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Effects Of Sodium Butyrate On Growth Performance And Gastrointestinal Tract Environment Of Yangzhou Goslings

Posted on:2013-07-03Degree:MasterType:Thesis
Country:ChinaCandidate:F X CaiFull Text:PDF
GTID:2233330395990614Subject:Animal Nutrition and Feed Science
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The experiment was conducted to study the effects of coated sodium butyrate (SB) on the growth performance and gastrointestinal tract environment of0~4weeks Yangzhou goslings. The research approached the mechanism of action of Yangzhou goslings provided with SB, determined the eligible adding level of SB in gosling, which will provide the experimental basis and scientific guidance for the rational use of sodium butyrate.Ninety1-day-old Yangzhou goslings were allocated to3treatments each consisted of three replications of ten goslings. Three groups were fed with basal diet(control group), diets supplemented with coated SB at the level of500mg/kg(experimental group Ⅰ),750mg/kg(experimental group Ⅱ). The diets were fed between1and28days of age. The experimental diets and water were available ad libitum during the entire experimental period. At28th days,2goslings per replicate of each group were randomly selected, in order to determinate the enzymatic activity of small intestine and caecum microorganism. At29th day,2goslings per replicate of each group were randomly selected, in order to determinate the pH of glandular stomach, small intestine and caecum; internal organs were taken out and weighed; duodenum, jejunal and ileum were taken out and made paraffin section for morphometrics; feed consumption was recorded every day, and body weight were taken at second and fourth week. Results were showed as follows:1.Compared with the control group, average daily feed intake(ADFI)was lower in the first two weeks; in the second two weeks and the total period, the control group’s ADFI was lower than the experimental groups, but there was no significance among them(P>0.05). Average daily gain(ADG)was gradually increased to28day compared with the control group. Body weight of14-day-old and28-day-old goslings with diets supplemented with coated SB significantly increased(P<0.05). and the feed conversion rate of group Ⅱ of14-day-old goslings came up to remarkable level(P<0.01). The relative weight of intestinal tract of28-day-old goslings with diets supplemented with coated SB significantly reduced(P<0.05). There was no significant difference of groups(P>0.05) on the length of intestine.2.The pH of glandular stomach reduced significantly with the adding of SB on the diet, the pH of small intestine reduced also, but the difference among groups wasn’t apparently. In the experimental groups, Amylase activity of jejunum and ileum were significantly higher than the control group(P<0.05), however, duodenum was just higher a little(P>0.05). In the experimental groups, tryptic activity of duodenum and jejunum were significantly higher than the control group(P<0.05), however, ileum was just higher a little(P>0.05).3.The diets supplemented with coated SB increased the intestinal villus height of28-day-old Yangzhou goslings in different degree, villus height of duodenum and jejunum were significantly higher than the control group(P<0.05), however, ileum was just higher a little(P>0.05); reduced the intestinal crypt depth of28-day-old Yangzhou goslings in different degree, crypt depth of duodenum and ileum were significantly higher than the control group(P<0.05), however, jejunum was just lower a little(P>0.05); increased the intestinal villus width and intestinal wall thickness of28-day-old Yangzhou goslings in different degree, however, villus width and intestinal wall thickness of duodenum, jejunum and ileum were not significantly higher than the control group(P<0.05); increased the V/C of28-day-old Yangzhou goslings in different degree, V/C of duodenum and ileum were very significantly higher than the control group(P<0.01), while jejunum was significantly high(P<0.05). The diets supplemented with coated SB increased the number of Lactobacillus of caecum of28-day-old Yangzhou goslings in different degree, but there was no significant difference among the groups(P>0.05); decreased the number of Escherichia coli of caecum of28-day-old Yangzhou goslings in different degree, the experimental Ⅰ was significantly lower than the control group(P<0.05), the experimental Ⅱ was very significantly lower than the control group(P<0.01).In conclusion, under the experimental conditions, the experimental groupⅡ(500mg/kg adding coated sodium butyrate)effects of the growth performance and digestive tract development were best, which produced impact by the digestive enzyme activity, the number of microflora and the intestinal morphology.
Keywords/Search Tags:sodium butyrate, Yangzhou Goslings, growth performance, enzymic activity, microflora, intestinal morphology
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