Effects of Supplementation on Digestive Enzyme Activities in Digestive Tract and Apparent Digestibility of Tibetan Sheep in Cold Season

JING Xiaoping; WANG Zhisheng; PENG Quanhui; ZOU Huawei; HU Rui; LI Qian; ZHOU Ting; PU Qijian; ZHANG Can; ZHAO Suonan; KONG Xiangying; ZHOU Yuqing

doi:10.3969/j.issn.1006-267x.2016.08.011

2016 , Vol. 28 >Issue 8: 2404 - 2413

DOI: https://doi.org/10.3969/j.issn.1006-267x.2016.08.011

RUMINANT AND HERBIVORE NUTRITION

Effects of Supplementation on Digestive Enzyme Activities in Digestive Tract and Apparent Digestibility of Tibetan Sheep in Cold Season

JING Xiaoping ,
WANG Zhisheng ,
PENG Quanhui ,
ZOU Huawei ,
HU Rui ,
LI Qian ,
ZHOU Ting ,
PU Qijian ,
ZHANG Can ,
ZHAO Suonan ,
KONG Xiangying ,
ZHOU Yuqing

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1. Animal Nutrition Institute, Sichuan Agricultural University, Ya'an 625014, China;
2. Haibei Demonstration Zone of Plateau Modern Ecological Husbandry Science and Technology, Haibei 810299, China

Received date: 2016-02-06

Online published: 2016-08-17

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Abstract

The aim of this study was to test the effects of urea-molasses lick block and concentrate supplementation on growth performance, digestive enzyme activities in digestive tract and apparent digestibility of Tibetan sheep in cold season. Eighteen Tibetan sheep ewes were selected and randomly assigned in 3 groups. Control (CON) group was provided with oat hay ad libitum, lick block supplementation (BS) group was provided with oat hay ad libitum and supplemented with urea-molasses lick block ad libitum, and concentrate supplementation (CS) group was provided with oat hay ad libitum and concentrate at 200 g/(ewe·d). After 60 d of feeding trial, 4 d of digestive trial was carried out, and finally all ewes were slaughtered. The results showed as follows:1) CS and BS groups ingested 29.67% and 11.37% more digestive energy, 40.00% and 20.00% more crude protein compared with CON group (P<0.05); 2) average daily gain (ADG) of CS and BS groups were 3.22 and 1.98 times as much as that of CON group (P<0.05); 3) the concentrations of glucose, total cholesterol, triglycerides, total protein, globulin and albumin in serum were significantly increased in both of CS and BS groups compared with CON group (P<0.05); 4) the apparent digestibility of dry matter, neutral detergent fiber and acid detergent fiber was significantly enhanced in both of CS and BS groups compared with CON group (P<0.05), and CS group was significantly higher than BS group(P<0.05); 5) the activities of the xylanase, proteinase and aminopeptidase in rumen fluid were significantly increased by nutritional supplementations (P<0.05), and CS group was significantly higher than BS group (P<0.05); the activities of alpha-amylase and trypsase were improved in CS group compared with CON group (P<0.05). It is concluded that the intakes of energy, protein and trace elements of Tibetan sheep can be significantly increased by urea-molasses lick block or concentrate supplementation in cold season, which also can significantly increase digestive enzyme activities, and finally improve the apparent digestibility and growth performance; under the conditions of the present study, the more energy and protein intakes by nutritional supplementation are, the better growth performance in Tibetan sheep appears.

Key words： Tibetan sheep; nutrition supplement way; digestive enzyme activity; apparent digestibility; growth performance

Cite this article

JING Xiaoping , WANG Zhisheng , PENG Quanhui , ZOU Huawei , HU Rui , LI Qian , ZHOU Ting , PU Qijian , ZHANG Can , ZHAO Suonan , KONG Xiangying , ZHOU Yuqing . Effects of Supplementation on Digestive Enzyme Activities in Digestive Tract and Apparent Digestibility of Tibetan Sheep in Cold Season[J]. Chinese Journal of Animal Nutrition, 2016 , 28(8) : 2404 -2413 . DOI: 10.3969/j.issn.1006-267x.2016.08.011

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