CARBON AND NITROGEN STOCKS IN ORGANIC MATTER FRACTIONS IN ALFISOL UNDER EUCALYPTUS AND PASTURE

Detalhes bibliográficos
Autor(a) principal: Pegoraro, Rodinei Facco
Data de Publicação: 2011
Outros Autores: Silva, Ivo Ribeiro da, Novais, Roberto Ferreira de, Barros, Nairam Felix de, Fonseca, Sebastião, Dambroz, Carlos Silva
Tipo de documento: Artigo
Idioma: por
Título da fonte: Ciência Florestal (Online)
Texto Completo: https://periodicos.ufsm.br/cienciaflorestal/article/view/3230
Resumo: The cultivation of eucalyptus in areas of pasture has resulted in changes of C and N storage in soil, mainly due to the different characteristics of each plant and their biomass management; the largest stock of C and N can be found under eucalyptus, originating from the biomass at the soil surface layer and increasing the C/N in decomposition of plant residues. These differences may cause a decrease in the storage of C and N fractions in the chemical, physical and biological soil, both in the more labile, an the more recalcitrant fractions. This study aimed to evaluate the stocks of total organic carbon (TOC) and total N (TN), the stock of C and N in humic substances (fulvic acids, humic and humin), the light fraction (C-MOL and N-MOL) and the microbial biomass (C-BM and N-BM) in samples of collected from the layers 0-0.10, 0.10-0.20, 0.20-0.40, 0.40-0.60 and 0.60-1.00 m in depth, line (EL) and interline (EEL) from the soil under eucalyptus in the fourth rotation with six years of age, and from an area of cultivated pasture with Brachiaria (P). The total organic carbon stock and carbon in the light fraction in the first layers of soil (0.60 m) was higher in the interline of eucalyptus compared with that from the cultivated pasture and the line of eucalyptus, probably favored by harvest residue from the previous cycle of eucalyptus buried in the current interline. By determining the natural abundance of 13C in the 0-0.20m soil, it was found that 29% and 37% of carbon present in the soil organic matter (SOM) after 28 years of cultivation in the line and interline, respectively, was derived from eucalyptus (C3 plants), which corresponded to an average rate of cycling of SOM in this soil of 1.04% (line) and 1.32% (interline) per year. In the soil interline it was observed that the C-C3 from the eucalyptus increased the stock of soil organic C, even with the replacement of C-C4 from the pasture, after 28 years of eucalyptus cultivation. For nitrogen in humic substances, a similar stock was obtained for the soil of the interline of eucalyptus and that of the pasture, which was higher than that of the soil line of eucalyptus, up to 1 m deep. The soil of eucalyptus (EL and EEL) showed a stock of C and N in microbial biomass similar to that of cultivated pasture.
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spelling CARBON AND NITROGEN STOCKS IN ORGANIC MATTER FRACTIONS IN ALFISOL UNDER EUCALYPTUS AND PASTUREEstoques de carbono e nitrogênio nas frações da matéria orgânica em argissolo sob eucalipto e pastagemhumic substancesnatural abundance of 13Clight fractionmicrobial biomass.substâncias húmicasabundância natural de 13Cfração levebiomassa microbianaThe cultivation of eucalyptus in areas of pasture has resulted in changes of C and N storage in soil, mainly due to the different characteristics of each plant and their biomass management; the largest stock of C and N can be found under eucalyptus, originating from the biomass at the soil surface layer and increasing the C/N in decomposition of plant residues. These differences may cause a decrease in the storage of C and N fractions in the chemical, physical and biological soil, both in the more labile, an the more recalcitrant fractions. This study aimed to evaluate the stocks of total organic carbon (TOC) and total N (TN), the stock of C and N in humic substances (fulvic acids, humic and humin), the light fraction (C-MOL and N-MOL) and the microbial biomass (C-BM and N-BM) in samples of collected from the layers 0-0.10, 0.10-0.20, 0.20-0.40, 0.40-0.60 and 0.60-1.00 m in depth, line (EL) and interline (EEL) from the soil under eucalyptus in the fourth rotation with six years of age, and from an area of cultivated pasture with Brachiaria (P). The total organic carbon stock and carbon in the light fraction in the first layers of soil (0.60 m) was higher in the interline of eucalyptus compared with that from the cultivated pasture and the line of eucalyptus, probably favored by harvest residue from the previous