Abstract | BACKGROUND: This study was carried out to investigate effects of threonine levels on growth, digestive and absorptive capacity and antioxidant status in intestine and hepatopancreas of sub-adult grass carp (Ctenopharyngodonidella). RESULTS:
Weight gain, specific growth rate, feed intake and feed efficiency were significantly improved by dietary threonine (P < 0.05). Intestinal activities of trypsin, chymotrypsin, alpha-amylase, lipase, alkaline phosphatase, γ- glutamyl transpeptidase and creatine kinase took the similar trends. Contents of malondialdehyde and protein carbonyl in intestine and hepatopancreas were significantly decreased by dietary optimal threonine supplementation (P < 0.05). Anti- superoxide anion capacity, anti- hydroxyl radical capacity, glutathione content and activities of superoxide dismutase, catalase and glutathione-S-transferase in intestine and hepatopancreas were enhanced by dietary threonine (P < 0.05). CONCLUSIONS: Dietary threonine could improve growth, enhance digestive and absorptive capacity and antioxidant status in intestine and hepatopancreas of sub-adult grass carp. The dietary threonine requirement of sub-adult grass carp (441.9-1,013.4 g) based on weight gain was 11.6 g/kg diet or 41.5 g/kg of dietary protein by quadratic regression analysis.
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Authors | Yang Hong, Weidan Jiang, Shengyao Kuang, Kai Hu, Ling Tang, Yang Liu, Jun Jiang, Yongan Zhang, Xiaoqiu Zhou, Lin Feng |
Journal | Journal of animal science and biotechnology
(J Anim Sci Biotechnol)
Vol. 6
Issue 1
Pg. 34
( 2015)
ISSN: 1674-9782 [Print] England |
PMID | 26257911
(Publication Type: Journal Article)
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