Acacia and Eucalyptus plantations modify the molecular composition of density organic matter fractions of subtropical native pasture soils

• Published in: Geoderma Vol. 441; p. 116745
• Main Authors: dos Anjos Leal, Otávio, Santana, Graciele Sarante, Knicker, Heike, González-Vila, Francisco J., González-Pérez, José A., Dick, Deborah Pinheiro
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.2024; Elsevier
• Subjects: Acacia; alkanes; aromatic compounds; biodegradability; biomarkers; Brazil; Cambisols; carbon; carbon nitrogen ratio; Density fractions; Eucalyptus; forest plantations; introduced species; lipids; mass spectrometry; Molecular proxies; n-alkanes; nitrogen; pastures; PCA; polysaccharides; Py-GC/MS; pyrolysis gas chromatography; soil organic matter; soil profiles; Brazil; Brazil; n-alkanes; Density fractions; Py-GC/MS; Molecular proxies; PCA

•Py-GC/MS confirmed stronger Eucalyptus litter recalcitrance compared to Acacia litter.•Eucalyptus modified more C and N stocks and less the chemistry of light SOM pools.•n-alkane molecular proxies in SOM pools sensitively responded to the exotic forests.•Acacia caused stronger chemical shifts in li...