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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.18.0901    [Accepted] Published online March 7, 2019.
Effect of tannins and cellulase on growth performance, nutrients digestibility, blood profiles, intestinal morphology and carcass characteristics in Hu sheep
M. D. Zhao1,*, L. F. Di1, Z. Y. Tang1, W. Jiang1, C. Y. Li1,2,*
1Agricultural College of Yanbian University, Jilin 133002, China
2Innovation Center of Beef Cattle Science and Industry Technology in Yanbian University, Jilin 133002, China
Correspondence:  M. D. Zhao, Tel: +86-0431-2435519, Fax: +86-0431-2435519, Email: Zmdi0807@126.com
C. Y. Li,Email: 2550492566@qq.com
Received: 4 December 2018   • Revised: 11 February 2019   • Accepted: 27 February 2019
Abstract
Objective: This study was conducted to evaluate the effects of tannins and cellulase on growth performance, nutrient digestibility, blood profiles, intestinal morphology and carcass characteristics in Hu sheep.

Methods

A total of 48 three-month-old meat Hu sheep (25.05 ± 0.9 kg) were blocked based on body weight, and randomly allotted to 4 treatments with 3 replicates of 4 sheep each. The experiment lasted for 80 d, and dietary treatments were as follows: (1) CON, control diet; (2) TAN, CON + 0.1% tannins; (3) CEL, CON + 0.1% cellulase; (4) TAN+ CEL, CON + 0.1% tannins and 0.1% cellulase.

Results

Compared with CON, CEL and TAN+CEL had greater (P<0.05) final birth weight (FBW) and average daily gain but lower (P<0.05) F/G, while FBW of TAN+CEL was lower (P<0.05) than that of CEL. The apparent total tract digestibility (ATTD) of DM in TAN, CEL and TAN+CEL groups were higher (P<0.05) than that in CON. CEL and TAN+CEL groups had greater (P<0.05) ATTD of CF compared with TAN and CON, while TAN group had lower (P<0.05) ATTD of CP than other treatments. TAN, CEL and TAN+CEL groups increased (P<0.05) serum globulin and alkaline phosphatase but decreased (P<0.05) A/G. Serum total protein was greatest for TAN+CEL, intermediate for TAN and CEL and least for CON (P<0.05). TAN+CEL group increased (P<0.05) dressing percentage compared with CON, while the backfat thickness of CEL was lower (P<0.05) than that of CON. The villus height of jejunum and ileum in CEL and TAN+CEL groups were greater (P<0.05) than that in CON, and the crypt depth and villus height: crypt depth of jejunum were increased (P<0.05) in TAN, CEL and TAN+CEL groups.
Conclusion
The addition of tannins and cellulase together promoted nutrient digestion, liver protein synthesis and intestinal development and thus improved growth performance and carcass characteristics.
Keywords: Tannins; Cellulase; Growth Performance; Nutrient Digestibility; Blood Profiles; Intestinal Morphology


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