Impacto do manejo agr?cola em Organossolos no estado do Rio de Janeiro

Detalhes bibliográficos
Autor(a) principal: Santos, Otavio Augusto Queiroz dos
Data de Publicação: 2020
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Biblioteca Digital de Teses e Dissertações da UFRRJ
Texto Completo: https://tede.ufrrj.br/jspui/handle/jspui/6326
Resumo: Histosols are defined by the high levels of organic matter and they are very important for storing carbon and nitrogen, thus contributing in mitigating greenhouse gases (GHG). Proper management of these soils should preserve organic matter, consequently, mitigating GHG production. This study aimed to evaluate the following changes in the properties of Histosols due to the soil tillage and artificial drainage: organic matter and sulfate content, C and N stocks, availability and content of P fractions. Three areas with different coverages were selected: secondary forest in natural regeneration, conventional cultivation of cassava (Manihot sculenta) and intercropped coconut (Cocos nucifera) with cassava; in which soil pits were opened for profiles description and sampling. The following analyzes were carried out: chemical characterization, von Post scale of decomposition of organic matter, percentage of rubbed fibers, organic matter content, percentage of mineral material, bulk density, electrical conductivity, soluble sulfate, total organic carbon (TOC) and total nitrogen (NT). There were calculated the stocks of C and N, and obtained fractionation of organic matter and sequential fractionation of P. The results of chapter I showed that the values of COT and NT decreased in 33 and 20%, respectively, in the histic horizon of the area with cassava crop. In the area with coconut intercropped with manioc, the TOC and NT values decreased by 31 and 18% respectively, in the histic horizon. There were losses of labile organic carbon and the sulfurization process was evidenced in the profiles with agricultural usage. In the chapter II, the results show that in the cassava cultivation area there was a reduction in the total P content in the subsurface by 35.6 and 37.9%, when compared to the area with coconut intercropped with cassava and the secondary forest, respectively. In all areas, there was predominance of the highly recalcitrant residual P fraction (> 70%). The available P content was reduced only in the cassava cultivation area. Drainage and soil tillage reduced the C and N stocks in the soil, and affected P adsorption and mineralization processes, in all the inorganic fractions.
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spelling Pereira, Marcos Gervasio874.292.767-68http://lattes.cnpq.br/3657759682534978Garc?a, Andr?s Calder?nPereira, Marcos GervasioLoss, Arc?ngeloSchiavo, Jolimar Antonio420.697.918-90http://lattes.cnpq.br/5893308385515780Santos, Otavio Augusto Queiroz dos2023-02-15T16:00:00Z2020-10-26SANTOS, Otavio Augusto Queiroz dos. Impacto do manejo agr?cola em Organossolos no estado do Rio de Janeiro. 2020. 67 f. Disserta??o (Mestrado em Agronomia - Ci?ncia do Solo) - Instituto de Agronomia, Universidade Federal Rural do Rio de Janeiro, Serop?dica, RJ, 2020.https://tede.ufrrj.br/jspui/handle/jspui/6326Histosols are defined by the high levels of organic matter and they are very important for storing carbon and nitrogen, thus contributing in mitigating greenhouse gases (GHG). Proper management of these soils should preserve organic matter, consequently, mitigating GHG production. This study aimed to evaluate the following changes in the properties of Histosols due to the soil tillage and artificial drainage: organic matter and sulfate content, C and N stocks, availability and content of P fractions. Three areas with different coverages were selected: secondary forest in natural regeneration, conventional cultivation of cassava (Manihot sculenta) and intercropped coconut (Cocos nucifera) with cassava; in which soil pits were opened for profiles description and sampling. The following analyzes were carried out: chemical characterization, von Post scale of decomposition of organic matter, percentage of rubbed fibers, organic matter content, percentage of mineral material, bulk density, electrical conductivity, soluble sulfate, total organic carbon (TOC) and total nitrogen (NT). There were calculated the stocks of C and N, and obtained fractionation of organic matter and sequential fractionation of P. The results of chapter I showed that the values of COT and NT decreased in 33 and 20%, respectively, in the histic horizon of the area with cassava crop. In the area with coconut intercropped with manioc, the TOC and NT values