Effects of Dietary Protein Levels on Growth Performance, Carcass Traits, Serum Metabolites, and Meat Composition of Tibetan Sheep during the Cold Season on the Qinghai-Tibetan Plateau

Wang, Xungang; Xu, Tianwei; Geng, Yuanyue; Kang, Shenghong; Xu, Shixiao

doi:10.3390/ani10050801

Cited by 27 publications

(20 citation statements)

References 46 publications

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“…However, blood urea increased by increasing protein level but the increase was not significant. Similar results have been reported by other researchers (12,15,21,29,34,35).…”

Section: Blood Parameterssupporting

confidence: 93%

Effect of Different Protein Levels on Growth Performance, Carcass Trait, Digestibility and Some Blood Bieochemical Parameters in Awassi Lambs

Yateem¹,

Mustafa²,

Alkass³

2021

Iraqi J. Agric. Sci.

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Twenty one Awassi lambs (4 month old and 23.59 ± 031 kg body weight) were used to investigate the effect of different levels of protein on growth, carcass traits, body composition, digestibility and some blood parameters. The lambs were divided equally and randomly and penned individually into three treatment groups, and fed ad lib on low protein (129.1 T1) medium protein (140.6 T2) and high protein (151.1 T3, g/kg DM). After 72 days of fattening, 5 lambs from each treatment were chosen randomly and slaughtered. The result showed that lambs fed on T3 diet had significantly (P<0.05) higher daily gain (210.83 g), better feed efficiency (4.8 kg/kg), higher dressing percentage (51.67 %), and rib eye area muscle (12.05 cm2) than those fed in T2 and T3, as well as digestibility coefficient of dry matter, organic matter, crude protein, and total digestible nutrient (TDN) was also numerically higher in group fed (151.1 g/kg DM) as compared with lambs received low or medium level of protein. It could be concluded that the high dietary protein level produce the better performance, carcass traits and nutrient digestion of lambs.

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“…However, blood urea increased by increasing protein level but the increase was not significant. Similar results have been reported by other researchers (12,15,21,29,34,35).…”

Section: Blood Parameterssupporting

confidence: 93%

Effect of Different Protein Levels on Growth Performance, Carcass Trait, Digestibility and Some Blood Bieochemical Parameters in Awassi Lambs

Yateem¹,

Mustafa²,

Alkass³

2021

Iraqi J. Agric. Sci.

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“…Crude protein is a vital factor in the growth and reproduction of ruminants. Improving the dietary protein level not only promotes yak growth, and the activity of several enzymes, but improves meat composition in Tibetan sheep ( Zhang et al, 2014 ; Wang et al, 2020 ). In our study, we found that the H group had a negative effect on bacterial richness and alpha diversity, suggesting that a high-quality diet may support lower bacterial diversity, but that lower diversity is not necessarily conducive to a healthy rumen environment ( Latham et al, 2018 ), which is consistent with previous research ( Petri et al, 2013 ).…”

Section: Discussionmentioning

confidence: 99%

Effect of Dietary Protein Levels on Dynamic Changes and Interactions of Ruminal Microbiota and Metabolites in Yaks on the Qinghai-Tibetan Plateau

Wang

Geng

et al. 2021

Front. Microbiol.