cycle of eucalyptus buried in the current interline. By determining the natural abundance of 13C in the 0-0.20m soil, it was found that 29% and 37% of carbon present in the soil organic matter (SOM) after 28 years of cultivation in the line and interline, respectively, was derived from eucalyptus (C3 plants), which corresponded to an average rate of cycling of SOM in this soil of 1.04% (line) and 1.32% (interline) per year. In the soil interline it was observed that the C-C3 from the eucalyptus increased the stock of soil organic C, even with the replacement of C-C4 from the pasture, after 28 years of eucalyptus cultivation. For nitrogen in humic substances, a similar stock was obtained for the soil of the interline of eucalyptus and that of the pasture, which was higher than that of the soil line of eucalyptus, up to 1 m deep. The soil of eucalyptus (EL and EEL) showed a stock of C and N in microbial biomass similar to that of cultivated pasture.O cultivo de florestas plantadas de eucalipto em áreas de pastagem tem propiciado alterações no estoque de C e N no solo, em especial pelas diferentes características de cada planta e manejo dos resíduos vegetais; o eucalipto pode localizar maior estoque de C e N originário de resíduos da parte aérea na camada superficial do solo, e aumentar a relação C/N dos resíduos vegetais em decomposição. Tais diferenças podem causar redução no estoque de C e N nas frações químicas, físicas e biológicas do solo, tanto nas frações mais lábeis, quanto nas mais recalcitrantes. Este trabalho teve como objetivo avaliar os estoques de C orgânico total (COT) e N total (NT), estoque de C e N nas substâncias húmicas (ácidos fúlvicos, húmicos e húminas), fração leve (C-MOL e N-MOL) e biomassa microbiana (C-BM e N-BM) em amostras de solos coletadas nas camadas de 0-0,10, 0,10-0,20, 0,20-0,40, 0,40-0,60 e 0,60-1,00 m de profundidade, na linha (EL) e entrelinha (EEL) do solo sob cultivo de eucalipto na quarta rotação com seis anos de idade, e em área de pastagem cultivada com brachiaria (P). O estoque de carbono orgânico total e de carbono na fração leve do solo nas primeiras camadas do solo (até 0,60 m) foi superior na entrelinha do eucalipto em comparação àquele cultivado com pastagem e na linha de cultivo do eucalipto, possivelmente favorecido pela incorporação de resíduos da colheita do ciclo anterior de eucalipto na atual entrelinha. Por meio da determinação da abundância natural de 13C na camada de 0-0,20m de solo verificou-se que 29 e 37% do carbono presente na matéria orgânica do solo (MOS) após 28 anos de cultivo derivaram do eucalipto (planta C3), respectivamente, na linha e entrelinha, o que correspondeu à taxa de ciclagem média da MOS nesse solo de 1,04% (linha) e 1,32% (entrelinha) ao ano. No solo da entrelinha, observou-se que o C-C3 proveniente do eucalipto incrementou o estoque de C orgânico do solo, mesmo com a substituição do C-C4 proveniente da pastagem, após 28 anos de cultivo do eucalipto. Para o nitrogênio nas substâncias húmicas, verificou-se estoques semelhantes entre o solo da entrelinha do eucalipto e o de pastagem, e superior ao do solo da linha do eucalipto, até 1 m de profundidade. O solo de eucalipto (EL e EEL) teve estoques de C e N na biomassa microbiana semelhante àquele cultivado com pastagem.Universidade Federal de Santa Maria2011-06-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/323010.5902/198050983230Ciência Florestal; Vol. 21 No. 2 (2011); 261-273Ciência Florestal; v. 21 n. 2 (2011); 261-2731980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMporhttps://periodicos.ufsm.br/cienciaflorestal/article/view/3230/1873Pegoraro, Rodinei FaccoSilva, Ivo Ribeiro daNovais, Roberto Ferreira deBarros, Nairam Felix deFonseca, SebastiãoDambroz, Carlos Silvainfo:eu-repo/semantics/openAccess2017-05-03T19:14:03Zoai:ojs.pkp.sfu.ca:article/3230Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2017-05-03T19:14:03Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false
dc.title.none.fl_str_mv CARBON AND NITROGEN STOCKS IN ORGANIC MATTER FRACTIONS IN ALFISOL UNDER EUCALYPTUS AND PASTURE
Estoques de carbono e nitrogênio nas frações da matéria orgânica em argissolo sob eucalipto e pastagem
title CARBON AND NITROGEN STOCKS IN ORGANIC MATTER FRACTIONS IN ALFISOL UNDER EUCALYPTUS AND PASTURE
spellingShingle CARBON AND NITROGEN STOCKS IN ORGANIC MATTER FRACTIONS IN ALFISOL UNDER EUCALYPTUS AND PASTURE
Pegoraro, Rodinei Facco
humic substances
natural abundance of 13C
light fraction
microbial biomass.
