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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2020.1
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- 1 - 13 (13page)
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This study was designed to evaluate the in vitro and in vivo effects of reductive acetogens isolated from ruminants on methane mitigation, and milk performance, respectively. Four acetogens, Proteiniphilum acetatigenes DA02, P. acetatigenes GA01, Alkaliphilus crotonatoxidans GA02, and P. acetatigenes GA03 strains were isolated from ruminants and used in in vitro experiment. A control (without acetogen) and a positive group (with Eubacterium limosum ATCC 8486) were also included in in vitro experiment. Based on higher acetate as well as lower methane producing ability in in vitro trial, P. acetatigenes GA03 was used as inoculum for in vivo experiment. Holstein dairy cows (n = 14) were divided into two groups viz. control (without) and GA03 group (diet supplied with P. acetatigenes GA03 at a feed rate of 1% supplementation). Milk performance and blood parameters were checked for both groups. In in vitro, the total volatile fatty acids and acetate production were higher (p < 0.05) in all 4 isolated acetogens than the control and positive treatment. Also, all acetogens significantly lowered (p < 0.05) methane production in comparison to positive and control groups however, GA03 had the lowest (p < 0.05) methane production among 4 isolates. In in vivo, the rate of milk yield reduction was higher (p < 0.05) in the control than GA03 treated group (5.07 vs 2.4 kg). Similarly, the decrease in milk fat was also higher in control (0.14% vs 0.09%) than treatment. The somatic cell counts (SCC; ×103/mL) was decreased from 128.43 to 107.00 in acetogen treated group however, increased in control from 138.14 to 395.71. In addition, GA03 increased blood glucose and decreased non-esterified fatty acids. Our results suggest that the isolated acetogens have the potential for in vitro methane reduction and P. acetatigenes GA03 strain could be a candidate probiotic strain for improving milk yield and milk fat in lactating cows with lowering SCCs.
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참고문헌 (33)
참고문헌 신청
Beauchemin KA / 2005 / Methane emissions from feedlot cattle fed barley or corn diets / J Anim Sci 83:653~661
Johnson KA / 1995 / Methane emissions from cattle / J Anim Sci 73:2483~2492
H.J.Lee / 2003 / Methane Production Potential of Feed Infredients as Measured by In Vitro Gas Test / Animal Bioscience 16(8):1143~1150
L eaphart AB / 2003 / Formyltetrahydrofolate synthetase sequences from salt marsh plant roots reveal a diversity of acetogenic bacteria and other bacterial functional groups / Appl Environ Microbiol 69:693~696
Sawal RK / 1998 / Milk yield and its fat content as affected by dietary factors : a rewiew / Asian-Austalas J Anim Sci 11:217~233
Johnson KA / 1995 / Methane emissions from cattle / J Anim Sci 73:2483~2492
H.J.Lee / 2003 / Methane Production Potential of Feed Infredients as Measured by In Vitro Gas Test / Animal Bioscience 16(8):1143~1150
L eaphart AB / 2003 / Formyltetrahydrofolate synthetase sequences from salt marsh plant roots reveal a diversity of acetogenic bacteria and other bacterial functional groups / Appl Environ Microbiol 69:693~696
Sawal RK / 1998 / Milk yield and its fat content as affected by dietary factors : a rewiew / Asian-Austalas J Anim Sci 11:217~233
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