Effect of dietary probiotics and stocking density on carcass traits, meat quality, microbial populations and ileal histomorphology in broilers under hot-climate conditions

2019 ◽  
Vol 59 (9) ◽  
pp. 1711 ◽  
Author(s):  
T. A. Ebeid ◽  
M. M. Fathi ◽  
I. Al-Homidan ◽  
Z. H. Ibrahim ◽  
A. A. Al-Sagan
Keyword(s):  
Chemical Composition ◽  
Meat Quality ◽  
Carcass Traits ◽  
Stocking Density ◽  
Dietary Supplementation ◽  
Microbial Populations ◽  
Probiotic Supplementation ◽  
Climate Conditions ◽  
E Coli ◽  
Hot Climate

The objective of the present study was to investigate the potential effects associated with dietary probiotic inclusion and the stocking density on carcass traits, meat chemical composition, meat sensory quality, microbial populations and ileal histomorphology in broiler chickens raised under hot climate conditions. In total, 1800 1-day-old unsexed broiler chicks (Ross 308) were randomly allocated in a completely randomised design according to a 3 × 2 factorial arrangement, with three concentrations of a dietary probiotic (0, 200 and 400 mg/kg) containing 4 × 109 cfu/g of Bacillus subtilis and two stocking densities (12 or 18 birds/m2), forming six treatments, with three pens (replicates) each. The probiotic concentration had no significant (P > 0.05) effect on bodyweight gain, feed consumption, feed conversion ratio, carcass percentage and meat chemical composition. Dietary probiotic inclusion significantly (P = 0.02) increased the scores of meat colour and odour. The acceptability score was significantly (P < 0.03) affected by the stocking density. Dietary supplementation of the probiotic at both 200 and 400 mg/kg significantly (P = 0.05) reduced the counts of Escherichia coli and Salmonella in the gut and litter. In meat, dietary supplementation of the probiotic at 200 and 400 mg/kg significantly (P = 0.03) reduced the counts of E. coli, compared with those of the control group. Moreover, Salmonella was not detected in meat. Regarding the ileal villi and crypt morphology, dietary probiotic supplementation significantly (P = 0.05) increased the height of the villus. There were no significant probiotic concentration × stocking density interactions for any of the investigated parameters, except for the gizzard percentage. Thus, dietary probiotic supplementation in broilers raised under a high ambient temperature had a significantly positive effect on the ileal villus height and a significantly negative effect on the counts of E. coli and Salmonella in the gut and litter. No negative effects on growth performance, carcass parts and meat quality were detected.

Differences in carcass traits, meat quality and chemical composition between the pigs of different CAST genotype

2016 ◽  
Vol 56 (10) ◽  
pp. 1745 ◽  
Author(s):  
I. Djurkin Kušec ◽  
G. Kušec ◽  
R. Vuković ◽  
E. Has-Schön ◽  
G. Kralik
Keyword(s):  
Chemical Composition ◽  
Meat Quality ◽  
Shear Force ◽  
Carcass Traits ◽  
Muscle Thickness ◽  
Intensity Level ◽  
Quality Traits ◽  
Calpain Activity ◽  
Meat Quality Traits ◽  
Pig Carcasses

The study was carried out on 89 Pig Improvement Co. (PIC) pig carcasses, with the aim to investigate the differences between three CAST loci in carcass and meat-quality traits, as well as chemical composition of longissimus dorsi (LD) muscle. The differences among genotypes at CAST/HinfI locus were significant in all carcass traits measured, where AB genotype exhibited preferable values in carcass lengths, ham length, muscle thickness, loin eye area, fat thickness and fat area. Among meat-quality traits analysed, genotypes at CAST/HinfI locus differed in pH45 in SM muscle, both pH24 in semimembranosus (SM) and LD muscles, as well as luminosity; genotypes at CAST/MspI differed in pH24 and EC24 measured at LD muscle and in red colour intensity, level of yellowness and hue angle; while genotypes at CAST/RsaI differed in pH45 and EC45 in SM muscle, pH24 in LD muscle, paleness and redness, as well as in shear force and calpain activity. EF genotype at this locus exhibited the highest pH values and the lowest CIE L*, with more pronounced red colour, but also highest shear force and lowest calpain activity values. Furthermore, significant differences in chemical composition of LD muscle were found only among genotypes at CAST/RsaI loci, where FF genotype had the lowest intramuscular fat and the highest relative share of protein.

