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https://hdl.handle.net/1959.11/21889
Title: | The effect of incremental levels of dietary nitrate on methane emissions in Holstein steers and performance in Nelore bulls | Contributor(s): | Newbold, J R (author); van Zijderveld, S M (author); Hulshof, R B A (author); Fokkink, W B (author); Leng, Ronald (author); Terencio, P (author); Powers, W J (author); van Adrichem, P S J (author); Paton, N D (author); Perdok, H B (author) | Publication Date: | 2014 | DOI: | 10.2527/jas.2014-7677 | Handle Link: | https://hdl.handle.net/1959.11/21889 | Abstract: | Two experiments were conducted to study effects of dietary nitrate on enteric methane production, blood methemoglobin concentration, and growth rate in cattle. In Exp. 1, 36 Holstein steers (288 ± 25 kg BW) were fed increasing levels of dietary nitrate (6 levels; 0 to 3.0% of feed DM) in corn silage–based total mixed rations. Nitrate was introduced gradually in a 25-d adaptation period before methane production was determined in environmentally controlled rooms. In the rooms, feed intake was restricted and similar among all treatments. Methane production (g/d) decreased linearly as dietary nitrate concentration increased (P <0.01). The apparent efficiency (measured methane reduction divided by potential methane reduction) with which enteric methane was mitigated was 49%. Blood methemoglobin levels increased with increasing nitrate dose. In Exp 2, 300 Nelore bulls (392 ± 28 kg) were fed increasing levels of nitrate (6 levels; 0 to 2.4% of feed DM) in highconcentrate total mixed rations offered ad libitum. Feed intake decreased linearly with increasing level of dietary nitrate(P <0.01). However, ADG was not affected by nitrate dose (P = 0.54), resulting in a linear improvement in G:F (P = 0.03) as dietary nitrate level increased. Carcass dressing percentage showed a quadratic response to incremental dietary nitrate, reaching the highest value at 0.96% of NO3/kg DM (P = 0.04). | Publication Type: | Journal Article | Source of Publication: | Journal of Animal Science, 92(11), p. 5032-5040 | Publisher: | American Society of Animal Science | Place of Publication: | United States of America | ISSN: | 1525-3163 0021-8812 |
Fields of Research (FoR) 2008: | 070204 Animal Nutrition | Fields of Research (FoR) 2020: | 300303 Animal nutrition | Socio-Economic Objective (SEO) 2008: | 839802 Management of Greenhouse Gas Emissions from Animal Production | Socio-Economic Objective (SEO) 2020: | 190302 Management of greenhouse gas emissions from animal production | Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
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Appears in Collections: | Journal Article |
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