日粮中添加桑叶粉对藏猪生长性能、胴体性状和肉质的影响。

The Effects of Dietary Inclusion of Mulberry Leaf Powder on Growth Performance, Carcass Traits and Meat Quality of Tibetan Pigs.

作者信息

Wang Sutian, Tang Cuiming, Li Jianhao, Wang Zhenjiang, Meng Fanming, Luo Guoqing, Xin Haiyun, Zhong Jianwu, Wang Yuan, Li Baohong, Li Zhiyi, Chen Lian, Hu Bin, Lin Sen

机构信息

Key Laboratory of Livestock and Poultry Breeding, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China.

Laboratory of Urban Agriculture in South China, Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China.

出版信息

Animals (Basel). 2022 Oct 12;12(20):2743. doi: 10.3390/ani12202743.

This research was conducted to study the effects of dietary inclusion of mulberry leaf powder (MLP) on growth performance, meat quality, antioxidant activity, and carcass traits of Tibetan pigs. Eighteen Tibetan pigs (33.8 ± 1.1 kg) were assigned to two treatment groups randomly and received either the control diet (CON) or a basal diet containing 8% MLP (MLP) for two months. After the two-month feeding trial, the MLP group showed lower backfat thickness while a higher lean percentage. Compared with CON pigs, MLP pigs had higher serum CAT activity. In addition, dietary MLP supplementation significantly decreased the muscle shear force. Muscle fiber morphology analysis showed that MLP pigs had larger muscle fiber density while smaller muscle fiber cross-sectional area. Up-regulated gene expression of myosin heavy chain (MyHC)IIa was also observed in MLP pigs. These results indicate that the enhanced antioxidant activity and altered muscle fiber type and morphology appeared to contribute to the improvement of meat quality in Tibetan pigs fed diets containing MLP.

本研究旨在探讨日粮中添加桑叶粉（MLP）对藏猪生长性能、肉质、抗氧化活性和胴体性状的影响。18头藏猪（33.8±1.1千克）被随机分为两个处理组，分别饲喂对照日粮（CON）或含8% MLP的基础日粮（MLP），为期两个月。经过两个月的饲养试验，MLP组的背膘厚度较低，瘦肉率较高。与CON组猪相比，MLP组猪的血清CAT活性较高。此外，日粮中添加MLP显著降低了肌肉剪切力。肌肉纤维形态分析表明，MLP组猪的肌肉纤维密度较大，而肌肉纤维横截面积较小。在MLP组猪中还观察到肌球蛋白重链（MyHC）IIa的基因表达上调。这些结果表明，抗氧化活性增强以及肌肉纤维类型和形态的改变似乎有助于改善饲喂含MLP日粮的藏猪的肉质。