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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
20/09/2021 |
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Data da última atualização: |
20/09/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PIRES, L. F.; MACEDO, J. R. de; SOUZA, M. D. de; BACCHI, O. O. S.; REICHARDT, K. |
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Afiliação: |
LUIZ F. PIRES, CENA; JOSE RONALDO DE MACEDO, CNPS; MANOEL DORNELAS DE SOUZA, CNPMA; OSNY O. S. BACCHI, CENA; KLAUS REICHARDT, CENA. |
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Título: |
Gamma-ray computed tomography to characterize soil surface sealing. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Applied Radiation and Isotopes, v. 57, n. 3, p. 375-380, Sept. 2002. |
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DOI: |
https://doi.org/10.1016/S0969-8043(02)00098-2 |
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Idioma: |
Inglês |
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Conteúdo: |
The application of sewage sludge as a fertilizer on soils may cause compacted surface layers (surface sealing), which can promote changes on soil physical properties. The objective of this work was to study the use of gamma-ray computed tomography, as a diagnostic tool for the evaluation of this sealing process through the measurement of soil bulk density distribution of the soil surface layer of samples subjected to sewage sludge application. Tomographic images were taken with a first generation tomograph with a resolution of 1 mm. The image analysis opened the possibility to obtain soil bulk density profiles and average soil bulk densities of the surface layer and to detect the presence of soil surface sealing. The sealing crust thickness was estimated to be in the range of 2-4 mm. |
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Palavras-Chave: |
Gamma-ray transmission. |
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Thesagro: |
Compactação do Solo; Raio Gama; Tomografia. |
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Thesaurus Nal: |
Computed tomography; Soil compaction. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 01568naa a2200253 a 4500
001 2134549
005 2021-09-20
008 2002 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/S0969-8043(02)00098-2$2DOI
100 1 $aPIRES, L. F.
245 $aGamma-ray computed tomography to characterize soil surface sealing.$h[electronic resource]
260 $c2002
520 $aThe application of sewage sludge as a fertilizer on soils may cause compacted surface layers (surface sealing), which can promote changes on soil physical properties. The objective of this work was to study the use of gamma-ray computed tomography, as a diagnostic tool for the evaluation of this sealing process through the measurement of soil bulk density distribution of the soil surface layer of samples subjected to sewage sludge application. Tomographic images were taken with a first generation tomograph with a resolution of 1 mm. The image analysis opened the possibility to obtain soil bulk density profiles and average soil bulk densities of the surface layer and to detect the presence of soil surface sealing. The sealing crust thickness was estimated to be in the range of 2-4 mm.
650 $aComputed tomography
650 $aSoil compaction
650 $aCompactação do Solo
650 $aRaio Gama
650 $aTomografia
653 $aGamma-ray transmission
700 1 $aMACEDO, J. R. de
700 1 $aSOUZA, M. D. de
700 1 $aBACCHI, O. O. S.
700 1 $aREICHARDT, K.
773 $tApplied Radiation and Isotopes$gv. 57, n. 3, p. 375-380, Sept. 2002.
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Registro original: |
Embrapa Solos (CNPS) |
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Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente; Embrapa Pecuária Sudeste. |
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Data corrente: |
10/10/2016 |
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Data da última atualização: |
03/03/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
DEMARCHI, J. J. A. de A.; MANELLA, M. Q.; PRIMAVESI, O. M. A. S. P. R.; FRIGHETTO, R. T. S.; ROMERO, L. A.; BERNDT, A.; LIMA, M. A. de. |
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Afiliação: |
JOÃO JOSÉ ASSUMPÇÃO DE ABREU DEMARCHI, IZ - Nova Odessa; MARCELO DE QUEIROZ MANELLA, Phibro Animal Health; ODO M A S P R PRIMAVESI; ROSA TOYOKO SHIRAISHI FRIGHETTO, CNPMA; LAURA ALEXANDRA ROMERO, FMVZ-USP; ALEXANDRE BERNDT, CPPSE; MAGDA APARECIDA DE LIMA, CNPMA. |
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Título: |
Effect of seasons on enteric methane emissions from cattle grazing Urochloa brizantha. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Journal of Agricultural Science, Toronto, v. 8, n. 4, p. 106-115, 2016. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The objective of this study was to evaluate the effect of seasons under a tropical climate on forage quality, aswell the effect of an Urochloa brizantha cv. Marandu grazing system on enteric methane (CH4) emissions fromNellore cattle in the Southeast region of Brazil. Sixteen Nellore steers (18 months old and initial weight 318.0 ± 116.59 kg of LW; final weight 469 ± 98.50 kg of LW) were used for a trial period of 10 months, with four collection periods in winter (August), spring (December), summer (February) and autumn (May). Each collection period consisted of 28 days, corresponding to the representative month of each season where the last six days were designed for methane data collection. Animals were randomly distributed within 16 experimental plots, distributed in four random blocks over four trial periods. CH4 emissions were determined using the sulphur hexafluoride (SF6) tracer gas technique measured by gas chromatography and fluxes of CH4 calculated. The forage quality was characterized by higher CP and IVDMD and lower lignin contents in spring, differing specially from winter forage. Average CH4 emissions were between 102.49 and 220.91 g d-1 (37.4 to 80.6 kg ani-1 yr-1); 16.89 and 30.20 g kg-1 DMI; 1.35 and 2.90 Mcal ani-1 d-1; 0.18 and 0.57 g kg-1 ADG-1 and 5.05 and 8.76% of GE. Emissions in terms of CO2 equivalents were between 4.68 and 14.22 g CO2-eq-1 g-1 ADG. Variations in CH4 emissions were related to seasonal effect on the forage quality and variations in dry matter intake. MenosAbstract: The objective of this study was to evaluate the effect of seasons under a tropical climate on forage quality, aswell the effect of an Urochloa brizantha cv. Marandu grazing system on enteric methane (CH4) emissions fromNellore cattle in the Southeast region of Brazil. Sixteen Nellore steers (18 months old and initial weight 318.0 ± 116.59 kg of LW; final weight 469 ± 98.50 kg of LW) were used for a trial period of 10 months, with four collection periods in winter (August), spring (December), summer (February) and autumn (May). Each collection period consisted of 28 days, corresponding to the representative month of each season where the last six days were designed for methane data collection. Animals were randomly distributed within 16 experimental plots, distributed in four random blocks over four trial periods. CH4 emissions were determined using the sulphur hexafluoride (SF6) tracer gas technique measured by gas chromatography and fluxes of CH4 calculated. The forage quality was characterized by higher CP and IVDMD and lower lignin contents in spring, differing specially from winter forage. Average CH4 emissions were between 102.49 and 220.91 g d-1 (37.4 to 80.6 kg ani-1 yr-1); 16.89 and 30.20 g kg-1 DMI; 1.35 and 2.90 Mcal ani-1 d-1; 0.18 and 0.57 g kg-1 ADG-1 and 5.05 and 8.76% of GE. Emissions in terms of CO2 equivalents were between 4.68 and 14.22 g CO2-eq-1 g-1 ADG. Variations in CH4 emissions were related to seasonal effect on the forage quality and variat... Mostrar Tudo |
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Palavras-Chave: |
CO2-eq; Enteric methane; Nelore. |
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Thesagro: |
Fermentação; Gado de corte; Gramínea forrageira; Metano; Nutrição animal; Ruminação. |
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Thesaurus NAL: |
Beef cattle; Gas emissions; Methane; Nellore; Sulfur hexafluoride; Urochloa brizantha. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/148565/1/2016AP03.pdf
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Marc: |
LEADER 02579naa a2200373 a 4500
001 2054343
005 2017-03-03
008 2016 bl uuuu u00u1 u #d
100 1 $aDEMARCHI, J. J. A. de A.
245 $aEffect of seasons on enteric methane emissions from cattle grazing Urochloa brizantha.$h[electronic resource]
260 $c2016
520 $aAbstract: The objective of this study was to evaluate the effect of seasons under a tropical climate on forage quality, aswell the effect of an Urochloa brizantha cv. Marandu grazing system on enteric methane (CH4) emissions fromNellore cattle in the Southeast region of Brazil. Sixteen Nellore steers (18 months old and initial weight 318.0 ± 116.59 kg of LW; final weight 469 ± 98.50 kg of LW) were used for a trial period of 10 months, with four collection periods in winter (August), spring (December), summer (February) and autumn (May). Each collection period consisted of 28 days, corresponding to the representative month of each season where the last six days were designed for methane data collection. Animals were randomly distributed within 16 experimental plots, distributed in four random blocks over four trial periods. CH4 emissions were determined using the sulphur hexafluoride (SF6) tracer gas technique measured by gas chromatography and fluxes of CH4 calculated. The forage quality was characterized by higher CP and IVDMD and lower lignin contents in spring, differing specially from winter forage. Average CH4 emissions were between 102.49 and 220.91 g d-1 (37.4 to 80.6 kg ani-1 yr-1); 16.89 and 30.20 g kg-1 DMI; 1.35 and 2.90 Mcal ani-1 d-1; 0.18 and 0.57 g kg-1 ADG-1 and 5.05 and 8.76% of GE. Emissions in terms of CO2 equivalents were between 4.68 and 14.22 g CO2-eq-1 g-1 ADG. Variations in CH4 emissions were related to seasonal effect on the forage quality and variations in dry matter intake.
650 $aBeef cattle
650 $aGas emissions
650 $aMethane
650 $aNellore
650 $aSulfur hexafluoride
650 $aUrochloa brizantha
650 $aFermentação
650 $aGado de corte
650 $aGramínea forrageira
650 $aMetano
650 $aNutrição animal
650 $aRuminação
653 $aCO2-eq
653 $aEnteric methane
653 $aNelore
700 1 $aMANELLA, M. Q.
700 1 $aPRIMAVESI, O. M. A. S. P. R.
700 1 $aFRIGHETTO, R. T. S.
700 1 $aROMERO, L. A.
700 1 $aBERNDT, A.
700 1 $aLIMA, M. A. de
773 $tJournal of Agricultural Science, Toronto$gv. 8, n. 4, p. 106-115, 2016.
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Embrapa Meio Ambiente (CNPMA) |
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