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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
25/04/2003 |
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Data da última atualização: |
23/02/2012 |
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Autoria: |
JORGE, L. A. C.; MACEDO, A.; GUIMARÃES, M. F.; MARTINS, M. D. C. |
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Afiliação: |
Embrapa Instrumentação Agropecuária, São Carlos, SP; Universidade Estadual de Londrina, Londrina, PR. |
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Título: |
Mathematical morphology applied to soil pore and aggregate characterization. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
In: WORLD CONGRESS OF COMPUTERS IN AGRICULTURE AND NATURAL RESOURCES, 2001, Iguaçu Falls. Proceedings... St. Joseph: American Society of Agricultural Engineers, 2001. |
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Páginas: |
p. 36-41. |
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Idioma: |
Inglês |
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Notas: |
Edited by Fedro Zazueta, Jiannong Xin. |
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Conteúdo: |
In this work the mathematical morphology applied to soil pore and aggregate characterization is presented. It is based on binary granulometry and shape analysis. The measurement associated with this granulometry is based on the computation of the contributing non-zero points in the reconstructed image instead of the volume measurement commonly used. A round structuring element with varying radius was used. This radius variation provided the pore and aggregate size distribution in a single graphic. Images of soil photomicrographs from two different areas were used: the native forest and the crop area. The soil pore and aggregate morphology were observed, and analyzed, and compared with manual evaluation. The preliminary results and discussion on the challenge to improve such methods are also presented. |
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Palavras-Chave: |
Agregate; Granulometry; Mathematical morphology; Morfologia. |
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Thesagro: |
Granulometria; Porosidade; Solo. |
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Thesaurus Nal: |
porosity; soil. |
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Categoria do assunto: |
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Marc: |
LEADER 01703naa a2200289 a 4500
001 1024611
005 2012-02-23
008 2002 bl --- 0-- u #d
100 1 $aJORGE, L. A. C.
245 $aMathematical morphology applied to soil pore and aggregate characterization.
260 $c2002
300 $ap. 36-41.
500 $aEdited by Fedro Zazueta, Jiannong Xin.
520 $aIn this work the mathematical morphology applied to soil pore and aggregate characterization is presented. It is based on binary granulometry and shape analysis. The measurement associated with this granulometry is based on the computation of the contributing non-zero points in the reconstructed image instead of the volume measurement commonly used. A round structuring element with varying radius was used. This radius variation provided the pore and aggregate size distribution in a single graphic. Images of soil photomicrographs from two different areas were used: the native forest and the crop area. The soil pore and aggregate morphology were observed, and analyzed, and compared with manual evaluation. The preliminary results and discussion on the challenge to improve such methods are also presented.
650 $aporosity
650 $asoil
650 $aGranulometria
650 $aPorosidade
650 $aSolo
653 $aAgregate
653 $aGranulometry
653 $aMathematical morphology
653 $aMorfologia
700 1 $aMACEDO, A.
700 1 $aGUIMARÃES, M. F.
700 1 $aMARTINS, M. D. C.
773 $tIn: WORLD CONGRESS OF COMPUTERS IN AGRICULTURE AND NATURAL RESOURCES, 2001, Iguaçu Falls. Proceedings... St. Joseph: American Society of Agricultural Engineers, 2001.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
03/04/2019 |
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Data da última atualização: |
20/11/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
GRANJA-SALCEDO, Y. T.; FERNANDES, R. M.; ARAUJO, R. C. de; KISHI, L. T.; BERCHIELLI, T. T.; RESENDE, F. D. de; BERNDT, A.; SIQUEIRA, G. R. |
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Afiliação: |
Yury Tatiana Granja-Salcedo, UNESP; Rodolfo Maciel Fernandes, UNESP/Agência Paulista de Tecnologia dos Agronegócios; Rafael Canonenco de Araujo, GRASP; Luciano Takeshi Kishi, UNESP; Telma Teresinha Berchielli, UNESP; Flávio Dutra de Resende, UNESP; ALEXANDRE BERNDT, CPPSE; Gustavo Rezende Siqueira, UNESP/Agência Paulista de Tecnologia dos Agronegócios. |
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Título: |
Long-Term encapsulated nitrate supplementation modulates rumen microbial diversity and rumen fermentation to reduce methane emission in grazing steers. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Frontiers in microbiology, v. 10, n. 614, p. 1-12, 2019. |
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Idioma: |
Inglês |
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Conteúdo: |
