| Registro completo |
| Provedor de dados: |
R. Bras. Zootec.
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| País: |
Brazil
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| Título: |
Relationship between residual feed intake and enteric methane emission in Nellore cattle
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| Autores: |
Mercadante,Maria Eugênia Zerlotti
Caliman,Ana Paula de Melo
Canesin,Roberta Carrilho
Bonilha,Sarah Figueiredo Martins
Berndt,Alexandre
Frighetto,Rosa Toyoko Shiraishi
Magnani,Elaine
Branco,Renata Helena
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| Data: |
2015-07-01
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| Ano: |
2015
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| Palavras-chave: |
Beef cattle
Enteric methane production
Feed efficiency
Performance
Sulfur hexafluoride
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| Resumo: |
Feed intake and average daily gain (ADG) in Nellore cattle were determined to calculate residual feed intake in two performance tests: first during the growth phase (RFIgrowth) and then during a measurement of the methane emission phase (RFImet). During the RFIgrowth test, 62 males and 56 females were classified as low-, medium-, and high-RFI. Enteric methane emission was measured in 46 animals; 23 males used for RFImet measurement plus 23 females (22 low-RFIgrowth and 24 high-RFIgrowth). Diet consisted of Brachiaria brizantha cv. Marandu hay (445 g/kg DM) and concentrate (555 g/kg DM). During the RFIgrowth and RFImet phases, DMI was lower in the animals with low RFI, with no difference in ADG. Residual feed intake was -0.359 and 0.367 kg DM/d for low- and high-RFI animals. Enteric methane emission (g/d, g/kg BW0.75 and g/kg ADG) did not differ between RFIgrowth classes. Enteric methane emission (g/d) was higher in high RFImet and lower in low RFImet males. Spearman correlations among traits obtained during both tests, which were high between metabolic BW (r = 0.959) and between DMI (r = 0.718), and zero between ADG (r = -0.062), resulted in moderate correlation between RFIgrowth and RFImet (r = 0.412). However, it is not possible to confirm that high-efficiency animals release less enteric methane, since different results were obtained when enteric methane was compared between the RFIgrowth and RFImet classes.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000700255
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| Editor: |
Sociedade Brasileira de Zootecnia
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| Relação: |
10.1590/S1806-92902015000700004
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Zootecnia v.44 n.7 2015
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| Direitos: |
info:eu-repo/semantics/openAccess
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