Carbon, nitrogen and the natural abundance of 13C and 15N in macro and microaggregates

This study aimed to measure the concentrations of carbon (C), nitrogen (N) and the natural abundance of 13C and 15N in macro and microaggregates under systems of land use. We sampled the 0-5 and 5-10 cm layers in no-tillage system (NTS), conventional tillage system (CTS), secondary forest and pastur...

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Autores principales:	Arcângelo,Loss, Gervasio Pereira,Marcos, Mendes Costa,Elias, Beutler,Sidinei Julio
Lenguaje:	English
Publicado:	Universidad de Tarapacá. Facultad de Ciencias Agronómicas 2014
Materias:	aggregate classes isotope composition no-tillage system conventional tillage system
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292014000400003
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spelling	oai:scielo:S0718-342920140004000032015-01-30Carbon, nitrogen and the natural abundance of 13C and 15N in macro and microaggregatesArcângelo,LossGervasio Pereira,MarcosMendes Costa,EliasBeutler,Sidinei Julio aggregate classes isotope composition no-tillage system conventional tillage system This study aimed to measure the concentrations of carbon (C), nitrogen (N) and the natural abundance of 13C and 15N in macro and microaggregates under systems of land use. We sampled the 0-5 and 5-10 cm layers in no-tillage system (NTS), conventional tillage system (CTS), secondary forest and pasture in southern Brazil. The largest variations of C and N concentrations were found for the 8-2 mm aggregate class, with the sequence pasture > forest = NTS > CTS, compared to the 0.25-0.105 mm class. The most negative δ13C values were found in the microaggregates and the least negative were found in the macroaggregates. Plowing and harrowing in the CTS cause the fracturing of soil aggregates, accelerating the mineralization reactions of soil organic matter (SOM) and discouraging the occlusion of SOM in the aggregates, resulting in higher δ15N values compared to the other systems evaluated. The larger variation in C and N content for the 8-2 mm class and smaller variation in the 0.25-0.150 mm class indicate that there is higher and lower sensitivity to the management system adopted in these areas and lesser and greater protection of the C and N by these aggregate classes, respectively.info:eu-repo/semantics/openAccessUniversidad de Tarapacá. Facultad de Ciencias AgronómicasIdesia (Arica) v.32 n.4 20142014-11-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292014000400003en10.4067/S0718-34292014000400003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	aggregate classes isotope composition no-tillage system conventional tillage system
spellingShingle	aggregate classes isotope composition no-tillage system conventional tillage system Arcângelo,Loss Gervasio Pereira,Marcos Mendes Costa,Elias Beutler,Sidinei Julio Carbon, nitrogen and the natural abundance of 13C and 15N in macro and microaggregates
description	This study aimed to measure the concentrations of carbon (C), nitrogen (N) and the natural abundance of 13C and 15N in macro and microaggregates under systems of land use. We sampled the 0-5 and 5-10 cm layers in no-tillage system (NTS), conventional tillage system (CTS), secondary forest and pasture in southern Brazil. The largest variations of C and N concentrations were found for the 8-2 mm aggregate class, with the sequence pasture > forest = NTS > CTS, compared to the 0.25-0.105 mm class. The most negative δ13C values were found in the microaggregates and the least negative were found in the macroaggregates. Plowing and harrowing in the CTS cause the fracturing of soil aggregates, accelerating the mineralization reactions of soil organic matter (SOM) and discouraging the occlusion of SOM in the aggregates, resulting in higher δ15N values compared to the other systems evaluated. The larger variation in C and N content for the 8-2 mm class and smaller variation in the 0.25-0.150 mm class indicate that there is higher and lower sensitivity to the management system adopted in these areas and lesser and greater protection of the C and N by these aggregate classes, respectively.
author	Arcângelo,Loss Gervasio Pereira,Marcos Mendes Costa,Elias Beutler,Sidinei Julio
author_facet	Arcângelo,Loss Gervasio Pereira,Marcos Mendes Costa,Elias Beutler,Sidinei Julio
author_sort	Arcângelo,Loss
title	Carbon, nitrogen and the natural abundance of 13C and 15N in macro and microaggregates
title_short	Carbon, nitrogen and the natural abundance of 13C and 15N in macro and microaggregates
title_full	Carbon, nitrogen and the natural abundance of 13C and 15N in macro and microaggregates
title_fullStr	Carbon, nitrogen and the natural abundance of 13C and 15N in macro and microaggregates
title_full_unstemmed	Carbon, nitrogen and the natural abundance of 13C and 15N in macro and microaggregates
title_sort	carbon, nitrogen and the natural abundance of 13c and 15n in macro and microaggregates
publisher	Universidad de Tarapacá. Facultad de Ciencias Agronómicas
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292014000400003
work_keys_str_mv	AT arcangeloloss carbonnitrogenandthenaturalabundanceof13cand15ninmacroandmicroaggregates AT gervasiopereiramarcos carbonnitrogenandthenaturalabundanceof13cand15ninmacroandmicroaggregates AT mendescostaelias carbonnitrogenandthenaturalabundanceof13cand15ninmacroandmicroaggregates AT beutlersidineijulio carbonnitrogenandthenaturalabundanceof13cand15ninmacroandmicroaggregates
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Carbon, nitrogen and the natural abundance of 13C and 15N in macro and microaggregates

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