decreased by 31 and 18% respectively, in the histic horizon. There were losses of labile organic carbon and the sulfurization process was evidenced in the profiles with agricultural usage. In the chapter II, the results show that in the cassava cultivation area there was a reduction in the total P content in the subsurface by 35.6 and 37.9%, when compared to the area with coconut intercropped with cassava and the secondary forest, respectively. In all areas, there was predominance of the highly recalcitrant residual P fraction (> 70%). The available P content was reduced only in the cassava cultivation area. Drainage and soil tillage reduced the C and N stocks in the soil, and affected P adsorption and mineralization processes, in all the inorganic fractions.Organossolos s?o definidos pelo elevado teor de mat?ria org?nica e s?o relevantes pelo estoque de carbono e nitrog?nio, assim contribuindo para a mitiga??o de gases de efeito estufa (GEE). O manejo adequado desses solos deve preservar a mat?ria org?nica, consequentemente, mitigando a produ??o de GEE. Este estudo objetivou avaliar as seguintes altera??es nas propriedades dos Organossolos em fun??o do revolvimento do solo e drenagem artificial: conte?do de mat?ria org?nica e de sulfato, estoques de C e N, disponibilidade e conte?do das fra??es de P. Foram selecionadas tr?s ?reas com diferentes coberturas: mata secund?ria em regenera??o natural, cultivo convencional de mandioca (Manihot sculenta) e cultivo consorciado de coco (Cocos nucifera) com mandioca; nas quais foram abertas trincheiras para descri??o de perfis de solo e coleta de amostras. Foram realizadas as seguintes an?lises: caracteriza??o qu?mica, escala de von Post de decomposi??o da mat?ria org?nica, porcentagem de fibras esfregadas, conte?do de mat?ria org?nica, porcentagem de material mineral, densidade do solo, condutividade el?trica, sulfato sol?vel, carbono org?nico total (COT) e nitrog?nio total (NT). Foram calculados os estoques de C e N, e realizados o fracionamento da mat?ria org?nica e fracionamento sequencial de P. Os resultados do cap?tulo I mostraram que os valores de COT e NT diminu?ram 33 e 20%, respectivamente, no horizonte h?stico na ?rea com cultivo de mandioca. Na ?rea de coco consorciado com mandioca os valores de COT e NT diminu?ram 31 e 18% respectivamente, no horizonte h?stico. Verificou-se perdas de carbono org?nico l?bil e o processo de sulfuriza??o foi evidenciado nos perfis com uso agr?cola. No cap?tulo II os resultados mostram que na ?rea de cultivo de mandioca houve redu??o no conte?do de P total em subsuperf?cie em 35,6 e 37,9%, quando comparado com a de cultivo de coco consorciado com mandioca e a floresta secund?ria, respectivamente. Em todas as ?reas observou-se o predom?nio da fra??o de P residual altamente recalcitrante (> 70%). O conte?do de P dispon?vel foi reduzido somente na ?rea de cultivo de mandioca. A drenagem e o revolvimento do solo reduziram dos estoques de C e N do solo e afetou os processos de adsor??o e mineraliza??o do P, em todas suas fra??es inorg?nicas.Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2023-02-15T16:00:00Z No. of bitstreams: 1 2020 - Otavio Augusto Queiroz dos Santos.pdf: 5318158 bytes, checksum: f7464ca9a84b8e375538e9cadfd2fb07 (MD5)Made available in DSpace on 2023-02-15T16:00:00Z (GMT). No. of bitstreams: 1 2020 - Otavio Augusto Queiroz dos Santos.pdf: 5318158 bytes, checksum: f7464ca9a84b8e375538e9cadfd2fb07 (MD5) Previous issue date: 2020-10-26CAPES - Coordena??o de Aperfei?oamento de Pessoal de N?vel Superiorapplication/pdfhttps://tede.ufrrj.br/retrieve/72176/2020%20-%20Otavio%20Augusto%20Queiroz%20dos%20Santos.pdf.jpgporUniversidade Federal Rural do Rio de JaneiroPrograma de P?s-Gradua??o em Agronomia - Ci?ncia do SoloUFRRJBrasilInstituto de AgronomiaARSENAULT, J.; TALBOT, J.; MOORE, T. R. 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dc.title.por.fl_str_mv Impacto do manejo agr?cola em Organossolos no estado do Rio de Janeiro
dc.title.alternative.eng.fl_str_mv Impact of agricultural management in Histosols in Rio de Janeiro State
title Impacto do manejo agr?cola em Organossolos no estado do Rio de Janeiro
spellingShingle Impacto do manejo agr?cola em Organossolos no estado do Rio de Janeiro
Santos, Otavio Augusto Queiroz dos
Uso do solo
Estoques de C e N
Fracionamento sequencial de P
Subsid?ncia
Sulfuriza??o
Land use
C and N stocks
P sequential fractionation
Subsidence
Sulfurization
Agronomia
title_short Impacto do manejo agr?cola em Organossolos no estado do Rio de Janeiro
title_full Impacto do manejo agr?cola em Organossolos no estado do Rio de Janeiro