This study investigated the long-term effects (13 months) of encapsulated nitrate supplementation (ENS) on enteric methane emissions, rumen fermentation parameters, ruminal bacteria, and diversity of archaea in grazing beef cattle. We used a total of thirty-two Nellore steers (initial BW of 197 15.3 kg), 12 of which were fitted with rumen cannulas. For 13 months, the animals were maintained in 12 paddocks and fed a concentrate of ground corn, soybean meals, mineral supplements, and urea (URS) or encapsulated nitrate (EN) containing 70 g of EN/100 kg of BW (corresponding to 47 g NO3/100 kg BW). Encapsulated nitrate supplementation resulted in similar forage, supplement and total DMI values as URS (P > 0.05), but ENS tended to increase (C48 g/d; P = 0.055) average daily weight gain. Daily reductions in methane emissions (- 9.54 g or 18.5%) were observed with ENS when expressed as g of CH4/kg of forage dry matter intake (fDMI) (P = 0.037). Lower concentrations of NH3-N and a higher ruminal pH were observed in ENS groups 6 h after supplementation (P < 0.05). Total VFA rumen concentration 6 h (P = 0.009) and 12 h after supplementation with EN resulted in lower acetate concentrations in the rumen (P = 0.041). Steers supplemented with EN had a greater ruminal abundance of Bacteroides, Barnesiella, Lactobacillus, Selenomonas, Veillonella, Succinimonas, Succinivibrio, and Duganella sp. (P < 0.05), but a lower abundance of Methanobrevibacter sp. (P = 0.007). Strong negative correlations were found between daily methane emissions and Proteobacteria, Erysipelotrichaceae, Prevotellaceae, and Roseburia, Kandleria, Selenomonas, Veillonella, and Succinivibrio sp. (P < 0.05) in the rumen of ENS steers. Encapsulated nitrate is a feed additive that persistently affects enteric methane emission in grazing steers, thereby decreasing Methanobrevibacter abundance in the rumen. In addition, ENS can promote fumarate-reducer and lactateproducer bacteria, thereby reducing acetate production during rumen fermentation. MenosThis study investigated the long-term effects (13 months) of encapsulated nitrate supplementation (ENS) on enteric methane emissions, rumen fermentation parameters, ruminal bacteria, and diversity of archaea in grazing beef cattle. We used a total of thirty-two Nellore steers (initial BW of 197 15.3 kg), 12 of which were fitted with rumen cannulas. For 13 months, the animals were maintained in 12 paddocks and fed a concentrate of ground corn, soybean meals, mineral supplements, and urea (URS) or encapsulated nitrate (EN) containing 70 g of EN/100 kg of BW (corresponding to 47 g NO3/100 kg BW). Encapsulated nitrate supplementation resulted in similar forage, supplement and total DMI values as URS (P > 0.05), but ENS tended to increase (C48 g/d; P = 0.055) average daily weight gain. Daily reductions in methane emissions (- 9.54 g or 18.5%) were observed with ENS when expressed as g of CH4/kg of forage dry matter intake (fDMI) (P = 0.037). Lower concentrations of NH3-N and a higher ruminal pH were observed in ENS groups 6 h after supplementation (P < 0.05). Total VFA rumen concentration 6 h (P = 0.009) and 12 h after supplementation with EN resulted in lower acetate concentrations in the rumen (P = 0.041). Steers supplemented with EN had a greater ruminal abundance of Bacteroides, Barnesiella, Lactobacillus, Selenomonas, Veillonella, Succinimonas, Succinivibrio, and Duganella sp. (P < 0.05), but a lower abundance of Methanobrevibacter sp. (P = 0.007). Strong negative correlatio... Mostrar Tudo |
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Palavras-Chave: |
Archaea diversity; Enteric methane emission. |
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Thesagro: |
Gado de Corte; Nitrato. |
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Thesaurus NAL: |
Beef cattle; Fatty acids; Rumen bacteria. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/195343/1/Long-Term-Encapsulated-Nitrate.pdf
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Marc: |
LEADER 02933naa a2200289 a 4500
001 2107883
005 2019-11-20
008 2019 bl uuuu u00u1 u #d
100 1 $aGRANJA-SALCEDO, Y. T.
245 $aLong-Term encapsulated nitrate supplementation modulates rumen microbial diversity and rumen fermentation to reduce methane emission in grazing steers.$h[electronic resource]
260 $c2019
520 $aThis study investigated the long-term effects (13 months) of encapsulated nitrate supplementation (ENS) on enteric methane emissions, rumen fermentation parameters, ruminal bacteria, and diversity of archaea in grazing beef cattle. We used a total of thirty-two Nellore steers (initial BW of 197 15.3 kg), 12 of which were fitted with rumen cannulas. For 13 months, the animals were maintained in 12 paddocks and fed a concentrate of ground corn, soybean meals, mineral supplements, and urea (URS) or encapsulated nitrate (EN) containing 70 g of EN/100 kg of BW (corresponding to 47 g NO3/100 kg BW). Encapsulated nitrate supplementation resulted in similar forage, supplement and total DMI values as URS (P > 0.05), but ENS tended to increase (C48 g/d; P = 0.055) average daily weight gain. Daily reductions in methane emissions (- 9.54 g or 18.5%) were observed with ENS when expressed as g of CH4/kg of forage dry matter intake (fDMI) (P = 0.037). Lower concentrations of NH3-N and a higher ruminal pH were observed in ENS groups 6 h after supplementation (P < 0.05). Total VFA rumen concentration 6 h (P = 0.009) and 12 h after supplementation with EN resulted in lower acetate concentrations in the rumen (P = 0.041). Steers supplemented with EN had a greater ruminal abundance of Bacteroides, Barnesiella, Lactobacillus, Selenomonas, Veillonella, Succinimonas, Succinivibrio, and Duganella sp. (P < 0.05), but a lower abundance of Methanobrevibacter sp. (P = 0.007). Strong negative correlations were found between daily methane emissions and Proteobacteria, Erysipelotrichaceae, Prevotellaceae, and Roseburia, Kandleria, Selenomonas, Veillonella, and Succinivibrio sp. (P < 0.05) in the rumen of ENS steers. Encapsulated nitrate is a feed additive that persistently affects enteric methane emission in grazing steers, thereby decreasing Methanobrevibacter abundance in the rumen. In addition, ENS can promote fumarate-reducer and lactateproducer bacteria, thereby reducing acetate production during rumen fermentation.
650 $aBeef cattle
650 $aFatty acids
650 $aRumen bacteria
650 $aGado de Corte
650 $aNitrato
653 $aArchaea diversity
653 $aEnteric methane emission
700 1 $aFERNANDES, R. M.
700 1 $aARAUJO, R. C. de
700 1 $aKISHI, L. T.
700 1 $aBERCHIELLI, T. T.
700 1 $aRESENDE, F. D. de
700 1 $aBERNDT, A.
700 1 $aSIQUEIRA, G. R.
773 $tFrontiers in microbiology$gv. 10, n. 614, p. 1-12, 2019.
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Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
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