García Elisa Mariana, López Agustín, Zimerman María, Hernández Olegario, Arroquy José Ignacio, Nazareno Mónica Azucena
Laboratory of Antioxidants and Oxidative Processes, Institute of Chemical Sciences, Faculty of Agronomy and Agroindustries, National University of Santiago del Estero, El Zanjón, Santiago del Estero, 4206, Argentina.
National Scientific and Technical Research Council- Argentina, Buenos Aires, C1425FQB, Argentina.
Asian-Australas J Anim Sci. 2019 Jan 3;32(9):1439-1447. doi: 10.5713/ajas.18.0537. Print 2019 Sep.
The aim of this study was to evaluate the effect of dietary incorporation of tannin-rich woody species on meat oxidative stability, carcass traits and meat quality in goats.
Two tannin-rich species were tested using a three-treatments feeding trial, where treatments consisted of: Larrea divaricata and Acacia aroma both at 12.5% in dry matter basis of the diet and a control diet (alfalfa hay). All feeding diets were iso-protein and iso-energy. Carcass conformation, carcass compactness, carcass fatness and subcutaneous fat deposition were evaluated. Intake, liveweigh, Longissimus thoracis et lumborum muscles of goats were analyzed in order to evaluate quality parameters such as pH value, instrumental color evaluation, water holding capacity, total phenolic content, antioxidant activity, meat oxidative stability and fatty acid profiles in meat.
Feed intake, liveweight gain, carcass and meat traits did not differ among treatments. Changes in meat lipid profile among treatments were observed for oleic and elaidic acid contents. Meat total phenolic content and antioxidant activity did not differ among treatments; although, meat oxidative status after storage at room temperature, as well as under refrigerated and frozen conditions were different between control and both supplemented groups.
The inclusion of Acacia aroma and Larrea divaricata leaves in goat diet enhanced meat oxidative stability. Modulation of the ruminal biohydrogenation of fatty acids produced by condensed tannins of these plant species need to be further investigated.
本研究旨在评估在山羊日粮中添加富含单宁的木本植物对肉的氧化稳定性、胴体性状和肉质的影响。
采用三处理饲养试验对两种富含单宁的植物进行测试，处理组包括：以干物质计，日粮中拉瑞阿属植物（Larrea divaricata）和阿拉伯金合欢（Acacia aroma）均占12.5%，以及对照日粮（苜蓿干草）。所有日粮均为等蛋白和等能量。评估胴体形态、胴体紧实度、胴体脂肪含量和皮下脂肪沉积。分析山羊的采食量、体重、胸腰最长肌，以评估肉质参数，如pH值、仪器颜色评估、持水力、总酚含量、抗氧化活性、肉的氧化稳定性和肉中的脂肪酸谱。
各处理组之间的采食量、体重增加、胴体和肉质性状没有差异。观察到各处理组之间油酸和反油酸含量的肉脂质谱变化。各处理组之间肉的总酚含量和抗氧化活性没有差异；尽管如此，对照组与两个添加组在室温、冷藏和冷冻条件下储存后的肉氧化状态不同。
在山羊日粮中添加阿拉伯金合欢叶和拉瑞阿属植物叶可提高肉的氧化稳定性。这些植物物种的缩合单宁对瘤胃脂肪酸生物氢化的调节作用有待进一步研究。
