Effects of Fattening Patterns on Enzyme Activities of Digestive Tract of Hulun Buir Lambs and F1 Hybrid Lambs of Hulun Buir and Dorper Sheep

SUN Juan, YAN Sumei, ZHANG Ying, WU Tiemei, WANG Xinpeng, CHANG Chencheng, GUO Xiaoyu

doi:10.3969/j.issn.1006-267x.2015.05.030

2015 , Vol. 27 >Issue 5: 1577 - 1585

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.05.030

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Effects of Fattening Patterns on Enzyme Activities of Digestive Tract of Hulun Buir Lambs and F1 Hybrid Lambs of Hulun Buir and Dorper Sheep

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College of Animal Sciences, Inner Mongolia Agricultural University, Hohhot 010018, China

Received date: 2014-11-25

Online published: 2015-05-13

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Abstract

This trial was conducted to investigate the effects of fattening patterns on enzyme activities of small intestine and pancreas of Hulun Buir lambs and F1 Hybrid lambs of Hulun Buir sheep and Dorper sheep. A 2×2 complete random design was used, factor 1 was fattening pattern, including natural pasture and natural pasture+concentrate supplementation; factor 2 was species, including Hulun Buir lambs and F1 Hybrid lambs of Hulun Buir sheep (♀) and Dorper sheep (♂). A total of 120 healthy lambs (60 of each specie) with close body weight were selected, and lambs of each specie were divided into 2 groups with 30 lambs per group. The trial lasted for 60 days consisted of an early fattening period and a late fattening period. Fattening method of natural pasture+concentrate supplementation group was that supplemented 0.27 kg concentrate per lamb everyday in early fattening period, and 0.53 kg per lamb everyday in late fattening period. At the end of the trial, five lambs from each group were slaughtered, and small intestine and pancreas samples were collected to determine enzyme activities. The results showed as follows: comparing with natural pasture, natural pasture+concentrate supplementation could significantly increase the activities of trypsin, lipase and chymotrypsin of duodenum, and those of amylase, lipase and trypsin of jejunum, ileum and pancreas (P<0.05). Comparing with Hulun Buir lambs, the activities of amylase and chymotrypsin of duodenum, and those of trypsin and lipase of jejunum and ileum of F1 Hybrid lambs of Hulun Buir sheep and Dorper sheep were significantly increased. Trypsin activity of duodenum and lipase activity of pancreas tended to be increased (0.05≤ P< 0.10). In conclusion, comparing with natural pasture, natural pasture+concentrate supplementation can increase enzyme activities of small intestine and pancreas, furthermore, enzyme activities of F1 Hybrid lambs of Hulun Buir sheep and Dorper sheep are higher than those of Hulun Buir lambs.

Key words： lamb; fattening pattern; small intestine; pancreas; enzyme activity

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SUN Juan, YAN Sumei, ZHANG Ying, WU Tiemei, WANG Xinpeng, CHANG Chencheng, GUO Xiaoyu . Effects of Fattening Patterns on Enzyme Activities of Digestive Tract of Hulun Buir Lambs and F1 Hybrid Lambs of Hulun Buir and Dorper Sheep[J]. Chinese Journal of Animal Nutrition, 2015 , 27(5) : 1577 -1585 . DOI: 10.3969/j.issn.1006-267x.2015.05.030

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