STABLE MICROAGGREGATES AND NUTRIENT POOL IN OXISOL UNDER PASTURE IN SAVANNAH REGION
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Tropical (Online) |
Texto Completo: | https://revistas.ufg.br/pat/article/view/8771 |
Resumo: | Nutrients preserved in microaggregates are an important fraction of the pool of nutrients in highly weathered soils. With the objective of better understanding the nutrients distribution in microaggregates of fine-sand (200-50 ?m) and coarse-silt (50-20 ?m), in a Rhodic Haplustox, the present study utilized an adapted physical fractionation procedure with mineralogical and chemical characterization. Part of the soil fractions was characterized as microaggregates formed by clay and silt minerals, with high macro and micronutrients contents. P, Cu, Mn, and Zn were more efficiently accumulated in the microaggregates and less susceptive to removal by the weathering and leaching actions, when compared to K and Mg. Higher C contents were found in the superficial horizon microaggregates (50-20 ?m), showing evidences of an efficient physical protection against mineralization. Macro and micronutrients pools (total contents), in the 200-50 ?m and 50-20 ?m microaggregates, corresponded to 5-19% of the total soil nutrients content, and 24-26% of the total soil carbon was seized by those microaggregates. Although these microaggregates present a low capacity to store nutrients, they become an important and highly stable compartment to preserve nutrients, as far as physical degradation and weathering and leaching are concerned.KEY-WORDS: Soil aggregation; physical fractionation; macronutrients; micronutrients; organic matter storage. |
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STABLE MICROAGGREGATES AND NUTRIENT POOL IN OXISOL UNDER PASTURE IN SAVANNAH REGIONMICROAGREGADOS ESTÁVEIS E RESERVA DE NUTRIENTES EM LATOSSOLO VERMELHO SOB PASTAGEM EM REGIÃO DE CERRADOSoil aggregationphysical fractionationmacronutrientsmicronutrientsorganic matter storageAgregados do solofracionamento físicomacronutrientesmicronutrientesestoque de matéria orgânicaNutrients preserved in microaggregates are an important fraction of the pool of nutrients in highly weathered soils. With the objective of better understanding the nutrients distribution in microaggregates of fine-sand (200-50 ?m) and coarse-silt (50-20 ?m), in a Rhodic Haplustox, the present study utilized an adapted physical fractionation procedure with mineralogical and chemical characterization. Part of the soil fractions was characterized as microaggregates formed by clay and silt minerals, with high macro and micronutrients contents. P, Cu, Mn, and Zn were more efficiently accumulated in the microaggregates and less susceptive to removal by the weathering and leaching actions, when compared to K and Mg. Higher C contents were found in the superficial horizon microaggregates (50-20 ?m), showing evidences of an efficient physical protection against mineralization. Macro and micronutrients pools (total contents), in the 200-50 ?m and 50-20 ?m microaggregates, corresponded to 5-19% of the total soil nutrients content, and 24-26% of the total soil carbon was seized by those microaggregates. Although these microaggregates present a low capacity to store nutrients, they become an important and highly stable compartment to preserve nutrients, as far as physical degradation and weathering and leaching are concerned.KEY-WORDS: Soil aggregation; physical fractionation; macronutrients; micronutrients; organic matter storage. Nutrientes preservados em microagregados podem constituir reserva importante em solos altamente intemperizados. Com o objetivo de melhor compreender a distribuição de nutrientes em microagregados contidos em frações granulométricas de 200-50 um e 50-20 um, de um Latossolo Vermelho distrófico típico, utilizou-se um procedimento de fracionamento físico, adaptado para o objetivo deste estudo, em conjunto com análises químicas e mineralógicas. Parte destas frações foi caracterizada como microagregados constituídos por minerais da fração argila e silte, com altos teores de macro e micronutrientes. P, Cu, Mn e Zn foram mais eficientemente acumulados nos microagregados e menos susceptíveis à remoção, pela ação do intemperismo e lixiviação, em comparação ao K e Mg. Maiores teores de C foram encontrados nos microagregados de 50-20 um do horizonte superficial, devido à proteção física mais eficiente contra a mineralização. Os estoques de macro e micronutrientes (teores totais), nos microagregados (200-50 um e 50-20 um), corresponderam a 5-19% do total de nutrientes no solo, e 24-26% do total de carbono do solo esteve sequestrado nestes microagregados. Apesar da baixa capacidade de reserva destes microagregados, eles tornam-se um compartimento de alta estabilidade, com maior eficiência na função de preservar os nutrientes, frente à degradação física e ao intemperismo e lixiviação. PALAVRAS-CHAVE: Agregados do solo; fracionamento físico; macronutrientes; micronutrientes; estoque de matéria orgânica.Escola de Agronomia - Universidade Federal de Goiás2011-06-14info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPesquisa de Observação Natural; Métodos quantitativosapplication/savehttps://revistas.ufg.br/pat/article/view/8771Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics]; v. 41, n. 2, Apr./Jun. 2011; 229-241Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics); v. 41, n. 2, abr./jun. 2011; 229-241Pesquisa Agropecuária Tropical; v. 41, n. 2, abr./jun. 2011; 229-2411983-4063reponame:Pesquisa Agropecuária Tropical (Online)instname:Universidade Federal de Goiás (UFG)instacron:UFGporhttps://revistas.ufg.br/pat/article/view/8771/9176Copyright (c) 2020 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics)info:eu-repo/semantics/openAccessBurak, Diego LangFontes, Maurício Paulo FerreiraBecquer, Thierry2020-07-09T18:32:36Zoai:ojs.revistas.ufg.br:article/8771Revistahttps://revistas.ufg.br/patPUBhttps://revistas.ufg.br/pat/oaiaseleguini.pat@gmail.com||mgoes@agro.ufg.br1983-40631517-6398opendoar:2024-05-21T19:55:47.884684Pesquisa Agropecuária Tropical (Online) - Universidade Federal de Goiás (UFG)true |
