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Oikawa K, Kim M, Terada F, Masaki T, Yasuda Y, Shiroshita Y, Ideo T, Kamiya Y, Suzuki T. Variation among individual beef cattle in methane-to-carbon dioxide ratio measured under on-farm conditions using the sniffer method. Anim Sci J 2024; 95:e13916. [PMID: 38286760 DOI: 10.1111/asj.13916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 12/03/2023] [Accepted: 01/09/2024] [Indexed: 01/31/2024]
Abstract
This study proposed a method for measuring the methane (CH4 )/carbon dioxide (CO2 ) ratio from individual beef cattle under on-farm conditions and estimated the variance components of the CH4 /CO2 ratio. Gas measurements were conducted using 166 Japanese Black cattle group-housed in pens equipped with individual feed bins. The gas containing the animal's breath was measured individually after concentrate feeding by covering the feed bin with a sheet with sampling inlets. Measurements were performed six times (three consecutive days, twice daily) per individual. Most of the sampled gas contained more than 1000 ppm of the mean background-corrected CO2 , suggesting that the method proposed in this study successfully collected sufficient breath concentration to accurately measure the CH4 /CO2 ratio. The between-animal variance accounted for 31.7% of the total variance in the CH4 /CO2 ratio. The results showed that the gas collection method proposed in this study could be a useful tool for measuring the CH4 /CO2 ratio under on-farm conditions. The variance component obtained from this study will help to establish protocols for generating data for genetic evaluation and performing dietary experiments with sufficient statistical power.
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Affiliation(s)
- Kohei Oikawa
- Institute of Livestock and Grassland Science, NARO, Nasushiobara, Tochigi, Japan
| | - Minji Kim
- Institute of Livestock and Grassland Science, NARO, Tsukuba, Ibaraki, Japan
| | - Fuminori Terada
- Institute of Livestock and Grassland Science, NARO, Tsukuba, Ibaraki, Japan
| | - Tatsunori Masaki
- Hyogo Prefectural Technology Center of Agriculture, Forestry and Fisheries, Kasai, Hyogo, Japan
| | - Yaichirou Yasuda
- Hyogo Prefectural Technology Center of Agriculture, Forestry and Fisheries, Kasai, Hyogo, Japan
| | - Yoshikazu Shiroshita
- Hyogo Prefectural Technology Center of Agriculture, Forestry and Fisheries, Asago, Hyogo, Japan
| | - Takahiro Ideo
- Hyogo Prefectural Technology Center of Agriculture, Forestry and Fisheries, Asago, Hyogo, Japan
| | - Yuko Kamiya
- Institute of Livestock and Grassland Science, NARO, Nasushiobara, Tochigi, Japan
| | - Tomoyuki Suzuki
- Institute of Livestock and Grassland Science, NARO, Nasushiobara, Tochigi, Japan
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