Relationship between residual feed intake and daily methane emission in young Nellore bulls / Relação entre consumo alimentar residual e emissão diária de metano em novilhos Nelore
Paula Melo Caliman, Ana; Magnani, Elaine; Berndt, Alexandre; Toyoko Shiraishi Frighetto, Rosa; Helena Branco, Renata; Eugênia Zerlotti Mercadante, Maria.
B. Indústr. Anim.;
69: 31-31, 2012.
Artigo
em Português
| VETINDEX
| ID: vti-467789
Resumo
The cattle production is a sector of agricultural activity that has impact on global warming due to enteric fermentation from digestive process that releases methane (CH4), with energy loss of food and consequent inefficiency of system. Residual feed intake (RFI) is a feed efficiency trait defined as the difference between actual feed intake and the one predicted on the basis of requirements for body weight production and maintenance. There are evidences that more efficient cattle (low RFI) have lower methane daily emissions than less efficient cattle (high RFI). This study aimed to evaluate the pattern of CH4 daily emission and its relationship with RFI obtained during the CH4 collection in Nelore previously evaluated for this trait. A sample of 23 from 62 young bulls, previously classified into low RFI72 and high RFI72 in the 72-days performance test (RFI72), were evaluated. After the 72-days test, the individual feed intake was recorded for a further 45 days. Another RFI was obtained from the last 32 days (RFI32), and the animals were classified into two RFI32 classes: below zero (low RFI32) and above zero (high RFI32). CH4 daily emissions of each animal were collected during the last 7 days of this period, being preceded by 7 days for adaptation of animals to the collection apparatus. The sulfur hexafluoride (SF6) tracer technique was used for estimating enteric methane emiO artigo não apresenta resumo em português.
Biblioteca responsável:
BR68.1
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