Methane emissions from sheep fed fermented or non-fermented total mixed ration containing whole-crop rice and rice bran

Yang, Cao; Takahashi, Toshiyoshi; Horiguchi, Ken-ich; Yoshida, Norio; Cai, Yimin

doi:10.1016/j.anifeedsci.2010.02.004

Cited by 65 publications

(83 citation statements)

References 19 publications

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“…Matsui et al (2013) reported that supplementing the substrate with 10% raw rice bran affected short-chain fatty acid profiles by significantly increasing the proportion of butyrate and reducing the methanogen density by 25%, compared with the control which resulted in 18% inhibition of methane production after 24-h in vitro incubation. As highlighted earlier, the ground rice hull contained 2% fermentable oligosaccharides that may influence the fermentation pathway to favor the conversion of lactic acid to propionate production (Shinoda et al, 2007;Cao et al, 2010). This probability is supported by results of our previous study that observed lower (P <0.05) acetate/propionate ratio when rice hull and its NDF were used as substrates than when wheat bran and NDF of wheat bran were used in an in vitro experiment (Cao et al, 2013).…”

Section: Discussionsupporting

confidence: 78%

Effect of dietary fiber on the methanogen community in the hindgut of Lantang gilts

Cao

Liang

Liao

et al. 2016

Animal

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The primary objective of this study was to investigate the effect of dietary fiber on methanogenic diversity and community composition in the hindgut of indigenous Chinese Lantang gilts to explain the unexpected findings reported earlier that Lantang gilts fed low-fiber diet (LFD) produced more methane than those fed high-fiber diet (HFD). In total, 12 Lantang gilts (58.7 ± 0.37 kg) were randomly divided into two dietary groups (six replicates (pigs) per group) and fed either LFD (NDF = 201.46 g/kg) or HFD (NDF = 329.70 g/kg). Wheat bran was the main source of fiber for the LFD, whereas ground rice hull (mixture of rice hull and rice bran) was used for the HFD. Results showed that the methanogens in the hindgut of Lantang gilts belonged to four known species (Methanobrevibacter ruminantium, Methanobrevibacter wolinii, Methanosphaera stadtmanae and Methanobrevibacter smithii), with about 89% of the methanogens belonging to the genus Methanobrevibacter. The 16S ribosomal RNA (rRNA) gene copies of Methanobrevibacter were more than three times higher (P < 0.05) for gilts fed LFD (3.31 × 10 9 copies/g dry matter (DM)) than gilts fed HFD (1.02 × 10 9 copies/g DM). No difference (P > 0.05) was observed in 16S rRNA gene copies of Fibrobacter succinogenes between the two dietary groups, and 18S rRNA gene copies of anaerobic fungi in gilts fed LFD were lower than (P < 0.05) those fed HFD. To better explain the effect of different fiber source on the methanogen community, a follow-up in vitro fermentation using a factorial design comprised of two inocula (prepared from hindgut content of gilts fed two diets differing in their dietary fiber) × four substrates (LFD, HFD, wheat bran, ground rice hull) was conducted. Results of the in vitro fermentation confirmed that the predominant methanogens belonged to the genus of Methanobrevibacter, and about 23% methanogens was found to be distantly related (90%) to Thermogymnomonas acidicola. In vitro fermentation also seems to suggest that fiber source did change the methanogens community. Although the density of Methanobrevibacter species was positively correlated with CH 4 production in both in vivo (P < 0.01, r = 0.737) and in vitro trials (P < 0.05, r = 0.854), which could partly explain the higher methane production from gilts fed LFD compared with those in the HFD group. Further investigation is needed to explain how the rice hull affected the methanogens and inhibited CH 4 emission from gilts fed HFD.

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Section: Discussionsupporting

confidence: 78%

Effect of dietary fiber on the methanogen community in the hindgut of Lantang gilts

Cao

Liang

Liao

et al. 2016

Animal

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“…April 2016 | Volume 4 | Issue 4 | Page 181 (Cao et al, 2010a), which possibly links greater fiber digestion in the rumen. As described above, rumen methane production is generally higher when more fibrous feed is applied to cattle (Dehority, 2003a).…”

Section: Advances In Animal and Veterinary Sciencesmentioning

confidence: 99%

“…Studies on eTMR have increased in recent years, particularly in Asian counties that are usually in humid climate (Nishino et al, 2004;Wang and Nishino, 2008;Weinberg et al, 2011). Recently, it was reported that eTMR using whole-crop rice and rice bran leads to low methane production in vitro and in vivo, compared to TMR which was not ensiled (Cao et al, 2010a;Cao et al, 2012), resulting in the decrease of feed energy loss. Methane production in ruminants has attracted a great deal of attention in relation to the consequential decrease in feed efficiency and to its contribution to the greenhouse gas effect and global warming (Eckard et al, 2010).…”

mentioning

confidence: 99%

Changes in in vitro Rumen Fermentation Characteristics of Different Compositions of Total Mixed Rations (TMR) and the Ensiled TMRs

Wang¹

2016

Adv. Anim. Vet. Sci.

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| To evaluate the effects of the composition of total mixed rations (TMR) and ensiling of the TMR on rumen fermentation properties and methane production, we compared two types of TMRs, which were optimized for dairy cattle and beef cattle, and their ensiled TMRs (eTMR). To make eTMRs, TMRs were wrapped and fermented for 40 days. These eTMRs and TMRs were used for in vitro ruminal incubation experiment. The type of TMR and ensiling both affected total short chain fatty acids, the amount of methane production, and relative proportions of acetate and butyrate in the in vitro rumen cultures of tested TMRs. The relative abundance methanogenic archaea in respective cultures determined by quantifying a gene involved in methane production (mcrA: α-subunit of methyl co-enzyme M reductase) was also affected by both the type and the ensiling, which was higher in the eTMRs than the TMRs (p<0.001). The results of the present study suggest that not only ensiling TMR but also the composition of TMR may affect in vitro rumen fermentation patterns, and that changes in the degree of methane generation due to ensiling TMR may also depend on the fermentation kinetics.

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“…Fermented TMR has lower ruminal methane emission in sheep than non-fermented TMR that contains whole-crop rice and rice bran as reported by Cao et al (2010). Previously in vitro study by Cao et al (2009) showed that supplementation with lactic acid bacteria to TMR silage containing whole-crop rice and 30% of rice bran has lower methane production per digestible dry matter than in control.…”

confidence: 51%

Agricultural by-Products as Feed for Ruminants in Tropical Area: Nutritive Value and Mitigating Methane Emission

Yanti

Yayota

2017

RAS

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Methane emissions from sheep fed fermented or non-fermented total mixed ration containing whole-crop rice and rice bran

Cited by 65 publications

References 19 publications

Effect of dietary fiber on the methanogen community in the hindgut of Lantang gilts

Effect of dietary fiber on the methanogen community in the hindgut of Lantang gilts

Changes in in vitro Rumen Fermentation Characteristics of Different Compositions of Total Mixed Rations (TMR) and the Ensiled TMRs

Agricultural by-Products as Feed for Ruminants in Tropical Area: Nutritive Value and Mitigating Methane Emission

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