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To improve performance and optimize rumen function in yaks (Bos grunniens), further knowledge on the appropriate dietary protein levels for ruminal microbiota and the metabolite profiles of yaks in feedlot feeding is necessary. Current understanding of dietary protein requirements, ruminal microbiota, and metabolites is limited. In this study, yaks were fed a low-protein diet (L; 9.64%), middle low-protein diet (ML; 11.25%), middle high-protein diet (MH; 12.48%), or a high-protein diet (H; 13.87%), and the effects of those diets on changes and interactions in ruminal microbiota and metabolites were investigated. Twenty-four female yaks were selected, and the effects on ruminal microbiota and metabolites were investigated using 16s rRNA gene sequencing and gas chromatography time-of-flight/mass spectrometry (GC-TOF/MS). Diets containing different protein levels changed the composition of the rumen bacterial community, the H group significantly reduced the diversity of ruminal microbiota (p < 0.05), and the number of shared amplicon sequence variants (ASVs) between the H group and the other three groups was lower, suggesting that the ruminal microbiota community fluctuated more with a high-protein diet. In rumen, Bacteroidetes, Firmicutes, and Proteobacteria were the most abundant bacteria at the phylum level, and Bacteroidetes was significantly less abundant in the MH group than in the L and ML groups (p < 0.05). Prevotella_1, Rikenellaceae_RC9_gut_group, and Christensenellaceae_R-7_group had the highest abundance at the genus level. Prevotellaceae was enriched in the low-protein groups, whereas Bacteroidales_BS11_gut_group was enriched in the high-protein groups. Rumen metabolite concentrations and metabolic patterns were altered by dietary protein levels: organic acid metabolites, antioxidant-related metabolites, and some plant-derived metabolites showed variation between the groups. Enrichment analysis revealed that significant changes were concentrated in six pathways, including the citrate cycle (TCA cycle), glyoxylate and dicarboxylate metabolism, and butanoate metabolism. Network analysis showed promotion or restraint relationships between different rumen microbiota and metabolites. Overall, the rumen function was higher in the MH group. This study provides a reference for appropriate dietary protein levels and improves understanding of rumen microbes and metabolites.

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“…In healthy humans, an increase in skeletal muscle echointensity usually results from loss in muscle mass (quantitative change), declining number and size of muscle fibers [ 44 ] and/or age-related accumulation of fat and fibrous tissue (qualitative change; [ 45 ]). The diameter of muscle fibers is higher is animals fed high-protein feed compared with those receiving low-protein diets, while the concurrent change in density of muscle fibers has shown the opposite trend [ 46 , 47 ]. Skeletal muscles with larger and less densely distributed muscle fibers generally exhibit higher pixel intensity of skeletal muscles [ 48 ].…”

Section: Discussionmentioning

confidence: 99%

Correlations among Ultrasonographic, Physicochemical and Sensory Characteristics of Pectoralis Major Muscles in Turkeys Reared in a Sustainable Farming System

Schwarz

Węglarz

Andres

et al. 2021

Animals

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This study set out to examine associations among echotextural, physicochemical and sensory attributes of the pectoralis major muscles in 17-week-old organic turkeys (B.U.T. Big-6) varying in the amount of wheat and oat grain in daily feed rations (Group C: complete feed only; Group Exp1: 5–30% of wheat and 0–20% of oat; and Group Exp2: 5–50% of wheat and 0–50% of oat; n = 15 turkeys/group). Digital ultrasonograms of the left pectoral muscle in four different planes (longitudinal-L, transverse-T, and two oblique planes-O1 and O2) were obtained with a 5.0-MHz linear-array transducer just before slaughter. Mean numerical pixel intensity (MPI) and pixel heterogeneity (MPH) of the muscle parenchyma were computed using the ImageProPlus® analytical software. Ten significant correlations between echotextural attributes and various meat characteristics were recorded in Group C, one in Group Exp1, and eight in Group Exp2. When data were pooled for all birds studied, there were twelve significant correlations (p < 0.05); all but one correlation (between MPH and moisture) were for physical and sensory characteristics of meat samples. Computer-assisted analysis is a potential method to determine moisture as well as physical (e.g., coloration) and sensory (e.g., aroma) characteristics of pectoralis major muscles in organic turkeys.

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Effects of Dietary Protein Levels on Growth Performance, Carcass Traits, Serum Metabolites, and Meat Composition of Tibetan Sheep during the Cold Season on the Qinghai-Tibetan Plateau

Cited by 27 publications

References 46 publications

Effect of Different Protein Levels on Growth Performance, Carcass Trait, Digestibility and Some Blood Bieochemical Parameters in Awassi Lambs

Effect of Different Protein Levels on Growth Performance, Carcass Trait, Digestibility and Some Blood Bieochemical Parameters in Awassi Lambs

Effect of Dietary Protein Levels on Dynamic Changes and Interactions of Ruminal Microbiota and Metabolites in Yaks on the Qinghai-Tibetan Plateau

Correlations among Ultrasonographic, Physicochemical and Sensory Characteristics of Pectoralis Major Muscles in Turkeys Reared in a Sustainable Farming System

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