title_fullStr Impacto do manejo agr?cola em Organossolos no estado do Rio de Janeiro
title_full_unstemmed Impacto do manejo agr?cola em Organossolos no estado do Rio de Janeiro
title_sort Impacto do manejo agr?cola em Organossolos no estado do Rio de Janeiro
author Santos, Otavio Augusto Queiroz dos
author_facet Santos, Otavio Augusto Queiroz dos
author_role author
dc.contributor.advisor1.fl_str_mv Pereira, Marcos Gervasio
dc.contributor.advisor1ID.fl_str_mv 874.292.767-68
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/3657759682534978
dc.contributor.advisor-co1.fl_str_mv Garc?a, Andr?s Calder?n
dc.contributor.referee1.fl_str_mv Pereira, Marcos Gervasio
dc.contributor.referee2.fl_str_mv Loss, Arc?ngelo
dc.contributor.referee3.fl_str_mv Schiavo, Jolimar Antonio
dc.contributor.authorID.fl_str_mv 420.697.918-90
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/5893308385515780
dc.contributor.author.fl_str_mv Santos, Otavio Augusto Queiroz dos
contributor_str_mv Pereira, Marcos Gervasio
Garc?a, Andr?s Calder?n
Pereira, Marcos Gervasio
Loss, Arc?ngelo
Schiavo, Jolimar Antonio
dc.subject.por.fl_str_mv Uso do solo
Estoques de C e N
Fracionamento sequencial de P
Subsid?ncia
Sulfuriza??o
topic Uso do solo
Estoques de C e N
Fracionamento sequencial de P
Subsid?ncia
Sulfuriza??o
Land use
C and N stocks
P sequential fractionation
Subsidence
Sulfurization
Agronomia
dc.subject.eng.fl_str_mv Land use
C and N stocks
P sequential fractionation
Subsidence
Sulfurization
dc.subject.cnpq.fl_str_mv Agronomia
description Histosols are defined by the high levels of organic matter and they are very important for storing carbon and nitrogen, thus contributing in mitigating greenhouse gases (GHG). Proper management of these soils should preserve organic matter, consequently, mitigating GHG production. This study aimed to evaluate the following changes in the properties of Histosols due to the soil tillage and artificial drainage: organic matter and sulfate content, C and N stocks, availability and content of P fractions. Three areas with different coverages were selected: secondary forest in natural regeneration, conventional cultivation of cassava (Manihot sculenta) and intercropped coconut (Cocos nucifera) with cassava; in which soil pits were opened for profiles description and sampling. The following analyzes were carried out: chemical characterization, von Post scale of decomposition of organic matter, percentage of rubbed fibers, organic matter content, percentage of mineral material, bulk density, electrical conductivity, soluble sulfate, total organic carbon (TOC) and total nitrogen (NT). There were calculated the stocks of C and N, and obtained fractionation of organic matter and sequential fractionation of P. The results of chapter I showed that the values of COT and NT decreased in 33 and 20%, respectively, in the histic horizon of the area with cassava crop. In the area with coconut intercropped with manioc, the TOC and NT values decreased by 31 and 18% respectively, in the histic horizon. There were losses of labile organic carbon and the sulfurization process was evidenced in the profiles with agricultural usage. In the chapter II, the results show that in the cassava cultivation area there was a reduction in the total P content in the subsurface by 35.6 and 37.9%, when compared to the area with coconut intercropped with cassava and the secondary forest, respectively. In all areas, there was predominance of the highly recalcitrant residual P fraction (> 70%). The available P content was reduced only in the cassava cultivation area. Drainage and soil tillage reduced the C and N stocks in the soil, and affected P adsorption and mineralization processes, in all the inorganic fractions.
publishDate 2020
dc.date.issued.fl_str_mv 2020-10-26
dc.date.accessioned.fl_str_mv 2023-02-15T16:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.citation.fl_str_mv SANTOS, Otavio Augusto Queiroz dos. Impacto do manejo agr?cola em Organossolos no estado do Rio de Janeiro. 2020. 67 f. Disserta??o (Mestrado em Agronomia - Ci?ncia do Solo) - Instituto de Agronomia, Universidade Federal Rural do Rio de Janeiro, Serop?dica, RJ, 2020.
dc.identifier.uri.fl_str_mv https://tede.ufrrj.br/jspui/handle/jspui/6326
identifier_str_mv SANTOS, Otavio Augusto Queiroz dos. Impacto do manejo agr?cola em Organossolos no estado do Rio de Janeiro. 2020. 67 f. Disserta??o (Mestrado em Agronomia - Ci?ncia do Solo) - Instituto de Agronomia, Universidade Federal Rural do Rio de Janeiro, Serop?dica, RJ, 2020.
url https://tede.ufrrj.br/jspui/handle/jspui/6326
dc.language.iso.fl_str_mv por
language por
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