Comparison of Carcass Traits, Meat Quality, and Chemical Composition of Tissues from Progeny Derived from Cloned and Noncloned Pigs

2019 ◽  
Vol 21 (6) ◽  
pp. 296-300
Author(s):  
Ting Gu ◽  
Junsong Shi ◽  
Lvhua Luo ◽  
Zicong Li ◽  
Enqin Zheng ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Meat Quality ◽  
Carcass Traits

scholarly journals Carcass Traits, Meat Characteristics, and Economic Viability of Grazing Nellore Cattle Produced Under Different Supplementation Strategies in the Tropics

2021 ◽  
Author(s):  
Jenifer Maira Lima Ramos ◽  
Julián Andrés Castillo Vargas ◽  
Evellyn Aryane Lopes Diniz ◽  
Natália Gomes Lacerda ◽  
Rafael Mezzomo ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Meat Quality ◽  
Carcass Traits ◽  
Economic Viability ◽  
Quality Traits ◽  
Concentrate Supplementation ◽  
Meat Quality Traits ◽  
Nellore Cattle ◽  
The Tropics ◽  
Dry And Rainy Seasons

Abstract This study explored the effects of different supplementation strategies in the dry and rainy seasons in the tropics on the carcass traits, meat quality, and economic viability of Nellore cattle produced under grazing conditions. For this purpose, twenty-eight non-castrated male animals (18 months) with an initial body weight of 327.93 ± 4.22 kg were used. The animals were equitably distributed in a randomized complete design thorough four supplementation strategies as follows: i) mineral supplementation (MS) in both dry and rainy seasons (MS/MS), ii) MS in the dry season and concentrate supplementation (CS) in the rainy season (MS/CS), iii) CS in the dry season and MS in the rainy season (CS/MS), and iv) CS in both dry and rainy seasons (CS/CS). Thereafter, carcass traits, primary carcass cut yields, meat quality traits, chemical composition of meat, and economic viability of cattle production across different supplementation strategies were determined. Data revealed that animals under CS/CS showed the greatest (P < 0.01) hot carcass weights among the other supplementation strategies evaluated. Conversely, supplementation strategy did not affect (P > 0.05) carcass traits (the ribeye area, final pH, and forequarter), meat quality traits (shear force, myofibrillar fragment index, sarcomere length, and color), and meat chemical composition (crude protein, fat, and moisture) of the animals. The effective operational cost, total cost, gross revenue, and profit of animals under CS/CS showed the greatest values, whereas the lowest ones were obtained for the animals under MS/MS. In conclusion, data suggest that concentrate supplementation during at least one season (dry or rainy) produces similar meat quality traits and chemical composition of meat, but different hot carcass weight, backfat thickness and hindquarter proportion to those observed when animals were supplemented with concentrate in both seasons. Additionally, CS/CS animals, despite having a higher total cost, have greater profitability when raised in tropical pasture.

scholarly journals Multiple Amino Acid Supplementations to Low-Protein Diets: Effect on Performance, Carcass Yield, Meat Quality and Nitrogen Excretion of Finishing Broilers under Hot Climate Conditions

Animals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 973 ◽  
Author(s):  
Youssef A. Attia ◽  
Fulvia Bovera ◽  
Jinquan Wang ◽  
Mohammed A. Al-Harthi ◽  
Woo Kyun Kim
Keyword(s):  
Amino Acid ◽  
Meat Quality ◽  
Crude Protein ◽  
Positive Control ◽  
Nitrogen Excretion ◽  
Carcass Yield ◽  
Climate Conditions ◽  
Low Protein ◽  
Hot Climate ◽  
Protein Diets

