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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
09/01/2019 |
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Data da última atualização: |
09/01/2019 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
CONGIO, G. F. S.; CHIAVEGATO, M. B.; BATALHA, C. D. A.; BERNDT, A.; FRIGHETTO, R. T. S.; SILVA, S. C. da. |
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Afiliação: |
Guilhermo F. de. S. Congio, USP; Marília B. Chiavegato, pós-doctouranda USP; Camila D. A. Batalha, USP; ALEXANDRE BERNDT, CPPSE; ROSA TOYOKO SHIRAISHI FRIGHETTO, CNPMA; Sila C. da Silva, USP. |
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Título: |
Effect of grazing frequency on enteric methane emissions, output of milk constituents and milk yield. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 54., 2017, Foz do Iguaçu, PR. Proceedings... Foz do Iguaçu, PR: SBZ, 2017. |
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Páginas: |
p. 587. |
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Idioma: |
Português |
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Conteúdo: |
Grazing management changes sward structure, affecting forage morphological characteristics and nutritive value, and ultimately animal performance and enteric methane (CH4) emissions. The objective of this study was to evaluate enteric methane emissions and animal performance of lactating dairy cows grazing elephant grass (Pennisetum purpureum Schum. cv. Cameroon). Treatments corresponded to strategies of rotational grazing characterized by two pre-grazing targets; 95% and maximum canopy light interception (LI95% and LIMax, respectively). Post-grazing target corresponded to 50% of the pre-grazing targets. Twenty-two midlactation Holstein × Jersey cows (488 ± 60 kg) were stratified by body weight, days in milk (126 ± 90 days), lactation number (2.3 ± 1.2), and daily milk yield (20.3 ± 2.6 kg d-1) in a completely randomized design (n = 11). The 2.5 ha experimental area was divided into two sets of 18 paddocks (700 m2). Concentrate was offered twice daily before milking based on the average milk production of each group (1 kg of concentrate:3 kg of milk). Enteric CH4 emissions were collected using the sulfur hexafluoride (SF6) tracer gas method. Dry matter intake (DMI) was determined using titanium dioxide as a marker. Sampling occurred during the grazing season from December 2015 to April 2016. Results were analyzed using the PROC MIXED of SAS (? = 0.05). There were no treatment effects on DMI (18.4 kg d-1, on average; P = 0.090) nor on daily CH4 emissions (304.9 g d-1 on average; P = 0.136). Therefore, there were no treatment effects on enteric CH4 emissions per unit of feed consumed (17.3 g CH4 kg DMI-1). However, cows grazing LI95% swards had greater milk (17.5 vs 14.6 kg d-1; P = 0.043), protein (0.55 vs 0.47 kg d-1; P = 0.029), fat (0.66 vs 0.55 kg d-1; P = 0.027), and milk solids yield (2.15 vs 1.79 kg d-1; P = 0.019). Consequently, the LI95% target resulted in lower enteric CH4 emissions per unit of milk produced (16.7 vs 23.4 g CH4 L-1, P = 0.002), per unit of milk protein (528.1 vs 703.5 g CH4 kg-1; P = 0.003), per unit of milk fat (437.9 vs 606.5 g CH4 kg-1; P = 0.001), and per unit of milk solids yield (135.2 vs 186.1 g CH4 kg-1; P = 0.001). Grazing management based on the LI95% pre-grazing target resulted in increased output of milk constituents and milk yield, whilst reducing CH4 emissions per unit of final product. These results are likely associated with increased forage nutritive value in LI95% swards, since no effects of pre-grazing targets were observed on DMI. MenosGrazing management changes sward structure, affecting forage morphological characteristics and nutritive value, and ultimately animal performance and enteric methane (CH4) emissions. The objective of this study was to evaluate enteric methane emissions and animal performance of lactating dairy cows grazing elephant grass (Pennisetum purpureum Schum. cv. Cameroon). Treatments corresponded to strategies of rotational grazing characterized by two pre-grazing targets; 95% and maximum canopy light interception (LI95% and LIMax, respectively). Post-grazing target corresponded to 50% of the pre-grazing targets. Twenty-two midlactation Holstein × Jersey cows (488 ± 60 kg) were stratified by body weight, days in milk (126 ± 90 days), lactation number (2.3 ± 1.2), and daily milk yield (20.3 ± 2.6 kg d-1) in a completely randomized design (n = 11). The 2.5 ha experimental area was divided into two sets of 18 paddocks (700 m2). Concentrate was offered twice daily before milking based on the average milk production of each group (1 kg of concentrate:3 kg of milk). Enteric CH4 emissions were collected using the sulfur hexafluoride (SF6) tracer gas method. Dry matter intake (DMI) was determined using titanium dioxide as a marker. Sampling occurred during the grazing season from December 2015 to April 2016. Results were analyzed using the PROC MIXED of SAS (? = 0.05). There were no treatment effects on DMI (18.4 kg d-1, on average; P = 0.090) nor on daily CH4 emissions (304.9 g d-1 on avera... Mostrar Tudo |
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Palavras-Chave: |
Light interception. |
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Thesagro: |
Metano; Pennisetum Purpureum; Vaca Leiteira. |
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Thesaurus Nal: |
Dairy cows; Emissions; Methane; Pennisetum. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/190029/1/RA-FrighettoRTS-54-RASBZ-2017-p587.pdf
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Marc: |
LEADER 03403nam a2200277 a 4500
001 2103344
005 2019-01-09
008 2018 bl uuuu u00u1 u #d
100 1 $aCONGIO, G. F. S.
