The Effects of Decreasing Dietary Crude Protein on the Growth Performance, Feed Efficiency and Meat Quality of Finishing Charolais Bulls

Cortese, Martina; Segato, Severino; Andrighetto, Igino; Ughelini, Nicola; Chinello, Maria; Schiavon, Eliana; Marchesini, Giorgio

doi:10.3390/ani9110906

Cited by 19 publications

(16 citation statements)

References 50 publications

(59 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the present study, the 12.0% CP diet seemed to limit the growth performance of Anhui white goats. That decreasing protein content of the diet's compromising daily weight gain was also observed in finishing Charolais bulls [24]. It is of great importance to formulate diets that foster the digestibility and utilization of feed stuff [25].…”

Section: Discussionmentioning

confidence: 87%

Effects of Decreasing Dietary Crude Protein Level on Growth Performance, Nutrient Digestion, Serum Metabolites, and Nitrogen Utilization in Growing Goat Kids (Capra. hircus)

Zhu

Wei

et al. 2020

Animals

View full text Add to dashboard Cite

The effects of decreasing dietary crude protein (CP) level on growth performance, nutrient digestion, serum metabolites, and nitrogen utilization in growing goat kids were investigated in the current study. Thirty-six male Anhui white goat kids were randomly assigned to one of three CP content diets: 14.8% (control), 13.4%, and 12.0% of dry matter, respectively. Diets were isoenergetic. The experiment lasted for 14 weeks, with the first two weeks being for adaptation. Results showed that the low-CP diet decreased average daily gain, feed efficiency, digestibility of dry matter, organic matter, crude protein, and fiber. No significant changes were observed in dry-matter intake. With a decrease in dietary CP level, fecal nitrogen excretion (% of nitrogen intake) increased linearly, whereas CP intake, blood urea nitrogen, urinary nitrogen excretion (% of nitrogen intake), and total nitrogen excretion (% of nitrogen intake) decreased. Serum glucose concentration decreased, while concentrations of low-density lipoproteins and non-esterified fatty acids increased with the low-CP diet. In conclusion, decreasing the dietary CP level decreased goats’ nitrogen excretion, but with restrictive effects on growth performance. A diet containing 13.4% CP is optimal for reducing nitrogen excretion without any adverse effect on growth performance of Anhui white goat kids. This concentration is 1.4% points lower than the NRC recommendations and thus is also environmentally beneficial on the input side because it decreases the use of feed (soy) protein.

show abstract

Section: Discussionmentioning

confidence: 87%

Effects of Decreasing Dietary Crude Protein Level on Growth Performance, Nutrient Digestion, Serum Metabolites, and Nitrogen Utilization in Growing Goat Kids (Capra. hircus)

Zhu

Wei

et al. 2020

Animals

View full text Add to dashboard Cite

show abstract

“…In addition, the meat color can also be evaluated by calculations using a * and b * value in the form of chroma ( C * = [ a * 2 + b * 2 ] 1/2 ) and hue ( H * = tan −1 [ b */ a *]). There are numerous articles that have been published reporting the effects of protein levels on meat color, and the low CP level increased the meat color value especially L * compared with HP levels (Cortese et al, 2019; Prado et al, 2015). In this experiment, the L *, a *, b *, C *, and hue angle of LD from the LP lambs scored higher than the HP lambs ( P < 0.05; Table 5).…”

Section: Resultsmentioning

confidence: 99%

Effects of two dietary crude protein levels on finishing performance, meat quality, and gene expression of market lambs

