Fast spectrophotometric method as alternative for cuo oxidation to assess lignin in soils with different tree cover

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dc.identifier.uri Danise, Tiziana Innangi, Michele Curcio, Elena Fioretto, Antonietta Guggenberger, Georg 2021-03-30T06:51:18Z 2021-03-30T06:51:18Z 2020
dc.identifier.citation Danise, T.; Innangi, M.; Curcio, E.; Fioretto, A.; Guggenberger, G.: Fast spectrophotometric method as alternative for cuo oxidation to assess lignin in soils with different tree cover. In: Forests 11 (2020), Nr. 12, 1262. DOI:
dc.description.abstract Given the ongoing climate change, estimating the amount of less degradable plant compounds that can be stored in the soil, such as lignin, is a topic of primary importance. There are few methods applicable to soils for the determination of lignin, such as the copper oxide (CuO) oxidation method (CuOL). Acetyl bromide spectrophotometric lignin (ABSL) could be a valid alternative providing information that is less detailed compared to CuOL, but it offers data on the bulk amount of lignin and may offer a valid, fast, and cheap alternative to the CuO method. The aim of this work was to compare ABSL with the CuO method on several soils receiving plant residues from different trees. Mineral soil samples from 0 to 10 cm depth were obtained from a former agricultural site in northern Italy (Brusciana, Tuscany), where different tree plantations were established 22 years ago. The plantations were white poplar and common walnut, which were also intercropped with other species such as hazelnut, Italian alder, and autumn olive. Soil samples under these plantations were also compared to soil under an adjacent agricultural field. In general, the amount of lignin in the afforested stands was approximately double than in the agricultural field as determined by either method. The two methods returned a largely different scale of values due to their different mechanisms of action. The acid-to-aldehyde ratio of syringyl structural units highlights that forest plantation provides a plant input material that is more slowly oxidatively degraded compared to arable soil. A linear mixed model proved that ABSL performed well in relation to CuOL, especially when considering the random variation in the model given by the plantation field design. In conclusion, ABSL can be considered a valid proxy of soil C pool derived from structural plant component, although further analyses are needed. © 2020 by the authors. Licensee MDPI, Basel, Switzerland. eng
dc.language.iso eng
dc.publisher Basel : Molecular Diversity Preservation International (MDPI)
dc.relation.ispartofseries Forests 11 (2020), Nr. 12
dc.rights CC BY 4.0 Unported
dc.subject ancillary species eng
dc.subject soil carbon pool eng
dc.subject soil VSC content eng
dc.subject spectrophotometric method eng
dc.subject trees impact eng
dc.subject.ddc 630 | Landwirtschaft, Veterinärmedizin ger
dc.subject.ddc 640 | Hauswirtschaft und Familienleben ger
dc.subject.ddc 690 | Hausbau, Bauhandwerk ger
dc.title Fast spectrophotometric method as alternative for cuo oxidation to assess lignin in soils with different tree cover
dc.type Article
dc.type Text
dc.relation.essn 1999-4907
dc.bibliographicCitation.issue 12
dc.bibliographicCitation.volume 11
dc.bibliographicCitation.firstPage 1262
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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