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《Chinese Journal of Animal and Veterinary Sciences》 2001-04
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EFFECT OF WEANING AGE ON SMALL INTESTINE MORPHOLOGY IN PIGLETS

WT5BZ]Gu Xianhong 1,Zhang Hongfu 1,She Ruiping 2, Li Changzhong 1,Fang Lu 1 [WT5BX](1 Institute of Animal Science,CAAS,Beijing,100094 China; 2 College of Animal Medicine,China Agricultural University)[WT5HZ]  
WT5BZ]Fifty four piglets were selected from 12 litters weaned at 17(group1)、21(group2)、28(group3) and 35(group4) days old respectively to determine effect of weaning age on small intestine morphology.Intestinal samples were taken at 12h,3d,1w,2w postweaning in group 1,at 12h,1w,2w,3w postweaning in group 2 and 3,and at all the same days as group 1、2、3 in group 4 from proximal duodenum,proximal jejunum,distal jejunum and middle ileum in each piglet.Villus height decreased much more and lasted for longer time (8~12 d postweaning) as piglet was weaned early.Crypt depth of duodenum and proximal jejunum decreased significantly in group I.Villus width decreased first and then increased at each location of intestine in each treatment.Intestine thickness changed more in group I.Villus height,crypt depth,and villus width of duodenum was the greatest among each location of intestine,but intestine wall of ileum was the thickest.All indexes of intestine mucose measured at each location in each treatment decreased to the least extent at 29 day and then rose significantly as piglet became old. [WT5HZ]
【Fund】: 国家自然科学基金资助项目 (39770 5 48);; 国家九五攻关项目 (96 0 0 9 0 1 0 6 0 4)
【CateGory Index】: S828
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