The objective of this study was to evaluate the effect of low-protein diets with amino acid supplementation on growth performance, carcass yield, meat quality and nitrogen excretion of broilers raised under hot climate conditions during the finisher period. In trial 1, broilers from 28 to 49 days of age were fed 18% crude protein (CP) as a positive control or 15% CP supplemented with (1) DL-methionine (Met) + L-lysine (Lys), (2) Met + Lys + L-Arginine (Arg), or (3) Met + Lys + L-Valine (Val). In trial 2, broilers from 30 to 45 days of age, were fed an 18% CP diet as a positive control or 15% CP supplemented with Met, Lys, Arg, Val, L-Isoleucine (Ile) or combination with glycine (Gly) and/or urea as nitrogen sources: (1) Met + Lys, (2) Met + Lys + Arg, (3) Met + Lys + Val, (4) Met + Lys + Ile, (5) Met + Lys + Arg +Val + Ile + Gly, and (6) Met+ Lys + Arg + Val + Ile + Gly + urea. Protein use was improved by feeding low-protein amino acid-supplemented diets as compared to the high-protein diet. Feeding 15% crude protein diet supplemented with only methionine and lysine had no negative effects on carcass yield, CP, total lipids and moisture% of breast meat while decreasing nitrogen excretion by 21%.

scholarly journals Carcass traits and meat quality of steers on pasture submitted to different dietary supplementation

2019 ◽  
Vol 40 (6) ◽  
pp. 2693
Author(s):  
Bruna Biava de Menezes ◽  
Henrique Jorge Fernandes ◽  
Maria da Graça Morais ◽  
Edneia Pereira Rosa ◽  
Andrea Roberto Duarte Lopes Souza ◽  
...  
Keyword(s):  
Body Weight ◽  
Meat Quality ◽  
Carcass Traits ◽  
Subcutaneous Fat ◽  
Dietary Supplementation ◽  
Feeding Strategies ◽  
Concentrate Supplementation ◽  
Longissimus Dorsi Muscle ◽  
Ad Libitum

This study aimed at evaluating carcass traits and meat quality of Nellore steers on pasture submitted to different dietary supplementation strategies. The 32 Nellore animals tested (8 ± 0.6 months) were raised under rotational grazing on Brachiaria brizantha cv. Piatã (syn. Urochloa brizantha cv. Piatã) pasture and distributed in four treatments: supply of mineral salt ad libitum in the growth and finishing phases (MSGF); concentrate supplementation only during the growth phase (CG); concentrate supplementation only during the finishing phase (CF) and concentrate supplementation the growth and finishing phases (CGF). The concentrated supplement was supplied at 0.5% of body weight and mineral ad libitum. The steers were slaughtered when more than 50% of the lot of each treatment reached 450 kg body weight. The mean the hot and cold carcass weight and subcutaneous fat thickness did not differ between treatments (P > 0.05). The calves the treatment CF and CGF showed a larger rib-eye area and higher ether extract levels in the Longissimus dorsi muscle than in MSGF and CG (P < 0.05). Mean shearing force was similar between treatments (P > 0.05). The use of feeding strategies on pasture with concentrate supplementation in the growth and finishing phases of Nellore cattle anticipates slaughter in 92 days and produces carcasses and meat with satisfactory traits.

scholarly journals Effect of hesperidin dietary supplementation on growth performance, carcass traits and meat quality of rabbits

2014 ◽  
Vol 22 (2) ◽  
pp. 113 ◽  
Author(s):  
P.E. Simitzis ◽  
C. Babaliaris ◽  
M.A. Charismiadou ◽  
G. Papadomichelakis ◽  
M. Goliomytis ◽  
...  
Keyword(s):  
Growth Performance ◽  
Meat Quality ◽  
Carcass Traits ◽  
Dietary Supplementation
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