Influence of summer crop residues on 15N present in organic matter fractions under two lowland soils
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Ciência Rural |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000400251 |
Resumo: | ABSTRACT: The state of Rio Grande do Sul has about 20% of the total area as lowland soils, suitable for flooded rice (Oryza sativa). In order to mitigate damage caused by rice monoculture, new crops such as sorghum (Sorghum bicolor) and soybean (Glycine max) have been cultivated in these areas. With different qualities of crop residues, it is expected a change in soil organic matter (SOM) dynamics and consequently, nitrogen (N) availability. The objective of this study was to evaluate the influence of rice, soybean and sorghum crop residues on the N present in physical fractions of SOM of two lowland soils, using labeled 15N technique, under incubation for 180 days in aerobic condition and more 180 days in anaerobic condition. At 30, 180 and 360 days of incubation the remaining N of the plant residues and N destination from the residues in both soils were quantified in the physical fractions of SOM >250 μm, 250-53 μm and <53 μm. The soil with higher amount of clay+silt received a larger quantity of 15N from residues, while flooding of the soil after 180 days caused a loss of N added to the soil by the soybean and sorghum residues. In general, larger amounts of 15N were reported in the fraction <53 μm, associated with clay minerals, throughout the incubation period. These N losses should be considered in N fertilization for the following crops in rotation with flooded rice. |
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Influence of summer crop residues on 15N present in organic matter fractions under two lowland soilsPhysical fractionationpaddy soils15N isotopeABSTRACT: The state of Rio Grande do Sul has about 20% of the total area as lowland soils, suitable for flooded rice (Oryza sativa). In order to mitigate damage caused by rice monoculture, new crops such as sorghum (Sorghum bicolor) and soybean (Glycine max) have been cultivated in these areas. With different qualities of crop residues, it is expected a change in soil organic matter (SOM) dynamics and consequently, nitrogen (N) availability. The objective of this study was to evaluate the influence of rice, soybean and sorghum crop residues on the N present in physical fractions of SOM of two lowland soils, using labeled 15N technique, under incubation for 180 days in aerobic condition and more 180 days in anaerobic condition. At 30, 180 and 360 days of incubation the remaining N of the plant residues and N destination from the residues in both soils were quantified in the physical fractions of SOM >250 μm, 250-53 μm and <53 μm. The soil with higher amount of clay+silt received a larger quantity of 15N from residues, while flooding of the soil after 180 days caused a loss of N added to the soil by the soybean and sorghum residues. In general, larger amounts of 15N were reported in the fraction <53 μm, associated with clay minerals, throughout the incubation period. These N losses should be considered in N fertilization for the following crops in rotation with flooded rice.Universidade Federal de Santa Maria2019-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000400251Ciência Rural v.49 n.4 2019reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/0103-8478cr20180747info:eu-repo/semantics/openAccessPollet,Carolina SchultzSilva,Leandro Souza daChaves,BrunoRosa Neto,LethíciaDossin,Mariana FernedaGiacomini,Sandro JoséCargnelutti Filho,Albertoeng2019-03-29T00:00:00ZRevista |
dc.title.none.fl_str_mv |
Influence of summer crop residues on 15N present in organic matter fractions under two lowland soils |
title |
Influence of summer crop residues on 15N present in organic matter fractions under two lowland soils |
spellingShingle |
Influence of summer crop residues on 15N present in organic matter fractions under two lowland soils Pollet,Carolina Schultz Physical fractionation paddy soils 15N isotope |
title_short |
Influence of summer crop residues on 15N present in organic matter fractions under two lowland soils |
title_full |
Influence of summer crop residues on 15N present in organic matter fractions under two lowland soils |
title_fullStr |
Influence of summer crop residues on 15N present in organic matter fractions under two lowland soils |
title_full_unstemmed |
Influence of summer crop residues on 15N present in organic matter fractions under two lowland soils |
title_sort |
Influence of summer crop residues on 15N present in organic matter fractions under two lowland soils |
author |
Pollet,Carolina Schultz |
author_facet |
Pollet,Carolina Schultz Silva,Leandro Souza da Chaves,Bruno Rosa Neto,Lethícia Dossin,Mariana Ferneda Giacomini,Sandro José Cargnelutti Filho,Alberto |
author_role |
author |
author2 |
Silva,Leandro Souza da Chaves,Bruno Rosa Neto,Lethícia Dossin,Mariana Ferneda Giacomini,Sandro José Cargnelutti Filho,Alberto |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Pollet,Carolina Schultz Silva,Leandro Souza da Chaves,Bruno Rosa Neto,Lethícia Dossin,Mariana Ferneda Giacomini,Sandro José Cargnelutti Filho,Alberto |
dc.subject.por.fl_str_mv |
Physical fractionation paddy soils 15N isotope |
topic |
Physical fractionation paddy soils 15N isotope |
description |
ABSTRACT: The state of Rio Grande do Sul has about 20% of the total area as lowland soils, suitable for flooded rice (Oryza sativa). In order to mitigate damage caused by rice monoculture, new crops such as sorghum (Sorghum bicolor) and soybean (Glycine max) have been cultivated in these areas. With different qualities of crop residues, it is expected a change in soil organic matter (SOM) dynamics and consequently, nitrogen (N) availability. The objective of this study was to evaluate the influence of rice, soybean and sorghum crop residues on the N present in physical fractions of SOM of two lowland soils, using labeled 15N technique, under incubation for 180 days in aerobic condition and more 180 days in anaerobic condition. At 30, 180 and 360 days of incubation the remaining N of the plant residues and N destination from the residues in both soils were quantified in the physical fractions of SOM >250 μm, 250-53 μm and <53 μm. The soil with higher amount of clay+silt received a larger quantity of 15N from residues, while flooding of the soil after 180 days caused a loss of N added to the soil by the soybean and sorghum residues. In general, larger amounts of 15N were reported in the fraction <53 μm, associated with clay minerals, throughout the incubation period. These N losses should be considered in N fertilization for the following crops in rotation with flooded rice. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000400251 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000400251 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0103-8478cr20180747 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
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 Rural v.49 n.4 2019 reponame:Ciência Rural 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 Rural |
collection |
Ciência Rural |
repository.name.fl_str_mv |
|
repository.mail.fl_str_mv |
|
_version_ |
1749140553504653312 |