Liu Riliang, He Jianwen, Ji Xu, Zheng Weijiang, Yao Wen
Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
Clinical Research Center, Affiliated Hospital of Shaanxi University of Chinese Medicine, Shaanxi University of Chinese Medicine, Xianyang 712000, China.
Animals (Basel). 2021 Apr 19;11(4):1166. doi: 10.3390/ani11041166.
In this paper, we investigated the effects of a diet with a moderate reduction of dietary crude protein (CP) level, supplemented with five crystalline amino acids (Lys, Met, Thr, Try, and Val), on the growth, metabolism, and fecal microbiota of Sushan nursery pigs. Seventy Sushan nursery pigs with an average body weight of 19.56 ± 0.24 kg were randomly allocated to two experimental dietary treatments: 18% CP (high protein; group HP), and 15% CP (low protein; group LP). We found that the differences in the two diets had no significant effect on the growth performance of Sushan nursery pigs. Nursery pigs on the 15% CP diet showed significantly improved protein, amino acid, and energy utilization. Furthermore, the LP diet cloud optimized the gut microflora composition to some extent. The functional structure of bacterial communities implied improved metabolic capabilities in group LP. Additionally, correlation analysis between fecal microbiota and metabolic profiles confirmed that the increase of beneficial bacterial in the feces was beneficial to the health and metabolism of the nursery pigs. In conclusion, a moderate reduction in the dietary protein level can improve growth and metabolism due to the improvement of intestinal microbiota in Sushan nursery pigs. This finding could provide useful reference data for the application of a different nutrition strategy in indigenous pig production.
在本文中，我们研究了适度降低日粮粗蛋白（CP）水平并补充五种晶体氨基酸（赖氨酸、蛋氨酸、苏氨酸、色氨酸和缬氨酸）的日粮对苏山保育猪生长、代谢和粪便微生物群的影响。70头平均体重为19.56±0.24千克的苏山保育猪被随机分配到两种试验日粮处理组：18%CP（高蛋白组；HP组）和15%CP（低蛋白组；LP组）。我们发现，两种日粮之间的差异对苏山保育猪的生长性能没有显著影响。采食15%CP日粮的保育猪蛋白质、氨基酸和能量利用率显著提高。此外，LP日粮在一定程度上优化了肠道微生物群组成。细菌群落的功能结构表明LP组的代谢能力有所提高。此外，粪便微生物群与代谢谱之间的相关性分析证实，粪便中有益细菌的增加有利于保育猪的健康和代谢。总之，日粮蛋白质水平适度降低可因苏山保育猪肠道微生物群的改善而提高生长和代谢。这一发现可为本土猪生产中应用不同营养策略提供有用的参考数据。
