Effects of Liquid-Feeding Mixed Meal Diets on Growth Performance,Nutrient Digestibility and Contents of Serum Inflammatory Factors and Fecal Short-Chain Fatty Acids of Growing Pigs
This experiment aimed to explore the effects of liquid-feeding mixed meal diets on growth perform-ance,nutrient digestibility and contents of serum inflammatory factors and fecal short-chain fatty acids(SCFAs)of growing pigs.A total of 126"Duroc×Landrace×Yorkshire"crossbred pigs with an average body weight of(30.00±4.26)kg were randomly divided into three groups with seven replicates per group and six pigs per replicate.Pigs in experimental group Ⅰ were fed a soybean meal-based pellet diet;those in experi-mental group Ⅱ were fed a mixed meal-based pellet diet which consisted of double-low rapeseed meal,corn germ meal,sprayed corn skin and rice bran instead of soybean meal and corn;and those in experimental groupⅢ were fed a mixed meal-based liquid diet,which was prepared by adding 2.7 times water to the mixed meal-based diet and mixing well.The nutrient levels of the diets were similar among groups.The experiment lasted for 56 days.The results showed as follows:1)during the whole experiment,compared with experimental group Ⅰ,the average daily feed intake and average daily gain in experimental group Ⅱ were decreased by 2.29％and 5.33％(P＞0.05),respectively;the feed to gain ratio(F/G)was increased by 3.40％(P＞0.05).Compared with experimental group Ⅱ,the average daily feed intake and average daily gain in experimental group Ⅲ were increased by 7.04％(P＜0.05)and 6.32％(P＞0.05),respectively.2)The digestibilities of dry matter,gross energy and crude protein in experimental groups Ⅱ and Ⅲ were extremely significantly lower than those in experimental group Ⅰ(P＜0.01),and the digestibilities of ether extract,phosphorus and ash were significantly lower than those in experimental group Ⅰ(P＜0.05).There was no significant difference in digestibilities of various nutrients between experimental group Ⅱ and experimental group Ⅲ(P＞0.05).3)The butyric acid content in feces in experimental group Ⅲ was significantly higher than that in experimental group Ⅱ(P＜0.05),and there was no significant difference compared with experimental group Ⅰ(P＞0.05).4)Compared with experimental group Ⅰ,the serum interleukin-10(IL-10)content in experimental groups Ⅱand Ⅲ was extremely significantly increased(P＜0.01),and the serum contents of interleukin-1β(IL-1β)and tumor necrosis factor-α(TNF-α)in experimental group Ⅱ were significantly increased(P＜0.05).Com-pared with experimental group Ⅱ,the serum IL-1β content in experimental group Ⅲ was significantly de-creased(P＜0.05),and the serum contents of interleukin-6(IL-6),interleukin-2(IL-2)and TNF-α were de-creased to some extent but did not reach significant levels(P＞0.05).In conclusion,compared with soybean meal-based pellet diet,feeding mixed meal-based pellet diet reduces feed intake and nutrient digestibility,and increases serum contents of inflammatory factors of growing pigs.While feeding mixed meal-based liquid diet can improve the diet palatability,increase the feed intake,and reduce the serum proinflammatory factor IL-1βcontent,but has no effects on nutrient digestibility.[Chinese Journal of Animal Nutrition,2024,36(1):151-161]
万方数据
维普
