Whole-plant silage maize to improve fiber digestive characteristics and intestinal microbiota of Hezuo pigs

作者：Longlong Wang, Pengfei Wang, Zunqiang Yan, Pengxia Zhang, Xitong Yin, Rui Jia, Yao Li, Jiaojiao Yang, Shuangbao Gun, Qiaoli Yang · 发表于：Frontiers in Microbiology · 年份：2024 · DOI：10.3389/fmicb.2024.1360505 · 被引用次数：11 · 研究领域：Animal Nutrition and Physiology、Effects of Environmental Stressors on Livestock、Ruminant Nutrition and Digestive Physiology

Introduction Utilizing roughage resources is an effective approach to alleviate the shortage of corn-soybean feed and reducing the costs in the swine industry. Hezuo pig is one group of plateau type local Tibetan pig with strong tolerance to crude feeding. Nevertheless, current research on the roughage tolerance in Hezuo pigs and the microbiological mechanisms behind it is still minimally.This study explored the impact of various ratios of whole-plant silage (WPS) maize on the pH, cellulase activity, short-chain fatty acids (SCFAs), and intestinal microbiota in Hezuo pigs. Methods Thirty-two Hezuo pigs were randomly divided into four groups ( n = 8). The control group received a basal diet, while experimental groups I, II, and III were given diets with incremental additions of 5%, 10%, and 15% air-dried WPS maize, respectively, for 120 days. Results The findings revealed that compared with the control group, in Group II, the pH of cecum and colon were notably decreased ( p < 0.05), while acid detergent fiberdigestibility, the concentration of propionic and isobutyric acid in the cecum, and the concentration of isobutyric acid in the colon were significantly increased ( p < 0.05). Also, carboxymethyl cellulase activity in the cecum in group II of Hezuo pigs was significantly higher than that in the other three groups ( p < 0.05). Furthermore, the cecum microbiota showed a higher diversity in the group II of Hezuo pigs than that in the control group, as sho...