Department of Agricultural and Food Sciences, Alma Mater Studiorum-University of Bologna, 40064 Ozzano dell'Emilia, Italy.
Poult Sci. 2019 Jun 1;98(6):2691-2697. doi: 10.3382/ps/pey608.
This study was carried out to evaluate the effect of different digestible arginine-to-lysine (dig Arg:Lys) ratio in broiler diets on the occurrence of breast myopathies, productivity, and meat quality traits. A total of 1,755 1-day-old Ross 308 male chicks was randomly divided in 3 experimental groups (9 replications/group): CON, fed a 4 feeding-phases commercial diet (dig Arg:Lys ratio = 1.05, 1.05, 1.06, 1.07, respectively in starter, grower I, grower II and finisher phase), and ARG2 and ARG3 groups fed CON diet supplemented respectively with 20 and 30% higher levels of crystalline L-arginine (dig Arg:Lys ratio = 1.25, 1.25, 1.26, 1.27 and 1.35, 1.35, 1.36, 1.37, respectively). Productive performance was recorded throughout the rearing cycle. At processing (43 d), breasts (n = 150/group) were randomly collected to evaluate the incidence and severity of white striping (WS), wooden breast (WB), and spaghetti meat (SM) defects (3-points scale). Meat quality traits, such as color, pH, drip and cook losses, marinade performances, and proximate composition were determined on 12 fillets/group. Although productive performance and meat quality traits resulted not significantly affected, the occurrence of some breast myopathies was modified by the dietary treatments. ARG2 and ARG3 exhibited a significantly higher percentage of breast without WS compared to CON (28 and 41 vs. 17%, respectively; P < 0.001). ARG3 reported the lowest percentage of breasts with severe WS (11 vs. 27 and 31%, respectively for ARG3, ARG2, and CON; P < 0.001) and the highest of those showing no SM abnormality (81 vs. 69 and 65%, respectively for ARG3, ARG2, and CON; P < 0.01). Furthermore, a numerical reduction of breasts with severe WB was observed in ARG3 (12 vs. 25 and 19%, respectively for ARG3, ARG2, and CON; P = 0.12). In conclusion, the dietary supplementation of arginine to increase the dig Arg:Lys ratio by about 30% in respect to the current recommendations for broiler chickens has positive implications on the occurrence of some breast meat abnormalities.
本研究旨在评估肉鸡日粮中不同可消化精氨酸与赖氨酸（dig Arg:Lys）比值对胸肌病的发生、生产性能和肉质特性的影响。将 1755 只 1 日龄 Ross 308 雄性小鸡随机分为 3 个实验组（每组 9 个重复）：CON，饲喂 4 个饲养阶段的商业日粮（起始阶段、生长 I 阶段、生长 II 阶段和育肥阶段的 dig Arg:Lys 比值分别为 1.05、1.05、1.06、1.07）；ARG2 和 ARG3 组饲喂 CON 日粮，分别添加 20%和 30%的结晶 L-精氨酸（dig Arg:Lys 比值分别为 1.25、1.25、1.26、1.27 和 1.35、1.35、1.36、1.37）。整个饲养周期记录生产性能。在加工（43 天）时，随机采集 150 只/组的胸肌，评估白条（WS）、木质胸肌（WB）和意大利面条肉（SM）缺陷的发生率和严重程度（3 分制）。对每组 12 块胸肉进行肉质特性，如颜色、pH 值、滴水和蒸煮损失、腌制性能和粗蛋白测定。尽管生产性能和肉质特性没有显著受到影响，但日粮处理会改变一些胸肌病的发生。与 CON 相比，ARG2 和 ARG3 表现出更高比例的无 WS 胸肌（分别为 28%和 41%比 17%；P < 0.001）。ARG3 报告的严重 WS 胸肌比例最低（11%比 ARG3、ARG2 和 CON 的 27%和 31%；P < 0.001），而无 SM 异常的胸肌比例最高（81%比 ARG3、ARG2 和 CON 的 69%和 65%；P < 0.01）。此外，ARG3 中严重 WB 胸肌的比例也有所减少（12%比 ARG3、ARG2 和 CON 的 25%和 19%；P = 0.12）。总之，与当前肉鸡推荐的日粮相比，日粮中添加精氨酸将 dig Arg:Lys 比值提高约 30%，对一些胸肉异常的发生有积极影响。