245 $aEffect of grazing frequency on enteric methane emissions, output of milk constituents and milk yield.$h[electronic resource]
260 $aIn: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 54., 2017, Foz do Iguaçu, PR. Proceedings... Foz do Iguaçu, PR: SBZ$c2017
300 $ap. 587.
520 $aGrazing management changes sward structure, affecting forage morphological characteristics and nutritive value, and ultimately animal performance and enteric methane (CH4) emissions. The objective of this study was to evaluate enteric methane emissions and animal performance of lactating dairy cows grazing elephant grass (Pennisetum purpureum Schum. cv. Cameroon). Treatments corresponded to strategies of rotational grazing characterized by two pre-grazing targets; 95% and maximum canopy light interception (LI95% and LIMax, respectively). Post-grazing target corresponded to 50% of the pre-grazing targets. Twenty-two midlactation Holstein × Jersey cows (488 ± 60 kg) were stratified by body weight, days in milk (126 ± 90 days), lactation number (2.3 ± 1.2), and daily milk yield (20.3 ± 2.6 kg d-1) in a completely randomized design (n = 11). The 2.5 ha experimental area was divided into two sets of 18 paddocks (700 m2). Concentrate was offered twice daily before milking based on the average milk production of each group (1 kg of concentrate:3 kg of milk). Enteric CH4 emissions were collected using the sulfur hexafluoride (SF6) tracer gas method. Dry matter intake (DMI) was determined using titanium dioxide as a marker. Sampling occurred during the grazing season from December 2015 to April 2016. Results were analyzed using the PROC MIXED of SAS (? = 0.05). There were no treatment effects on DMI (18.4 kg d-1, on average; P = 0.090) nor on daily CH4 emissions (304.9 g d-1 on average; P = 0.136). Therefore, there were no treatment effects on enteric CH4 emissions per unit of feed consumed (17.3 g CH4 kg DMI-1). However, cows grazing LI95% swards had greater milk (17.5 vs 14.6 kg d-1; P = 0.043), protein (0.55 vs 0.47 kg d-1; P = 0.029), fat (0.66 vs 0.55 kg d-1; P = 0.027), and milk solids yield (2.15 vs 1.79 kg d-1; P = 0.019). Consequently, the LI95% target resulted in lower enteric CH4 emissions per unit of milk produced (16.7 vs 23.4 g CH4 L-1, P = 0.002), per unit of milk protein (528.1 vs 703.5 g CH4 kg-1; P = 0.003), per unit of milk fat (437.9 vs 606.5 g CH4 kg-1; P = 0.001), and per unit of milk solids yield (135.2 vs 186.1 g CH4 kg-1; P = 0.001). Grazing management based on the LI95% pre-grazing target resulted in increased output of milk constituents and milk yield, whilst reducing CH4 emissions per unit of final product. These results are likely associated with increased forage nutritive value in LI95% swards, since no effects of pre-grazing targets were observed on DMI.
650 $aDairy cows
650 $aEmissions
650 $aMethane
650 $aPennisetum
650 $aMetano
650 $aPennisetum Purpureum
650 $aVaca Leiteira
653 $aLight interception
700 1 $aCHIAVEGATO, M. B.
700 1 $aBATALHA, C. D. A.
700 1 $aBERNDT, A.
700 1 $aFRIGHETTO, R. T. S.
700 1 $aSILVA, S. C. da
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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| Registros recuperados : 203 | |
| 4. |  | VALARINI, P. J.; FRIGHETTO, R. T. S.; ODA, L. M. Avaliação integrada da capacidade produtiva do solo sob manejo orgânico. REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 26.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 10.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 8.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 5., 2004, Lages. Avaliação das conquistas: base para estratégias futuras. Lages: SBCS, 2004. 1 CD ROM| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| 10. | | VALARINI, P. J.; FRIGHETTO, R. T. S.; SCHIAVINATO, R. J. Indução de resistência sistêmica do tomateiro a doenças no sistema de manejo orgânico. Summa Phytopathologica, Botucatu v. 30, n. 1, p. 114, jan./mar. 2004. Resumo. Trabalho apresentado no 27º Congresso Paulista de Fitopatologia, 2003, Botucatu. Resumo. Trabalho apresentado no 27º Congresso Paulista de Fitopatologia, 2003, Botucatu.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| 17. | | VALARINI, P. J.; FRIGHETTO, R. T. S.; SOUZA, M. D. de; RODRIGUES, G. S.; CAMPANHOLA, C. Aplicabilidade do módulo complementar "Capacidade produtiva do solo" do método APOIA-Novo Rural. In: CONGRESSO BRASILEIRO DE AGROECOLOGIA, 1; SEMINÁRIO INTERNACIONAL SOBRE AGROECOLOGIA, 4; SEMINÁRIO ESTADUAL SOBRE AGROECOLOGIA, 5., 2003, Porto Alegre. Anais.. Porto Alegre: EMATER/RS-ASCAR, 2003.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| 20. | | RAMOS FILHO, L. O.; RODRIGUES, I.; FRIGHETTO, R. T. S.; CAMPANHOLA, C.; BROMBAL, J. C. Aplicação do sistema "apoia-novorural" para avaliação do desempenho ambiental do agroturismo. Cadernos de Ciência & Tecnologia, Brasília, v.21, n. 3, p.409-423, set./dez. 2004.| Biblioteca(s): Embrapa Unidades Centrais. |
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| Registros recuperados : 203 | |
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