Dinâmica do carbono durante a decomposição de palha de trigo marcada com 13C e dejetos líquidos de suínos
Autor(a) principal: | |
---|---|
Data de Publicação: | 2007 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/5618 |
Resumo: | In no-tillage areas, the pig slurry is applied on the cultural residues, as much as cover or commercial crops. A few research information exists involving the soil carbon dynamics with this modality of pig slurry application. A better understanding of soil carbon dynamics during the decomposition of pig slurry and cultural residues is necessary, as much of the environmental point of view as of the maintenance and improvement of soil quality. This work was carried out in laboratory conditions, with the objective of evaluating the dynamics of the carbon during the decomposition of 13C-labelled wheat straw and pig slurry, used separately or mixed, with and without soil incorporation. In a Hapludalf soil and using an entirely randomized design were evaluated the following treatments, with four replications: T1 - Soil; T2 - Soil + straw in surface; T3 - Soil + incorporated straw; T4 - Soil + pig slurry in surface; T5 - Soil + pig slurry incorporated; T6 - Soil + pig slurry incorporated + straw in surface; T7 - Soil + pig slurry incorporated + incorporated straw; T8 - Soil + straw in surface + pig slurry in surface. The soil humidity was adjusted for 100% of the field capacity and the incubation was carried out for 95 days with temperature kept in 25ºC. The C-CO2 evolution and its isotopic 13C excess were evaluated continually and, periodically, the amounts of remaining C straw and C soil, with their respective 13C isotopic excess. The apparent C mineralization of pig slurry didn't increased with its soil incorporation, which just favored the straw C mineralization. In the treatments with wheat straw, with and without pig slurry, the apparent C mineralization (C-CO2) of straw in 95 days was, on average, of 58,4%, while the real C straw mineralization (13C-CO2) was of 45,8%, evidencing the occurrence of positive "priming effect." Despite of the high C/N (65,2) of wheat straw, its C mineralization just increased when was maintained in soil surface and the pig slurry were applied on the straw. In this condition, where the contact of straw with the soil is deficient, the presence of N mineral of pig slurry favored the heterotrophic microbial population, responsible for straw decomposition. With the higher contact of the straw with the soil, for its incorporation, the microorganisms supplied their N needs for biosynthesis from straw and soil organic matter mineralization, independently of N from pig slurry application. At the end of the experiment, the balance of 13C (13C-straw + 13C-soil + 13C-CO2), indicated that, in the average of all treatments, about 24% of the applied 13C with the straw were not recovered, probably for the incomplete capture of the 13C-CO2 liberated and for the difficulty in recovering the straw completely, in the treatments in that it was incorporated to the soil |
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2017-03-292017-03-292007-05-11LUZ, Laura Patrícia da. Carbon dynamics during decomposition of 13C-labelled wheat straw and pig slurry. 2007. 72 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2007.http://repositorio.ufsm.br/handle/1/5618In no-tillage areas, the pig slurry is applied on the cultural residues, as much as cover or commercial crops. A few research information exists involving the soil carbon dynamics with this modality of pig slurry application. A better understanding of soil carbon dynamics during the decomposition of pig slurry and cultural residues is necessary, as much of the environmental point of view as of the maintenance and improvement of soil quality. This work was carried out in laboratory conditions, with the objective of evaluating the dynamics of the carbon during the decomposition of 13C-labelled wheat straw and pig slurry, used separately or mixed, with and without soil incorporation. In a Hapludalf soil and using an entirely randomized design were evaluated the following treatments, with four replications: T1 - Soil; T2 - Soil + straw in surface; T3 - Soil + incorporated straw; T4 - Soil + pig slurry in surface; T5 - Soil + pig slurry incorporated; T6 - Soil + pig slurry incorporated + straw in surface; T7 - Soil + pig slurry incorporated + incorporated straw; T8 - Soil + straw in surface + pig slurry in surface. The soil humidity was adjusted for 100% of the field capacity and the incubation was carried out for 95 days with temperature kept in 25ºC. The C-CO2 evolution and its isotopic 13C excess were evaluated continually and, periodically, the amounts of remaining C straw and C soil, with their respective 13C isotopic excess. The apparent C mineralization of pig slurry didn't increased with its soil incorporation, which just favored the straw C mineralization. In the treatments with wheat straw, with and without pig slurry, the apparent C mineralization (C-CO2) of straw in 95 days was, on average, of 58,4%, while the real C straw mineralization (13C-CO2) was of 45,8%, evidencing the occurrence of positive "priming effect." Despite of the high C/N (65,2) of wheat straw, its C mineralization just increased when was maintained in soil surface and the pig slurry were applied on the straw. In this condition, where the contact of straw with the soil is deficient, the presence of N mineral of pig slurry favored the heterotrophic microbial population, responsible for straw decomposition. With the higher contact of the straw with the soil, for its incorporation, the microorganisms supplied their N needs for biosynthesis from straw and soil organic matter mineralization, independently of N from pig slurry application. At the end of the experiment, the balance of 13C (13C-straw + 13C-soil + 13C-CO2), indicated that, in the average of all treatments, about 24% of the applied 13C with the straw were not recovered, probably for the incomplete capture of the 13C-CO2 liberated and for the difficulty in recovering the straw completely, in the treatments in that it was incorporated to the soilEm áreas de plantio direto, os dejetos de suínos são aplicados sobre os resíduos culturais, tanto de plantas de cobertura de solo como das culturas comerciais. Existem poucas informações de pesquisa envolvendo a dinâmica do carbono no solo com esta modalidade de aplicação dos dejetos. Uma melhor compreensão da dinâmica do carbono durante a decomposição de dejetos de suínos e resíduos culturais é fundamental, tanto do ponto de vista ambiental quanto da manutenção e melhoria da capacidade produtiva do solo. Este trabalho foi conduzido, em condições de laboratório, com o objetivo de avaliar a dinâmica do carbono durante a decomposição de palha de trigo enriquecida com 13C e dejetos líquidos de suínos, utilizados isoladamente ou misturados, com e sem incorporação ao solo. Num Argissolo Vermelho distrófico arênico e utilizando o delineamento experimental inteiramente casualizado, com quatro repetições, foram avaliados os seguintes tratamentos: T1- Solo; T2- Solo + palha em superfície; T3- Solo + palha incorporada; T4- Solo + dejetos em superfície; T5- Solo + dejetos incorporados; T6- Solo + dejetos incorporados + palha em superfície; T7- Solo + dejetos incorporados + palha incorporada; T8- Solo + palha em superfície + dejetos em superfície. A umidade do solo foi ajustada para 100% da capacidade de campo e a incubação foi conduzida durante 95 dias a uma temperatura de 25ºC. Foram avaliados, continuamente, a liberação de C-CO2 e o seu excesso isotópico em 13C e, periodicamente, as quantidades remanescentes de matéria seca e de C da palha e de C no solo, com seus respectivos excessos isotópicos em 13C. A mineralização aparente do C dos dejetos não aumentou pela sua incorporação ao solo, a qual favoreceu apenas a mineralização do C da palha. Nos tratamentos com palha de trigo, com e sem dejetos, a mineralização aparente do C da palha (C-CO2) aos 95 dias foi, em média, de 58,4%, enquanto a mineralização real (13C-CO2) foi de 45,8%, evidenciando a ocorrência de efeito priming positivo. Apesar da elevada relação C/N (65,2) da palha de trigo, a sua mineralização aumentou apenas quando ela foi mantida na superfície do solo e os dejetos suínos foram aplicados sobre a mesma. Nessa condição, em que o contato da palha com o solo é deficiente, a presença do N mineral dos dejetos favoreceu a população microbiana heterotrófica, responsável pela decomposição da palha. Com o maior contato da palha com o solo, pela sua incorporação, os microrganismos atenderam sua demanda em N para a biossíntese a partir da mineralização da palha e da matéria orgânica do solo, independentemente do N aplicado com os dejetos. Ao final do