dc.title.none.fl_str_mv |
STABLE MICROAGGREGATES AND NUTRIENT POOL IN OXISOL UNDER PASTURE IN SAVANNAH REGION MICROAGREGADOS ESTÁVEIS E RESERVA DE NUTRIENTES EM LATOSSOLO VERMELHO SOB PASTAGEM EM REGIÃO DE CERRADO |
title |
STABLE MICROAGGREGATES AND NUTRIENT POOL IN OXISOL UNDER PASTURE IN SAVANNAH REGION |
spellingShingle |
STABLE MICROAGGREGATES AND NUTRIENT POOL IN OXISOL UNDER PASTURE IN SAVANNAH REGION Burak, Diego Lang Soil aggregation physical fractionation macronutrients micronutrients organic matter storage Agregados do solo fracionamento físico macronutrientes micronutrientes estoque de matéria orgânica |
title_short |
STABLE MICROAGGREGATES AND NUTRIENT POOL IN OXISOL UNDER PASTURE IN SAVANNAH REGION |
title_full |
STABLE MICROAGGREGATES AND NUTRIENT POOL IN OXISOL UNDER PASTURE IN SAVANNAH REGION |
title_fullStr |
STABLE MICROAGGREGATES AND NUTRIENT POOL IN OXISOL UNDER PASTURE IN SAVANNAH REGION |
title_full_unstemmed |
STABLE MICROAGGREGATES AND NUTRIENT POOL IN OXISOL UNDER PASTURE IN SAVANNAH REGION |
title_sort |
STABLE MICROAGGREGATES AND NUTRIENT POOL IN OXISOL UNDER PASTURE IN SAVANNAH REGION |
author |
Burak, Diego Lang |
author_facet |
Burak, Diego Lang Fontes, Maurício Paulo Ferreira Becquer, Thierry |
author_role |
author |
author2 |
Fontes, Maurício Paulo Ferreira Becquer, Thierry |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Burak, Diego Lang Fontes, Maurício Paulo Ferreira Becquer, Thierry |
dc.subject.por.fl_str_mv |
Soil aggregation physical fractionation macronutrients micronutrients organic matter storage Agregados do solo fracionamento físico macronutrientes micronutrientes estoque de matéria orgânica |
topic |
Soil aggregation physical fractionation macronutrients micronutrients organic matter storage Agregados do solo fracionamento físico macronutrientes micronutrientes estoque de matéria orgânica |
description |
Nutrients preserved in microaggregates are an important fraction of the pool of nutrients in highly weathered soils. With the objective of better understanding the nutrients distribution in microaggregates of fine-sand (200-50 ?m) and coarse-silt (50-20 ?m), in a Rhodic Haplustox, the present study utilized an adapted physical fractionation procedure with mineralogical and chemical characterization. Part of the soil fractions was characterized as microaggregates formed by clay and silt minerals, with high macro and micronutrients contents. P, Cu, Mn, and Zn were more efficiently accumulated in the microaggregates and less susceptive to removal by the weathering and leaching actions, when compared to K and Mg. Higher C contents were found in the superficial horizon microaggregates (50-20 ?m), showing evidences of an efficient physical protection against mineralization. Macro and micronutrients pools (total contents), in the 200-50 ?m and 50-20 ?m microaggregates, corresponded to 5-19% of the total soil nutrients content, and 24-26% of the total soil carbon was seized by those microaggregates. Although these microaggregates present a low capacity to store nutrients, they become an important and highly stable compartment to preserve nutrients, as far as physical degradation and weathering and leaching are concerned.KEY-WORDS: Soil aggregation; physical fractionation; macronutrients; micronutrients; organic matter storage. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-06-14 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Pesquisa de Observação Natural; Métodos quantitativos |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://revistas.ufg.br/pat/article/view/8771 |
url |
https://revistas.ufg.br/pat/article/view/8771 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://revistas.ufg.br/pat/article/view/8771/9176 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2020 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics) info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2020 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics) |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/save |
dc.publisher.none.fl_str_mv |
Escola de Agronomia - Universidade Federal de Goiás |
publisher.none.fl_str_mv |
Escola de Agronomia - Universidade Federal de Goiás |
dc.source.none.fl_str_mv |
Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics]; v. 41, n. 2, Apr./Jun. 2011; 229-241 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics); v. 41, n. 2, abr./jun. 2011; 229-241 Pesquisa Agropecuária Tropical; v. 41, n. 2, abr./jun. 2011; 229-241 1983-4063 reponame:Pesquisa Agropecuária Tropical (Online) instname:Universidade Federal de Goiás (UFG) instacron:UFG |
instname_str |
Universidade Federal de Goiás (UFG) |
instacron_str |
UFG |
institution |
UFG |
reponame_str |
Pesquisa Agropecuária Tropical (Online) |
collection |
Pesquisa Agropecuária Tropical (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Tropical (Online) - Universidade Federal de Goiás (UFG) |
repository.mail.fl_str_mv |
aseleguini.pat@gmail.com||mgoes@agro.ufg.br |
_version_ |
1799874817534459904 |