2 emission of PyOM-amended soils and to identify the causes of these changes and the possible factors involved. Our results showed a statistically significant increase of 28% in CO2 emission from PyOM-amended soils. When grouped by PyOM C (PyC):SOC ratios, the group of studies with a ratio >2 showed a significant increase in CO2 emissions, but those with a ratio <2 showed no significant effect of PyOM... |
Tipo: Separatas |
Palavras-chave: Sequestro de carbono; Recalcitrância; Priming; Additive effects; Decomposition; Pyrogenic organic matter; Recalcitrance.; Matéria orgânica; Decomposição; Carbon sequestration.. |
Ano: 2015 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1030096 |
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SOUZA, C. R. de; AZEVEDO, C. P. de; ROSSI, L. M. B.; SILVA, K. E. da; SANTOS, J. dos; HIGUCHI, N.. |
Este trabalho analisou dados de três inventários florestais realizados na área da Floresta Experimental, pertencente à Embrapa Amazônia Ocidental e localizada no km 54 da BR-174, em Manaus/AM. O objetivo foi estudar a dinâmica da floresta - taxas de incremento, recrutamento e mortalidade - além do estoque de carbono, em uma área de floresta primária, sem qualquer tipo de intervenção. |
Tipo: Artigo de periódico |
Palavras-chave: Recrutamento; Incrementos; Sequestro de carbono; Recruitment mortality increments.; Mortalidade.; Amazonia; Carbon sequestration.. |
Ano: 2012 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/933014 |
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ALHO, C. F. B. V.; CROSS, A.; SOHI, S.; RODRIGUES, R. C.; NOVOTNY, E. H.; MAIA, C. M. B. de F.; LELIS, R. C. C.. |
Although biochar is often regarded lized into carbon dioxide. However, it is unclear how much of this material is rapidly oxidized, that is, how much remain in the soil for NQPIGTRGTKQFU'ƑQTVUJCXGDGGPWPFGTVCMGP to develop methodologies to quantify the stable fraction present in biochar, quickly, easily reproducible, and that somehow represents TGCN?GNFEQPFKVKQPU6JGTGHQTGVJGCKOQHVJKU UVWF[YCUVQGXCNWCVGVJGGƑGEVQHFKƑGTGPV R[TQN[UKU?PCNVGORGTCVWTGUQPVJGUVCDKNKV[QH biochar produced from Eucalyptus dunnii wood by analyzing biochar samples before and after a thermo-chemical oxidation using 13 C NMR spec- troscopy. Stable-C fraction increased as higher R[TQN[UKU?PCNVGORGTCVWTGYCU6JGTOQEJGOical oxidation was responsible for removing... |
Tipo: Separatas |
Palavras-chave: Sta- bility; Thermo-chemical oxidation; Functionalizatio n.; Biochar; Carbon sequestration.. |
Ano: 2013 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/979469 |
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