Root decomposition in silvopastures is influenced by grazing, fertility, and grass species

Abstract Grass root production and decomposition is a major source of C entering soils, although rates are largely unknown based on edaphic and management factors. Therefore, study objectives were to evaluate four explanatory variables including forage species (native and nonnative), fertility (poul...

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Autores principales:	Amanda J. Ashworth, Taylor Adams, Tulsi Kharel, Dirk Philipp, Phillip Owens, Thomas Sauer
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	Agriculture S Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/36fff86562204584aa0e2c53b39124e7
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spelling	oai:doaj.org-article:36fff86562204584aa0e2c53b39124e72021-11-24T11:36:03ZRoot decomposition in silvopastures is influenced by grazing, fertility, and grass species2639-669610.1002/agg2.20190https://doaj.org/article/36fff86562204584aa0e2c53b39124e72021-01-01T00:00:00Zhttps://doi.org/10.1002/agg2.20190https://doaj.org/toc/2639-6696Abstract Grass root production and decomposition is a major source of C entering soils, although rates are largely unknown based on edaphic and management factors. Therefore, study objectives were to evaluate four explanatory variables including forage species (native and nonnative), fertility (poultry litter and a control), soil moisture (udic and aquic), and pasture management (grazed and an ungrazed control) in order to evaluate driving factors for root turnover and subsequent soil organic matter formation in silvopastoral systems using the root litter bag technique. Native grass root decomposition was accelerated relative to the nonnative forage based on root mass balance, as well as the exponential decay function, likely owing to greater five‐ and six‐C sugars and more digestible root tissues of native grasses. These physiochemical results suggest more favorable microbial food sources, which culminate in faster decomposition and greater microbially derived organic matter. Overall, there was greater root sloughing and subsequent soil organic matter formation potential with native grass species and poultry litter applications, with soil moisture affecting decomposition to a lesser extent. This study contributes to the understanding of complex interactions of grass species, soil moisture, nutrients, and grazing, which controls primary productivity, as well as nutrient cycling and C sequestration in silvopastures.Amanda J. AshworthTaylor AdamsTulsi KharelDirk PhilippPhillip OwensThomas SauerWileyarticleAgricultureSEnvironmental sciencesGE1-350ENAgrosystems, Geosciences & Environment, Vol 4, Iss 3, Pp n/a-n/a (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Agriculture S Environmental sciences GE1-350
spellingShingle	Agriculture S Environmental sciences GE1-350 Amanda J. Ashworth Taylor Adams Tulsi Kharel Dirk Philipp Phillip Owens Thomas Sauer Root decomposition in silvopastures is influenced by grazing, fertility, and grass species
description	Abstract Grass root production and decomposition is a major source of C entering soils, although rates are largely unknown based on edaphic and management factors. Therefore, study objectives were to evaluate four explanatory variables including forage species (native and nonnative), fertility (poultry litter and a control), soil moisture (udic and aquic), and pasture management (grazed and an ungrazed control) in order to evaluate driving factors for root turnover and subsequent soil organic matter formation in silvopastoral systems using the root litter bag technique. Native grass root decomposition was accelerated relative to the nonnative forage based on root mass balance, as well as the exponential decay function, likely owing to greater five‐ and six‐C sugars and more digestible root tissues of native grasses. These physiochemical results suggest more favorable microbial food sources, which culminate in faster decomposition and greater microbially derived organic matter. Overall, there was greater root sloughing and subsequent soil organic matter formation potential with native grass species and poultry litter applications, with soil moisture affecting decomposition to a lesser extent. This study contributes to the understanding of complex interactions of grass species, soil moisture, nutrients, and grazing, which controls primary productivity, as well as nutrient cycling and C sequestration in silvopastures.
format	article
author	Amanda J. Ashworth Taylor Adams Tulsi Kharel Dirk Philipp Phillip Owens Thomas Sauer
author_facet	Amanda J. Ashworth Taylor Adams Tulsi Kharel Dirk Philipp Phillip Owens Thomas Sauer
author_sort	Amanda J. Ashworth
title	Root decomposition in silvopastures is influenced by grazing, fertility, and grass species
title_short	Root decomposition in silvopastures is influenced by grazing, fertility, and grass species
title_full	Root decomposition in silvopastures is influenced by grazing, fertility, and grass species
title_fullStr	Root decomposition in silvopastures is influenced by grazing, fertility, and grass species
title_full_unstemmed	Root decomposition in silvopastures is influenced by grazing, fertility, and grass species
title_sort	root decomposition in silvopastures is influenced by grazing, fertility, and grass species
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/36fff86562204584aa0e2c53b39124e7
work_keys_str_mv	AT amandajashworth rootdecompositioninsilvopasturesisinfluencedbygrazingfertilityandgrassspecies AT tayloradams rootdecompositioninsilvopasturesisinfluencedbygrazingfertilityandgrassspecies AT tulsikharel rootdecompositioninsilvopasturesisinfluencedbygrazingfertilityandgrassspecies AT dirkphilipp rootdecompositioninsilvopasturesisinfluencedbygrazingfertilityandgrassspecies AT phillipowens rootdecompositioninsilvopasturesisinfluencedbygrazingfertilityandgrassspecies AT thomassauer rootdecompositioninsilvopasturesisinfluencedbygrazingfertilityandgrassspecies
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Root decomposition in silvopastures is influenced by grazing, fertility, and grass species

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