Impact of common reed and complex organic matter on the chemistry of acid sulfate soils

Abstract: Acid sulfate soils (ASS) are naturally occurring soils or sediments formed under reducing conditions that either contain sulfuric acid or have the potentail to form it, in an amount that can have adverse imapcts on the environment. The negative impacts of ASS are associated with the releas...

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Autores principales:	Michael,Patrick S., Reid,Robert J.
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2018
Materias:	Acid sulfate soils organic matter Phragmites pH redox potential sulfate content
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162018000200542
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spelling	oai:scielo:S0718-951620180002005422018-11-21Impact of common reed and complex organic matter on the chemistry of acid sulfate soilsMichael,Patrick S.Reid,Robert J. Acid sulfate soils organic matter Phragmites pH redox potential sulfate content Abstract: Acid sulfate soils (ASS) are naturally occurring soils or sediments formed under reducing conditions that either contain sulfuric acid or have the potentail to form it, in an amount that can have adverse imapcts on the environment. The negative impacts of ASS are associated with the release of acidity produced and the release of toxic metals and metaloids from solubulised soil matricies into the environment. It has been shown recently that addition to ASS of dead plant material as organic matter creates microenvironments for soil microbes to ameliorate sulfuric soil and prevent sulfidic soil oxidation. Initial breakdown of the organic matter results in an oxygen demand that generates anaerobic conditions conducive to the reduction of sulfate to sulfides by sulfate reducing bacteria using the residual organic material as a carbon source and causing the pH to rise. There is also evidence that live plants increase acidification, potentially by aerating the soil. In nature, plants shed dead material as they grow, so that both live and dead organic matter co-exist. It is not known what happens to ASS chemistry, particularly pH, under such natural conditions. In this study, Phragmites australis was used to examine the combined effect of growing plants and incorporated organic matter on ASS chemistry (pH, redox potential and sulfate content) under aerobic and anaerobic conditions. In almost all cases, live plants enhanced sulfuric soil acidity and sulfidic soil oxidation. The mechanism for these changes on ASS chemistry appears to be the facilitation of oxygen penetration into the soil via aerenchymatous tissues in the plant roots.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.18 n.2 20182018-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162018000200542en10.4067/S0718-95162018005001603
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Acid sulfate soils organic matter Phragmites pH redox potential sulfate content
spellingShingle	Acid sulfate soils organic matter Phragmites pH redox potential sulfate content Michael,Patrick S. Reid,Robert J. Impact of common reed and complex organic matter on the chemistry of acid sulfate soils
description	Abstract: Acid sulfate soils (ASS) are naturally occurring soils or sediments formed under reducing conditions that either contain sulfuric acid or have the potentail to form it, in an amount that can have adverse imapcts on the environment. The negative impacts of ASS are associated with the release of acidity produced and the release of toxic metals and metaloids from solubulised soil matricies into the environment. It has been shown recently that addition to ASS of dead plant material as organic matter creates microenvironments for soil microbes to ameliorate sulfuric soil and prevent sulfidic soil oxidation. Initial breakdown of the organic matter results in an oxygen demand that generates anaerobic conditions conducive to the reduction of sulfate to sulfides by sulfate reducing bacteria using the residual organic material as a carbon source and causing the pH to rise. There is also evidence that live plants increase acidification, potentially by aerating the soil. In nature, plants shed dead material as they grow, so that both live and dead organic matter co-exist. It is not known what happens to ASS chemistry, particularly pH, under such natural conditions. In this study, Phragmites australis was used to examine the combined effect of growing plants and incorporated organic matter on ASS chemistry (pH, redox potential and sulfate content) under aerobic and anaerobic conditions. In almost all cases, live plants enhanced sulfuric soil acidity and sulfidic soil oxidation. The mechanism for these changes on ASS chemistry appears to be the facilitation of oxygen penetration into the soil via aerenchymatous tissues in the plant roots.
author	Michael,Patrick S. Reid,Robert J.
author_facet	Michael,Patrick S. Reid,Robert J.
author_sort	Michael,Patrick S.
title	Impact of common reed and complex organic matter on the chemistry of acid sulfate soils
title_short	Impact of common reed and complex organic matter on the chemistry of acid sulfate soils
title_full	Impact of common reed and complex organic matter on the chemistry of acid sulfate soils
title_fullStr	Impact of common reed and complex organic matter on the chemistry of acid sulfate soils
title_full_unstemmed	Impact of common reed and complex organic matter on the chemistry of acid sulfate soils
title_sort	impact of common reed and complex organic matter on the chemistry of acid sulfate soils
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162018000200542
work_keys_str_mv	AT michaelpatricks impactofcommonreedandcomplexorganicmatteronthechemistryofacidsulfatesoils AT reidrobertj impactofcommonreedandcomplexorganicmatteronthechemistryofacidsulfatesoils
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Impact of common reed and complex organic matter on the chemistry of acid sulfate soils

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