| The fermented citrus pulp is a kind of feedstuffs, which is rich in vitamins, minerals, flavonoids, carotenoids, amino acids. This experiment was conducted to study the feeding value of fermented citrus pulp on weaned piglets and the mechanism of fermented citrus pulp on weaned piglet intestinal function.Seventy-two Duroc×Landrace×Yorkshire piglets were weaned at28days of age and randomly allotted into three groups in a completely randomized block design with6replicates per group and4pigs per replicate. Weaned piglets in group I were fed diets with antibiotics, weaned piglets in group Ⅱ were fed diets with no addition of antibiotics, weaned piglets in group Ⅲ were fed diets with8%fermented citrus pulp, The trial lasted for48days. The study on production performance, serum-biochemical indices, and intestinal function of the weaned piglets was carried out. The results showed:1. Average daily gain (ADG) of fermented citrus pulp group was insignificantly higher than antibiotics group (P＞0.05); There was no significance between antibiotics group and control group (P＞0.05). Fermented citrus pulp group had insignificantly higher average daily feed intake and lower F/G than antibiotics group and control group(P＞0.05); Compared with control group, antibiotics group and fermented citrus pulp group had significantly decreased the incidence of diarrhea(P＜0.01), and fermented citrus pulp group was better than antibiotics group (P＞0.05).2. There was no significance observed for spleen index and stomach index among the treatments (P＞0.05). Compared with control group, fermented citrus pulp group had no significantly increased stomach index (P＞0.05). Liver index of fermented citrus pulp group were significantly (P＜0.05) higher than control group.3. There was no significance observed for stomach, duodenum pH in weaned piglets among the treatments (P＞0.05). Compared with control group, the jejunum pH of fermented citrus pulp significantly decreased (P＜0.05), fermented citrus pulp group and antibiotics group compared with control group, jejunum pH decreased by5.07%、6.97%, ileum pH decreased by6.30%、13.04%. Compared with antibiotics group, ileum pH of fermented citrus pulp group decreased by2.3%(P＞0.05). 4. Serum-biochemical indices, no significant effect existed in aspartate aminotransferase (AST), AST/ALTAST/ALT, totalprotein (TP), albumin (ALB), globulin (GLO) of serum in weaned piglets of all groups (P>0.05), significant effect existed in glucose, urea nitrogen (UN), glutamic pyruvic transaminase (GPT), alkaline phosphatase (ALP)(P<0.05). Compared with control group, GLU of fermented citrus pulp group significantly increased; Glutamic pyruvic transaminase (GPT) of fermented citrus pulp group and antibiotics group extremely were significantly (P＜0.01) higher than that of control group, ALP of them were insignificantly different from control group(P＞0.05). TP、ALB、GLO and A/G of each group had no significant diferences (P＞0.05).5.(1)Intestinal flora:There is significance observed for lactobacillus among the treatments (P＜0.05), compared with control group, fermented citrus pulp group had significantly increased lactobacillus, antibiotics group decreased lactobacillus (P＜0.05); E.coli in jejunum was significantly lower than control group (P＜0.05); Lactobacillus in appendix of antibiotics group was significantly lower than control group and fermented citrus pulp group (P＜0.05);(2)Intestinal morphology:Compared with control group, villus height of fermented citrus pulp group significantly increased (P＜0.01), crypt depth significantly decreased (P＜0.05); V/C of fermented citrus pulp group was significantly higher than control group (P＜0.01).Overall, the fermented citrus pulp can improve production performance of weaned piglets. The results of this study also suggested that fermented citrus pulp promote the growth of intestinal villi, lower crypt depth, and improve digestion and absorption capacity, thereby improving the use of nutrition substances. |
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