Wang

Shelby

Apple

et al. 2021

Animal Science Journal

View full text Add to dashboard Cite

Seventeen crossbred lambs were assigned randomly to low-protein (LP; 8% crude protein [CP]; n = 9) and high-protein (HP; 13% CP; n = 8) diets for 9 weeks. The final body weight, average daily feed intake (ADFI), and average daily gain (ADG) of the HP lambs were significantly higher (P < 0.05) than the LP lambs; however, gain to feed ratio (G:F) for the LP lambs was significantly higher (P < 0.05) than the HP lambs. Hot carcass weight (HCW), adjusted fat thickness, and drip loss of longissimus dorsi (LD) muscle were significantly higher (P < 0.05) for the HP than LP lambs. In contrast, instrumental color values L*, a*, b*, C*, and hue angle (H) of meat from the LP lambs scored significantly higher (P < 0.05) than the HP lambs. The LD muscle from HP lambs had significantly greater CLA of cis-9 trans-11 isomer (P < 0.05) than the LP lambs. The gene expression of metabolism and meat quality-related genes of LP was significantly higher than HP (P < 0.05). These results suggest that a higher dietary CP level promotes growth performance for finishing lambs, whereas lower dietary CP level is beneficial for meat quality, especially when evaluating color characteristics in the final product.crude protein level, finishing lambs, gene expression, growth performance, meat quality | INTRODUCTIONRecently, studying the resilience of animals facing environmental challenging is not only becoming critical in animal industry but also in ensuring sustainable agriculture (Wilkes et al., 2012). Decreasing crude protein (CP) levels in diets of small ruminants reduces excess N excretion and feed cost for producers (Cole et al., 2003). It was reported that lambs need less CP content during finishing period compared with immature stage (National Research Council, 1985).The feasibility of providing the CP level, which is lower than the requirement of finishing lambs, is still unknown.Animal performance and meat quality characteristics are two of the most important measures of production value because of the strong relationship between industry income and consumer preferences (Grunert et al., 2004). Nutritional deficiencies in young, growing animals are reflected more quickly than in mature animals due to their higher basal metabolic rate (National Research Council, 1958; USDA & Grazing Lands Technology Institute, 1997). Energy and protein are two important nutrients related to growth, protein accretion, and meat quality traits in food animals. The amount of tissue deposited as carcass components is primarily determined by the nutrition available for growth and development, especially protein and energy nutrients

show abstract

“…As the LP diet contained lower levels of nutrients than other two diets, the sheep in the LP group exhibited poorer growth performance, as shown by the lower hot carcass weight, net meat (including the fat) weight, and bone weight. Furthermore, Cortese et al [31] reported that the carcass yield of Charolais bulls was not affected by increased dietary protein levels. Luo et al [28] also showed that there were no differences in backfat thickness and carcass yield in fattening pigs fed with different levels of β-glucan supplementation.…”

Section: Carcass Traitsmentioning

confidence: 99%

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

Geng

et al. 2020

Animals

View full text Add to dashboard Cite

Dietary protein is a critical nutrient that directly influences the health and production of livestock. Recent studies showed that protein supplements could enhance the growth performance of Tibetan sheep. However, there is a lack of information regarding the influence of dietary protein levels on carcass traits and meat composition. This study investigated the effects of dietary protein levels on growth performance, carcass traits, serum metabolites, and meat composition in Tibetan sheep during the cold season on the Qinghai-Tibetan Plateau. A total of eighteen 1-year-old, healthy, castrated Tibetan sheep with similar initial body weights (31.7 ± 0.72 kg) were randomly divided into three treatment groups with different dietary protein level (low protein (LP, 10.1%); medium protein (MP, 12.1%); high protein (HP, 14.1%)) diets. The results indicated that the Tibetan sheep fed with the MP and HP diets had greater final body weights (BWs), average daily gains (ADGs), and average daily feed intakes (ADFIs) (p < 0.05). The MP and HP diets also improved the hot carcass weight, net meat (including the fat) weight, and bone weight of the sheep significantly (p < 0.05). Besides, the dietary protein levels could significantly affect the serum concentrations of growth hormone (p < 0.05). The diameter of muscle fibers in the MP group was significantly greater than that in the LP group (p < 0.05), while the density of muscle fibers showed the opposite trend. The dietary protein levels only significantly (p < 0.05) influenced the ether extract content and profile content of the longissimus dorsi muscle but had no effect on other parameters of meat composition. In summary, our results indicate that dietary protein levels affect growth performance, carcass traits, and meat composition and that diets containing 12.1% and 14.1% protein are recommended to obtain better production performance and meat products in Tibetan sheep, rather than a diet containing 10.1% protein, during the cold season on the Qinghai-Tibetan Plateau.

show abstract

The Effects of Decreasing Dietary Crude Protein on the Growth Performance, Feed Efficiency and Meat Quality of Finishing Charolais Bulls

Cited by 19 publications

References 50 publications

Effects of Decreasing Dietary Crude Protein Level on Growth Performance, Nutrient Digestion, Serum Metabolites, and Nitrogen Utilization in Growing Goat Kids (Capra. hircus)

Effects of Decreasing Dietary Crude Protein Level on Growth Performance, Nutrient Digestion, Serum Metabolites, and Nitrogen Utilization in Growing Goat Kids (Capra. hircus)

Effects of two dietary crude protein levels on finishing performance, meat quality, and gene expression of market lambs

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

Contact Info

Product

Resources

About