Effects of Feeding Pattern on Growth Performance, Nutrient Digestibility and Gut Microbiota Composition of Growing Pigs
CAO Shan-chuan;XU Ming-zhu;ZHANG Li;YAN Hong-Lin;ZHANG Hong-fu;LIU Jing-bo;School of Life Science and Engineering, Southwest University of Science and Technology;State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences;Beijing Zhong Nong Hong Ke Biotechnology Co., Ltd;
The present study was conducted to investigate the effects of feeding pattern(pigs were fed either ad libitum or 3 meals per day) on the growth performance, nutrient digestibility and gut microbiota composition in growing pigs. A total of 120 growing pigs(initial BW 26.0±0.4 kg) were assigned into two groups in which pigs were fed ad libitum(FA) or three meals per day(M3) according to the BW and gender of pigs. There were ten replicates in each treatment group with 6 pigs per replicate. This experiment lasted 28 days. The results showed that the average daily feed intake and feed gain ratio in M3 group were lower than that in FA group(P0.05). No significant difference was observed for apparent total tract digestibility(ATTD) of nutrient between treatments(P0.05). Pigs fed with 3 meals per day exhibited lower plasma concentrations of nonesterified fatty acids and urea nitrogen(P0.05), but higher concentration of insulin compared to pigs fed ad libitum(P0.01). At the phylum level, relative abundance of bacteroidetes of pigs in M3 groups was lower than that in FA groups(P0.05). However, the relative abundance of tenericutes and verrucomicrobia in FA groups were greater than that in M3 groups(P 0.05). At the genus level, the pigs fed with 3 meals per day exhibited greater relative abundances of Prevotellaceae_UCG-003 Ruminococcaceae_UCG-010 Ruminococcaceae_NK4A214_group Rikenellaceae_RC9_gut_group and Coprostanoligenes_group proportion than pigs fed ad libitum(P0.05). The fed ad libitum pigs exhibited greater relative abundances of Selenomonas Roseburia Prevotella_2 Prevotella_7 Prevotella_9 Alloprevotella and Alloprevotella compared with the pigs fed with 3 meals per day(P0.05). In summary, feeding frequency had no effect on nutrient digestibility, but less frequent feeding altered gut microbiota composition and improved feed efficiency in growing pigs.
【Fund】： 四川省科技计划资助(2018JY0225);; 四川省教育厅资助科研项目(17ZA0413)
【CateGory Index】： S828.5
【CateGory Index】： S828.5