China Animal Husbandry and Veterinary Medicine ›› 2021, Vol. 48 ›› Issue (1): 109-116.doi: 10.16431/j.cnki.1671-7236.2021.01.012

• Physiology and Biochemistry • Previous Articles     Next Articles

Comparative Study on Physiological,Serum Biochemical Indexes and Immune Performance of Dorper Sheep,Suffolk Sheep and Mongolian Sheep Under Low Temperature Environment

LI Pengxing1, LI Qing1, CHEN Dayong2, HE Huijie2, JI Xiang1, GAO Dong1, GAO Aiqin1   

  1. 1. School of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China;
    2. Inner Mongolia Sainuo Grassland Sheep Industry Co., Ltd., Wulanchabu 011800, China
  • Revised:2020-09-04 Online:2021-01-20 Published:2021-01-15

Abstract: The goal of this study was to elucidate the impact of low environment temperature on the performance of Dorper sheep and Suffolk sheep,and to further reveal the internal mechanism,provide for hybridization using data reference in Inner Mongolia.Twenty 12-month-old healthy Dorper sheep,Suffolk sheep and Mongolian sheep with similar body weight (half male and half female) were selected,and the latter was used as control.The physiological and serum biochemical indicators,and immune performance were measured and compared.The results showed that the body temperature,respiratory rate and heart rate in a whole day were not significantly different between Dorper and Suffolk sheep (P>0.05),but their heart rates were lower than the Mongolian sheep (P<0.05).The body temperature of Dorper sheep was significantly lower than Mongolian sheep in the morning (P<0.05),and the respiratory rate was significantly higher than Mongolian sheep all day (P<0.05).Compared with Mongolian sheep,the activities of serum alanine aminotransferase (ALT),superoxide dismutase (SOD) and the levels of triiodothyronine (T3) and thyroxine (T4) in Dorper sheep and Suffolk sheep had no significant difference (P>0.05),while aspartate aminotransferase (AST) and alkaline phosphatase (AKP) activities were significantly higher (P<0.05).The activity of lactate dehydrogenase (LDH) in Suffolk sheep was significantly higher than Duper sheep and Mongolian sheep (P<0.05).The levels of interleukin 2 (IL-2),interleukin 4 (IL-4),immunoglobulin A (IgA),immunoglobulin M (IgM) and immunoglobulin G (IgG)in Dorper sheep and Suffolk sheep serum were not significantly different compared with Mongolian sheep (P>0.05),but the concentration of serum IL-2 in Dorper sheep was significantly higher than Suffolk sheep (P<0.05).In conclusion,under the low environment temperature in Inner Mongoliar,the heart rate of both Dorper sheep and Suffolk sheep throughout the day were significantly lower than Mongolian sheep,and the activities of ALT and AKP in serum were significantly higher than Mongolian sheep.The serum LDH content of Dorper sheep was significantly lower than Suffolk sheep,and the content of IL-2 was significantly higher than Suffolk sheep.Except for AST,the other serum biochemical indicators in experimental sheep were within the normal range.It showed that in the low temperature environment of Inner Mongolia,Dorper sheep and Suffolk sheep could maintain normal physiological conditions and were better adapted to the environmental climate in Inner Mongolia.

Key words: low temperature environment; Dorper sheep; Suffolk sheep; physiological and biochemical indicators; immune performance

CLC Number: