Pore architecture and particulate organic matter in soils under monoculture switchgrass and restored prairie in contrasting topography

Abstract Bioenergy cropping systems can substantially contribute to climate change mitigation. However, limited information is available on how they affect soil characteristics, including pores and particulate organic matter (POM), both essential components of the soil C cycle. The objective of this...

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Autores principales:	Archana Juyal, Andrey Guber, Maxwell Oerther, Michelle Quigley, Alexandra Kravchenko
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/818d2b7e79614429b8438539532ccb3f
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spelling	oai:doaj.org-article:818d2b7e79614429b8438539532ccb3f2021-11-14T12:20:29ZPore architecture and particulate organic matter in soils under monoculture switchgrass and restored prairie in contrasting topography10.1038/s41598-021-01533-72045-2322https://doaj.org/article/818d2b7e79614429b8438539532ccb3f2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01533-7https://doaj.org/toc/2045-2322Abstract Bioenergy cropping systems can substantially contribute to climate change mitigation. However, limited information is available on how they affect soil characteristics, including pores and particulate organic matter (POM), both essential components of the soil C cycle. The objective of this study was to determine effects of bioenergy systems and field topography on soil pore characteristics, POM, and POM decomposition under new plant growth. We collected intact soil cores from two systems: monoculture switchgrass (Panicum virgatum L.) and native prairie, at two contrasting topographical positions (depressions and slopes), planting half of the cores with switchgrass. Pore and POM characteristics were obtained using X-ray computed micro-tomography (μCT) (18.2 µm resolution) before and after new switchgrass growth. Diverse prairie vegetation led to higher soil C than switchgrass, with concomitantly higher volumes of 30–90 μm radius pores and greater solid-pore interface. Yet, that effect was present only in the coarse-textured soils on slopes and coincided with higher root biomass of prairie vegetation. Surprisingly, new switchgrass growth did not intensify decomposition of POM, but even somewhat decreased it in monoculture switchgrass as compared to non-planted controls. Our results suggest that topography can play a substantial role in regulating factors driving C sequestration in bioenergy systems.Archana JuyalAndrey GuberMaxwell OertherMichelle QuigleyAlexandra KravchenkoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Archana Juyal Andrey Guber Maxwell Oerther Michelle Quigley Alexandra Kravchenko Pore architecture and particulate organic matter in soils under monoculture switchgrass and restored prairie in contrasting topography
description	Abstract Bioenergy cropping systems can substantially contribute to climate change mitigation. However, limited information is available on how they affect soil characteristics, including pores and particulate organic matter (POM), both essential components of the soil C cycle. The objective of this study was to determine effects of bioenergy systems and field topography on soil pore characteristics, POM, and POM decomposition under new plant growth. We collected intact soil cores from two systems: monoculture switchgrass (Panicum virgatum L.) and native prairie, at two contrasting topographical positions (depressions and slopes), planting half of the cores with switchgrass. Pore and POM characteristics were obtained using X-ray computed micro-tomography (μCT) (18.2 µm resolution) before and after new switchgrass growth. Diverse prairie vegetation led to higher soil C than switchgrass, with concomitantly higher volumes of 30–90 μm radius pores and greater solid-pore interface. Yet, that effect was present only in the coarse-textured soils on slopes and coincided with higher root biomass of prairie vegetation. Surprisingly, new switchgrass growth did not intensify decomposition of POM, but even somewhat decreased it in monoculture switchgrass as compared to non-planted controls. Our results suggest that topography can play a substantial role in regulating factors driving C sequestration in bioenergy systems.
format	article
author	Archana Juyal Andrey Guber Maxwell Oerther Michelle Quigley Alexandra Kravchenko
author_facet	Archana Juyal Andrey Guber Maxwell Oerther Michelle Quigley Alexandra Kravchenko
author_sort	Archana Juyal
title	Pore architecture and particulate organic matter in soils under monoculture switchgrass and restored prairie in contrasting topography
title_short	Pore architecture and particulate organic matter in soils under monoculture switchgrass and restored prairie in contrasting topography
title_full	Pore architecture and particulate organic matter in soils under monoculture switchgrass and restored prairie in contrasting topography
title_fullStr	Pore architecture and particulate organic matter in soils under monoculture switchgrass and restored prairie in contrasting topography
title_full_unstemmed	Pore architecture and particulate organic matter in soils under monoculture switchgrass and restored prairie in contrasting topography
title_sort	pore architecture and particulate organic matter in soils under monoculture switchgrass and restored prairie in contrasting topography
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/818d2b7e79614429b8438539532ccb3f
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Pore architecture and particulate organic matter in soils under monoculture switchgrass and restored prairie in contrasting topography

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