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Effects of Glucosamine-derived Caramels on Performance and Bone Health of Broilers

2021 CPRF,Nutrition
The rapid growth predisposes broilers to locomotor problems due to excessive stress on immature cartilage. This can reduce broiler welfare and performance, causing economic losses for the industry. This study aimed to evaluate the potential of glucosamine-derived caramels to prevent tibial and femoral head lesions and enhance the performance of broiler chickens from 0 to 42 d. A total of 1,120 broilers were randomly assigned to 14 treatments with 8 replicate cages of 10 birds each. The treatments were: Control (C; commercial-type diet), C + Glucosamine (GlcN; no caramelization), and 4 glucosamine-derived caramels: Light Caramel (LC; produced at 50°C), Brown Caramel (BC; produced at 90°C), LC+fructose, and BC+fructose; each product was included at 0.08, 0.16 or 0.24% of the diet. Feed intake (FI), body weight gain (BWG), and feed conversion ratio (FCR) were measured at 10, 25, and 38 d of age. Tibial and femoral head gross lesion scores were evaluated at 42 d. Parametric data were analyzed by ANOVA with means compared by Tukey’s test at P < 0.05, and non-parametric data were analyzed by Kruskal-Wallis. At 10 d of age, birds fed LC at 0.24% had greater weight (232.82 ± 5.26 g), BWG (19.34 ± 0.55 g), and lower FCR (1.31 ± 0.04 g) than those fed LC+fructose (195.79 ± 19.23 g; 15.78 ± 1.93 g and 1.51 ± 0.16 g, respectively), but was similar to the other treatments, including C. At 25 d of age, LC at 0.16% resulted in greater weight (979.90 ± 43.39 g; P = 0.02) than LC+fructose at 0.08% (828.37 ± 105.20 g) but was similar to the other treatments. For the entire period (0 to 38 d), birds fed LC at 0.16% were heavier at 38d (2,043.5 ± 129.3 g; P = 0.04) than treatments LC+fructose at 0.08% (1,797.3 ± 146.5 g), LC at 0.08% (1,885.1 ± 140.6 g), BC+fructose at 0.16% (1,823.1 ± 147.5 g) and BC at 0.16% (1,823.0 ± 188.6 g) but was similar to the other treatments, including C. There were no treatment effects on the tibial head lesion scores. The femoral head lesion scores tended to be significant (P = 0.07), with LC included at 0.08 responsible for the highest frequency of birds with healthy femurs (87.5% with score 1) or with minimal lesions (12% with score 2), while the C group had 75% of the birds with healthy femurs and 25% with femoral head transitional degeneration (scores 3 and 4). Light glucosamine-derived caramels might be part of a strategy to enhance performance and bone health in broilers; however, more analyses and further studies are required to understand better the mechanism of action.
Tags :
bone health,broilers,Glucosamine-derived Caramels
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Presenter

PhD Student

University of Alberta

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