substâncias húmicas
abundância natural de 13C
fração leve
biomassa microbiana
title_short CARBON AND NITROGEN STOCKS IN ORGANIC MATTER FRACTIONS IN ALFISOL UNDER EUCALYPTUS AND PASTURE
title_full CARBON AND NITROGEN STOCKS IN ORGANIC MATTER FRACTIONS IN ALFISOL UNDER EUCALYPTUS AND PASTURE
title_fullStr CARBON AND NITROGEN STOCKS IN ORGANIC MATTER FRACTIONS IN ALFISOL UNDER EUCALYPTUS AND PASTURE
title_full_unstemmed CARBON AND NITROGEN STOCKS IN ORGANIC MATTER FRACTIONS IN ALFISOL UNDER EUCALYPTUS AND PASTURE
title_sort CARBON AND NITROGEN STOCKS IN ORGANIC MATTER FRACTIONS IN ALFISOL UNDER EUCALYPTUS AND PASTURE
author Pegoraro, Rodinei Facco
author_facet Pegoraro, Rodinei Facco
Silva, Ivo Ribeiro da
Novais, Roberto Ferreira de
Barros, Nairam Felix de
Fonseca, Sebastião
Dambroz, Carlos Silva
author_role author
author2 Silva, Ivo Ribeiro da
Novais, Roberto Ferreira de
Barros, Nairam Felix de
Fonseca, Sebastião
Dambroz, Carlos Silva
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Pegoraro, Rodinei Facco
Silva, Ivo Ribeiro da
Novais, Roberto Ferreira de
Barros, Nairam Felix de
Fonseca, Sebastião
Dambroz, Carlos Silva
dc.subject.por.fl_str_mv humic substances
natural abundance of 13C
light fraction
microbial biomass.
substâncias húmicas
abundância natural de 13C
fração leve
biomassa microbiana
topic humic substances
natural abundance of 13C
light fraction
microbial biomass.
substâncias húmicas
abundância natural de 13C
fração leve
biomassa microbiana
description The cultivation of eucalyptus in areas of pasture has resulted in changes of C and N storage in soil, mainly due to the different characteristics of each plant and their biomass management; the largest stock of C and N can be found under eucalyptus, originating from the biomass at the soil surface layer and increasing the C/N in decomposition of plant residues. These differences may cause a decrease in the storage of C and N fractions in the chemical, physical and biological soil, both in the more labile, an the more recalcitrant fractions. This study aimed to evaluate the stocks of total organic carbon (TOC) and total N (TN), the stock of C and N in humic substances (fulvic acids, humic and humin), the light fraction (C-MOL and N-MOL) and the microbial biomass (C-BM and N-BM) in samples of collected from the layers 0-0.10, 0.10-0.20, 0.20-0.40, 0.40-0.60 and 0.60-1.00 m in depth, line (EL) and interline (EEL) from the soil under eucalyptus in the fourth rotation with six years of age, and from an area of cultivated pasture with Brachiaria (P). The total organic carbon stock and carbon in the light fraction in the first layers of soil (0.60 m) was higher in the interline of eucalyptus compared with that from the cultivated pasture and the line of eucalyptus, probably favored by harvest residue from the previous cycle of eucalyptus buried in the current interline. By determining the natural abundance of 13C in the 0-0.20m soil, it was found that 29% and 37% of carbon present in the soil organic matter (SOM) after 28 years of cultivation in the line and interline, respectively, was derived from eucalyptus (C3 plants), which corresponded to an average rate of cycling of SOM in this soil of 1.04% (line) and 1.32% (interline) per year. In the soil interline it was observed that the C-C3 from the eucalyptus increased the stock of soil organic C, even with the replacement of C-C4 from the pasture, after 28 years of eucalyptus cultivation. For nitrogen in humic substances, a similar stock was obtained for the soil of the interline of eucalyptus and that of the pasture, which was higher than that of the soil line of eucalyptus, up to 1 m deep. The soil of eucalyptus (EL and EEL) showed a stock of C and N in microbial biomass similar to that of cultivated pasture.
publishDate 2011
dc.date.none.fl_str_mv 2011-06-30
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://periodicos.ufsm.br/cienciaflorestal/article/view/3230
10.5902/198050983230
url https://periodicos.ufsm.br/cienciaflorestal/article/view/3230
identifier_str_mv 10.5902/198050983230
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://periodicos.ufsm.br/cienciaflorestal/article/view/3230/1873
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Santa Maria
publisher.none.fl_str_mv Universidade Federal de Santa Maria
dc.source.none.fl_str_mv Ciência Florestal; Vol. 21 No. 2 (2011); 261-273
Ciência Florestal; v. 21 n. 2 (2011); 261-273
1980-5098
0103-9954
reponame:Ciência Florestal (Online)
instname:Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
instname_str Universidade Federal de Santa Maria (UFSM)
instacron_str UFSM
institution UFSM
reponame_str Ciência Florestal (Online)
collection Ciência Florestal (Online)
repository.name.fl_str_mv Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)
repository.mail.fl_str_mv ||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br
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