Center of Excellence for Poultry Science, University of Arkansas, Fayetteville, AR.
Department of Food Science, University of Arkansas, Fayetteville, AR.
J Anim Sci. 2018 Sep 7;96(9):3757-3767. doi: 10.1093/jas/sky238.
Phytogenics have been reported to improve growth performances in farm animals and are thereby considered as potential key solutions for antibiotic-free livestock nutrition. Yet, their effects on meat quality are still not well defined; therefore, the aim of this study was to determine the effects of 5 experimental phytogenic additives (3 dietary and 2 water supplements) on growth and meat quality in broilers. One-day-old broiler chicks (n = 576) were assigned to 48 floor pens and divided into 6 treatments (Control, AV/HGP/16 premix [AVHGP], Superliv concentrate premix [SCP], bacteriostatic herbal growth promotor [BHGP], AV/SSL/12 [AVSSL], and Superliv Gold [SG]) in a complete randomized design (8 pens/treatment with 12 birds/pen, and 96 birds/group). Feed intake and BW were recorded, and birds were processed at 42 d to evaluate carcass traits. Breast muscle tissues were excised to determine stress- and antioxidant-related genes expression. Both AVSSL- and SG-treated broilers produced heavier (P < 0.05) slaughter weights compared with the control-fed broilers, whereas AVSSL supplementation decreased (P < 0.05) fat pad size and increased (P < 0.05) breast weights compared with the control-fed broilers. Although pH and a* values remained unchanged, L* was decreased (P < 0.05) in all treatment and b* was reduced (P < 0.05) in SG when compared with controls. The trained sensory panelists detected more (P < 0.05) green herb flavor in the breast meat from AVHGP than SCP, SG, and control birds. The expression of superoxide dismutase 2, extracellular signal-regulated kinase 1/2, and JNK gene was upregulated in AVHGP and BHGP compared with the control (P < 0.05). Together, these results indicated that phytogenic additives might improve meat quality of broilers through modulation of stress- and antioxidant-related pathways.
植物源产品被报道可改善农场动物的生长性能，因此被认为是抗生素替代型畜牧业营养的潜在关键解决方案。然而，其对肉质的影响尚不清楚；因此，本研究旨在确定 5 种实验性植物源添加剂（3 种日粮和 2 种水添加剂）对肉鸡生长和肉质的影响。将 1 日龄肉鸡雏鸡（n = 576）分配到 48 个地面围栏中，并分为 6 个处理组（对照、AV/HGP/16 预混料[AVHGP]、Superliv 浓缩预混料[SCP]、抑菌草药生长促进剂[BHGP]、AV/SSL/12[AVSSL]和 Superliv Gold[SG]），采用完全随机设计（每个处理 8 个围栏，每个围栏 12 只鸡，每组 96 只鸡）。记录采食量和 BW，并在 42 天进行屠宰以评估胴体特性。取出胸肌组织以确定应激和抗氧化相关基因的表达。与对照组相比，AVSSL 和 SG 处理的肉鸡屠宰体重更重（P < 0.05），而 AVSSL 可减少（P < 0.05）脂肪垫的大小并增加（P < 0.05）胸肌重量。尽管 pH 值和 a值保持不变，但与对照组相比，所有处理组的 L值降低（P < 0.05），SG 组的 b*值降低（P < 0.05）。受过训练的感官品尝员在 AVHGP 组的胸肉中检测到更多（P < 0.05）的青草味，而在 SCP、SG 和对照组中则较少。与对照组相比，AVHGP 和 BHGP 中超氧化物歧化酶 2、细胞外信号调节激酶 1/2 和 JNK 基因的表达上调（P < 0.05）。总之，这些结果表明，植物源添加剂可通过调节应激和抗氧化相关途径来改善肉鸡的肉质。
