China Animal Husbandry and Veterinary Medicine ›› 2022, Vol. 49 ›› Issue (2): 521-528.doi: 10.16431/j.cnki.1671-7236.2022.02.013

• Nutrition and Feed • Previous Articles     Next Articles

Effects of Heat Stress on Blood Biochemical Indexes of Murrah and Nili-Ravi Buffaloes

LIU Xinyong1, TAN Zhengzhun2, LI Hui2, HUANG Jian2, LUO Hua2, ZENG Linghu2, CHENG Juanru2, ZHONG Huapei2, YANG Chunyan2, WANG Xiaoli1, QIN Guangsheng2   

  1. 1. College of Animal Science and Technology, Guangxi University, Nanning 530005, China;
    2. Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning 530001, China
  • Received:2021-07-05 Published:2022-01-27

Abstract: 【Objective】 The purpose of this study was to explore the changes of blood biochemical indexes of Murrah and Nili-Ravi buffaloes under heat stress.【Method】 11 Murrah and 11 Nili-Ravi buffaloes with similar physical conditions and healthy physique were selected.The experimental period was divided into heat stress period and non stress period, and four blood samples were taken in each experimental period, with an interval of one week.The blood samples were measured for biochemical indexes such as serum hormone concentration, antioxidant index and ion concentration.【Result】 For Murrah buffalos, the activity/content of superoxide dismutase (SOD), total cholesterol (CHOL), malondialdehyde (MDA), heat shock protein 70 (HSP70), potassium ion (K+), sodium ion (Na+) and chloride ion (Cl-) during heat stress were significantly higher than those in non stress period (P < 0.05), while the activity/content of alanine aminotransferase (ALT), aspartate aminotransferase (AST), insulin-like growth factor 1 (IGF-1), cortisol (CORT), leptin (LEP), glutathione peroxidase (GSH-Px), total antioxidant capacity (T-AOC) and calcium ion (Ca2+) were significantly lower than those in non stress period (P < 0.05).For Nili-Ravi buffaloes, the content/activity of albumin (ALB), CHOL and glutamyltransferase (GGT) in the heat stress period were significantly higher than those in the non stress period (P < 0.05), and the content of globulin (GLOB) in the heat stress period was significantly lower than that in the non stress period (P < 0.05).In heat stress period, the activity/content of ALT, total protein (TP), GLOB, CHOL, urea nitrogen (BUN) and triglyceride (TG) in Murrah buffaloes were significantly higher than those in Nili-Ravi buffaloes (P < 0.05), and the contents of ALB, tetraiodothyronine (T4) and K+ in Nili-Ravi buffaloes were significantly higher than those in Murrah buffaloes (P < 0.05).In non stress period, the contents of ALT, BUN, TG, glucose(GLU) and T-AOC of Murrah buffaloes were significantly higher than those of Nili-Ravi buffaloes (P < 0.05).【Conclusion】 Heat stress reduced the endocrine hormone level and antioxidant capacity of Murrah and Nili-Ravi Buffaloes, and affected the electrolyte balance of the body.The immune function of Nili-Ravi buffaloes also decreased to a certain extent.At the same time, Murrah buffaloes showed stronger ability to scavenge free radicals, and Nili-Ravi buffaloes showed better metabolism, thermoregulation and electrolyte compensation ability to deal with heat stress.

Key words: Murrah buffalo; Nili-Ravi buffalo; heat stress; biochemical indexes

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