کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8973815 | 1552516 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of copper bearing montmorillonite on the growth performance, intestinal microflora and morphology of weanling pigs
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
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چکیده انگلیسی
A total of 128 weaning pigs (Duroc Ã Landrace Ã Yorkshire) at an average initial body weight of 7.5 ± 0.6 kg were used to investigate the effects of copper bearing montmorillonite (Cu-MMT) on the growth performance, intestinal microflora, bacterial enzyme activities, and intestinal morphology. The pigs were allocated to four dietary treatments in a randomized complete block design (four replicates of eight pigs per replicate) for 45 days. The dietary treatments were: (1) basal diet, (2) basal diet + 1.5 g/kg MMT, (3) basal diet + 36 mg/kg copper as CuSO4 (equivalent to the copper in the Cu-MMT treatment group or (4) basal diet + 1.5 g/kg Cu-MMT. The results showed that supplementation with Cu-MMT improved (P < 0.05) growth performance, reduced (P < 0.05) the total viable counts of intestinal Clostridium and Escherichia coli, depressed (P < 0.05) the activities of intestinal β-glucosidase and β-glucuronidas, and increased (P < 0.05) villus height and the villus height to crypt depth ratio at the small intestinal mucosa as compared with control. Supplementation with MMT also increased (P < 0.05) villus height and the villus height to crypt depth ratio at the jejunum as compared with control. However, supplementation with MMT or CuSO4 had no (P > 0.05) effect on growth performance, intestinal microflora and bacterial enzymes as compared with control. Supplementation with CuSO4 had no (P > 0.05) effect on the small intestinal morphology as compared with control. Supplementation with Cu-MMT increased daily gain, decreased viable counts of Clostridium and E. coli and activity of β-glucuronidase in colonic contents (P < 0.05) as compared with MMT or CuSO4, and increased (P < 0.05) villus height and the villus height to crypt depth ratio at the small intestinal mucosa as compared with CuSO4. The results indicated that Cu-MMT is more effective than MMT or CuSO4 in enhancing the growth, intestinal microflora and morphology of weanling pigs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Feed Science and Technology - Volume 118, Issues 3â4, 4 February 2005, Pages 307-317
Journal: Animal Feed Science and Technology - Volume 118, Issues 3â4, 4 February 2005, Pages 307-317
نویسندگان
M.S. Xia, C.H. Hu, Z.R. Xu,