Feeding strategies with total mixed ration and concentrate may
                    improve feed intake and carcass quality of Hanwoo steers

Lee, Soohyung; Lee, Sang Moo; Lee, Jaehun; Kim, Eun Joong

doi:10.5187/jast.2021.e88

Cited by 6 publications

(5 citation statements)

References 26 publications

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“…On the contrary, some studies reported contradictory results regarding TMR and feed intake. Lee et al [ 31 ] reported that separate feeding of concentrate mix and forage did not significantly affect feed intake during the fattening period, whereas TMR feeding increased feed consumption during the growing period. Cattle at the fattening stage (32-month old) used in the current study, and their daily feed intake was not affected by the feeding method.…”

Section: Discussionmentioning

confidence: 99%

Evaluating feed value of native Jeju bamboo (Sasa quelpaertensis Nakai) for beef cattle

et al. 2023

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Objective: Recently, indigenous Korean grass Sasa quelpaertensis Nakai (SQ) has garnered much interest as a roughage source for livestock to mitigate its adverse effects on habitat diversity. Thus, the objective of the present study was to evaluate the ruminal fermentation, palatability, and nutrient digestibility of SQ for Korean native beef cattle (Hanwoo) using in vitro rumen fermentation, in situ rumen degradability, and in vivo feeding trials.Methods: Using in vitro tests with rumen fluid as the inoculum for 48 h, ruminal fermentation of SQ was evaluated and compared with that of other roughage sources commonly used in Korea (i.e., rice straw, Timothy hay, and Italian ryegrass [IRG]). Additionally, an in situ trial 96 h was performed using three cannulated Hanwoo steers. Further, an in vivo trial was performed using eight Hanwoo steers to compare the palatability of SQ with rice straw in total mixed ration (TMR) and forage-concentrate separate feeding conditions. Finally, an in vivo digestibility trial of SQ fed as TMR of two particle sizes was performed with four Hanwoo steers.Results: In vitro and in situ trials revealed that SQ was comparable or superior to rice straw in terms of the ruminal fermentation characteristics of pH, gas production, total volatile fatty acid content, and effective ruminal dry matter digestibility (DMD), although its fermentability was lower than that of Timothy hay and IRG. In the palatability test, steers showed a greater preference for SQ when given as TMR. The total tract DMD of SQ fed as TMR was 75.9%±1.37%, and it did not differ by particle size.Conclusion: The feed value of SQ as a roughage source for Hanwoo steers is comparable or superior to that of rice straw, particularly when provided as TMR.

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Section: Discussionmentioning

confidence: 99%

Evaluating feed value of native Jeju bamboo (Sasa quelpaertensis Nakai) for beef cattle

et al. 2023

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“…3 Methane conversion factor = gross energy percent in feed converted to methane [1]. 4 Methane emission factor = (MJ/head/d of gross energy intake) × (MCF ÷ 100) × 365 ÷ (55.65 MJ/kg of methane) [1].…”

Section: Discussionmentioning

confidence: 99%

“…Total mixed ration (TMR) is an efficient ruminant feeding system that prevents selective feeding, maintains ruminal pH, and improves carcass yield and quality grade [4][5][6]. Alternatively, general or separate feeding (SF) systems provide a concentrate mix with forage through individual feeders [7].…”

Section: Introductionmentioning

confidence: 99%

Effects of different feeding systems on ruminal fermentation, digestibility, methane emissions, and microbiota of Hanwoo steers

Lee,

Kim,

Baek

et al. 2023

J Anim Sci Technol

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This study evaluates how different feeding systems impact ruminal fermentation, methane production, and microbiota of Hanwoo steers native to Korea. In a replicated 2 × 2 crossover design over 29 days per period, eight Hanwoo steers (507.1 ± 67.4 kg) were fed twice daily using a separate feeding (SF) system comprising separate concentrate mix and forage or total mixed rations (TMR) in a 15:85 ratio. The TMR-feeding group exhibited a considerable neutral detergent fiber digestibility increase than the SF group. However, ruminal fermentation parameters and methane production did not differ between two feeding strategies. In addition, TMR-fed steers expressed elevated Prevotellaceae family, Christensenellaceae R-7 group, and an unidentified Veillonellaceae family genus abundance in their rumen, whereas SF-fed steers were rich in the Rikenellaceae RC9 gut group, Erysipelotrichaceae UCG-004, and Succinivibrio . Through linear regression modeling, positive correlations were observed between the Shannon Diversity Index and the SF group’s dry matter intake and methane production. Although feeding systems do not affect methane production, they can alter ruminal microbes. These results may guide future feeding system investigations or ruminal microbiota manipulations as a methane-mitigation practice examining different feed ingredients.

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“…Total mixed ration (TMR) refers to a diet that provides a generally balanced amount of nutrients based on the dietary requirements of animals at different growth stages by thoroughly mixing various additives, concentrate feeds with varying nutrient levels, and roughage feeds in a particular proportion [ 2 ]. TMR feeding is a standardized, large-scale technology commonly used for ruminants [ 3 , 4 ]. Previous research demonstrated that different feeding methods could change the feed intake of dairy horses, influence the body’s ability to absorb nutrients, and boost economic rewards [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Concentrate Feeding Sequence on Growth Performance, Nutrient Digestibility, VFA Production, and Fecal Microbiota of Weaned Donkeys

Xie,

Xing,

et al. 2023

Animals

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In this study, effects on the growth performance, nutrient digestibility, volatile fatty acids (VFA) production, and fecal microbiota of weaned donkeys were observed using different concentrate feeding sequences. Fifteen healthy 6-month-old weaned male donkeys with a body weight of 117.13 ± 10.60 kg were randomly divided into three treatment groups, including group C1 (roughage-then-concentrate), group C2 (concentrate-then-roughage), and group C3 (total mixed ration, TMR). The experiment lasted 35 d. We measured nutrient digestion by the acid-insoluble ash method and analyzed the fecal microbiota of the weaned donkeys by high-throughput sequencing of 16s rRNA genes in the V3-V4 region. The results show that group C3 obtained the best growth performance, and the digestibility of crude protein (CP) and crude extract (EE) was significantly higher than that of group C1 (p < 0.05). Acetic acid, isobutyric acid, valeric acid, isovaleric acid, and caproic acid were notably different among all groups (p < 0.05). In addition, we observed that Firmicutes and Bacteroidetes were dominant in the fecal microbes of each group, and Firmicutes was significantly higher in group C3 (p < 0.05). At the genus level, the different genera were Treponema, Rikenellaceae-RC9-gut-group, Unidentified-F082, and Bacteroidales-RF16-group (p < 0.05). The prediction of fecal microbiota function by PICRUSt indicated that different feeding sequences had minimal impact on the function of the fecal microbiota, particularly on the high-abundance pathway. In summary, the concentrate feeding sequence changed the composition of the fecal microbe of weaned donkeys.

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Feeding strategies with total mixed ration and concentrate may improve feed intake and carcass quality of Hanwoo steers

Cited by 6 publications

References 26 publications

Evaluating feed value of native Jeju bamboo (Sasa quelpaertensis Nakai) for beef cattle

Evaluating feed value of native Jeju bamboo (Sasa quelpaertensis Nakai) for beef cattle

Effects of different feeding systems on ruminal fermentation, digestibility, methane emissions, and microbiota of Hanwoo steers

Effects of Concentrate Feeding Sequence on Growth Performance, Nutrient Digestibility, VFA Production, and Fecal Microbiota of Weaned Donkeys

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