experimento, o balanço de 13C (13C-palha + 13C-solo + 13C-CO2), indicou que, na média de todos os tratamentos, aproximadamente 24% do 13C aplicado com a palha não foram recuperados, provavelmente pela captura incompleta do 13C-CO2 liberado e pela dificuldade em recuperar completamente a palha nos tratamentos em que ela foi incorporada ao soloapplication/pdfporUniversidade Federal de Santa MariaPrograma de Pós-Graduação em Ciência do SoloUFSMBRAgronomiaMineralização aparente do CMineralização real do CEmissão de C-CO2Apparent C mineralizationReal C mineralizationC-CO2 emissionCNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLODinâmica do carbono durante a decomposição de palha de trigo marcada com 13C e dejetos líquidos de suínosCarbon dynamics during decomposition of 13C-labelled wheat straw and pig slurryinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisAita, Celsohttp://lattes.cnpq.br/7391004032643110Campos, Ben-hur Costa dehttp://lattes.cnpq.br/8524367039071342Giacomini, Sandro Joséhttp://lattes.cnpq.br/1112466940331009http://lattes.cnpq.br/3327155755644193Luz, Laura Patrícia da500100100005400500300500500faed6ca8-aa2b-4289-9d78-aa62effd4bf519821797-1f5a-48e4-b87f-6c26998998f898b8997a-093c-4f94-8190-34d72904cca44da81f95-6119-4e87-9016-d2ce34fc383cinfo:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALLaura.pdfapplication/pdf3074352http://repositorio.ufsm.br/bitstream/1/5618/1/Laura.pdf2862c4857a6984c9b9683c7c1f7a5a17MD51TEXTLaura.pdf.txtLaura.pdf.txtExtracted texttext/plain153979http://repositorio.ufsm.br/bitstream/1/5618/2/Laura.pdf.txt8fca1319f60fd1c311f20b88a33af02eMD52THUMBNAILLaura.pdf.jpgLaura.pdf.jpgIM Thumbnailimage/jpeg5085http://repositorio.ufsm.br/bitstream/1/5618/3/Laura.pdf.jpgae34f665e7b784d666f9b9271eab0a13MD531/56182022-03-08 11:26:25.153oai:repositorio.ufsm.br:1/5618Repositório Institucionalhttp://repositorio.ufsm.br/PUBhttp://repositorio.ufsm.br/oai/requestopendoar:39132022-03-08T14:26:25Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.por.fl_str_mv |
Dinâmica do carbono durante a decomposição de palha de trigo marcada com 13C e dejetos líquidos de suínos |
dc.title.alternative.eng.fl_str_mv |
Carbon dynamics during decomposition of 13C-labelled wheat straw and pig slurry |
title |
Dinâmica do carbono durante a decomposição de palha de trigo marcada com 13C e dejetos líquidos de suínos |
spellingShingle |
Dinâmica do carbono durante a decomposição de palha de trigo marcada com 13C e dejetos líquidos de suínos Luz, Laura Patrícia da Mineralização aparente do C Mineralização real do C Emissão de C-CO2 Apparent C mineralization Real C mineralization C-CO2 emission CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLO |
title_short |
Dinâmica do carbono durante a decomposição de palha de trigo marcada com 13C e dejetos líquidos de suínos |
title_full |
Dinâmica do carbono durante a decomposição de palha de trigo marcada com 13C e dejetos líquidos de suínos |
title_fullStr |
Dinâmica do carbono durante a decomposição de palha de trigo marcada com 13C e dejetos líquidos de suínos |
title_full_unstemmed |
Dinâmica do carbono durante a decomposição de palha de trigo marcada com 13C e dejetos líquidos de suínos |
title_sort |
Dinâmica do carbono durante a decomposição de palha de trigo marcada com 13C e dejetos líquidos de suínos |
author |
Luz, Laura Patrícia da |
author_facet |
Luz, Laura Patrícia da |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Aita, Celso |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/7391004032643110 |
dc.contributor.referee1.fl_str_mv |
Campos, Ben-hur Costa de |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/8524367039071342 |
dc.contributor.referee2.fl_str_mv |
Giacomini, Sandro José |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/1112466940331009 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/3327155755644193 |
dc.contributor.author.fl_str_mv |
Luz, Laura Patrícia da |
contributor_str_mv |
Aita, Celso Campos, Ben-hur Costa de Giacomini, Sandro José |
dc.subject.por.fl_str_mv |
Mineralização aparente do C Mineralização real do C Emissão de C-CO2 |
topic |
Mineralização aparente do C Mineralização real do C Emissão de C-CO2 Apparent C mineralization Real C mineralization C-CO2 emission CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLO |
dc.subject.eng.fl_str_mv |
Apparent C mineralization Real C mineralization C-CO2 emission |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLO |
description |
In no-tillage areas, the pig slurry is applied on the cultural residues, as much as cover or commercial crops. A few research information exists involving the soil carbon dynamics with this modality of pig slurry application. A better understanding of soil carbon dynamics during the decomposition of pig slurry and cultural residues is necessary, as much of the environmental point of view as of the maintenance and improvement of soil quality. This work was carried out in laboratory conditions, with the objective of evaluating the dynamics of the carbon during the decomposition of 13C-labelled wheat straw and pig slurry, used separately or mixed, with and without soil incorporation. In a Hapludalf soil and using an entirely randomized design were evaluated the following treatments, with four replications: T1 - Soil; T2 - Soil + straw in surface; T3 - Soil + incorporated straw; T4 - Soil + pig slurry in surface; T5 - Soil + pig slurry incorporated; T6 - Soil + pig slurry incorporated + straw in surface; T7 - Soil + pig slurry incorporated + incorporated straw; T8 - Soil + straw in surface + pig slurry in surface. The soil humidity was adjusted for 100% of the field capacity and the incubation was carried out for 95 days with temperature kept in 25ºC. The C-CO2 evolution and its isotopic 13C excess were evaluated continually and, periodically, the amounts of remaining C straw and C soil, with their respective 13C isotopic excess. The apparent C mineralization of pig slurry didn't increased with its soil incorporation, which just favored the straw C mineralization. In the treatments with wheat straw, with and without pig slurry, the apparent C mineralization (C-CO2) of straw in 95 days was, on average, of 58,4%, while the real C straw mineralization (13C-CO2) was of 45,8%, evidencing the occurrence of positive "priming effect." Despite of the high C/N (65,2) of wheat straw, its C mineralization just increased when was maintained in soil surface and the pig slurry were applied on the straw. In this condition, where the contact of straw with the soil is deficient, the presence of N mineral of pig slurry favored the heterotrophic microbial population, responsible for straw decomposition. With the higher contact of the straw with the soil, for its incorporation, the microorganisms supplied their N needs for biosynthesis from straw and soil organic matter mineralization, independently of N from pig slurry application. At the end of the experiment, the balance of 13C (13C-straw + 13C-soil + 13C-CO2), indicated that, in the average of all treatments, about 24% of the applied 13C with the straw were not recovered, probably for the incomplete capture of the 13C-CO2 liberated and for the difficulty in recovering the straw completely, in the treatments in that it was incorporated to the soil |
publishDate |
2007 |
dc.date.issued.fl_str_mv |
2007-05-11 |
dc.date.accessioned.fl_str_mv |
2017-03-29 |
dc.date.available.fl_str_mv |
2017-03-29 |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/masterThesis |
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masterThesis |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
LUZ, Laura Patrícia da. Carbon dynamics during decomposition of 13C-labelled wheat straw and pig slurry. 2007. 72 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2007. |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/5618 |
identifier_str_mv |
LUZ, Laura Patrícia da. Carbon dynamics during decomposition of 13C-labelled wheat straw and pig slurry. 2007. 72 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2007. |
url |
http://repositorio.ufsm.br/handle/1/5618 |
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por |
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por |
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openAccess |
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Universidade Federal de Santa Maria |
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Programa de Pós-Graduação em Ciência do Solo |
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UFSM |
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BR |
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Agronomia |
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Universidade Federal de Santa Maria |
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