胍基乙酸对肉鸡肉品质和腹脂沉积的影响

doi:10.16431/j.cnki.1671-7236.2023.04.010

摘要/Abstract

摘要： 【目的】试验旨在探究胍基乙酸(guanidinoacetic acid,GAA)对肉鸡肉品质和腹脂沉积的影响。【方法】选取1日龄科宝肉仔鸡90只,随机分为3组,每组5个重复,每个重复6只鸡。试验Ⅰ组(对照组)饲喂基础饲粮,试验Ⅱ、Ⅲ组分别在基础饲粮中添加1.2和3.6 g/kg GAA。饲养周期为42 d。于42日龄采集胸肌、腿肌、肝脏、腹部脂肪及血液样品,测定肉品质、肌肉病及腹脂沉积相关指标。【结果】与试验Ⅰ组相比,试验Ⅱ、Ⅲ组胸肌和腿肌pH_{45 min}极显著或显著增加(P＜0.01;P＜0.05);试验Ⅱ组胸肌肉色b^*值、腿肌肉色a^*值和失水率均极显著增加(P＜0.01),腿肌肉色L^*值、木质肉与白纹肉发生率均显著降低(P＜0.05);试验Ⅲ组木质肉发生率显著升高(P＜0.05)。试验Ⅱ组腹脂率、腹脂细胞直径均显著低于试验Ⅰ、Ⅲ组(P＜0.05),血清甘油三酯(TG)水平显著高于试验Ⅰ、Ⅲ组(P＜0.05)。【结论】饲粮中添加1.2 g/kg GAA能显著改善肉鸡肌肉品质,减少胸肌木质肉、白纹肉的发生,显著降低腹脂沉积。

关键词: 胍基乙酸(GAA); 肉鸡; 肉品质; 木质肉; 白纹肉; 腹脂沉积

Abstract: 【Objective】 The purpose of this experiment was to study the effects of guanidinoacetic acid (GAA) on the meat quality and abdominal fat deposition of broilers.【Method】 In this experiment,90 1-day-old Cobb broilers were selected and randomly divided into 3 groups,with 5 replicates and 6 broilers per replicate.The group Ⅰ (control group) was fed with basal diet,groups Ⅱ and Ⅲ were added with 1.2 and 3.6 g/kg GAA in basal diet,respectively.The feeding cycle was 42 days,at the end of experiment (42 days),the breast muscle,leg muscle,liver,abdominal fat and blood samples were collected to measure meat quality,pectoralmyopathies and abdominal fat deposition.【Result】 Compared with group Ⅰ,pH_{45 min} of pectoralis and leg muscle in groups Ⅱ and Ⅲ were extremely significantly or significantly increased (P＜0.01 or P＜0.05),the b^* value of pectoralis,a^* value and water loss rate of leg muscle in group Ⅱ were extremely significantly increased (P＜0.01),L^* value of leg muscle,the incidences of wooden breast and white striping in group Ⅱ were significantly decreased (P＜0.05),and the incidences of wooden breast in group Ⅲ was significantly increased (P＜0.05).The abdominal fat rate and abdominal adipocytes diameter in group Ⅱ was significantly lower than that in groups Ⅰ and Ⅲ (P＜0.05).The level of serum triglyceride (TG) in group Ⅱ was significantly higher than that in groups Ⅰ and Ⅲ (P＜0.05).【Conclusion】 Supplementation of 1.2 g/kg GAA in diet could improve the meat quality of broilers,reduce the occurrence of pectoral wooden breast and white striping in broilers, and significantly reduce abdominal fat deposition.

Key words: guanidinoacetic acid (GAA); broilers; meat quality; wooden breast; white striping; abdominal fat deposition

中图分类号:

S831.2

李梦媛, 刘梦潜, 康佳佳, 黄英, 段勇, 贾俊静, 葛长荣, 曹玮娜. 胍基乙酸对肉鸡肉品质和腹脂沉积的影响[J]. 中国畜牧兽医, 2023, 50(4): 1385-1394.

LI Mengyuan, LIU Mengqian, KANG Jiajia, HUANG Ying, DUAN Yong, JIA Junjing, GE Changrong, CAO Weina. Effects of Guanidinoacetic Acid on Meat Quality and Abdominal Fat Deposition in Broilers[J]. China Animal Husbandry and Veterinary Medicine, 2023, 50(4): 1385-1394.

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