The role of different dietary Zn sources in modulating heat stress-related effects on some thermoregulatory parameters of New Zealand white rabbit bucks

The present work was conducted to assess the effect of diets supplementation to heat-stressed buck rabbits with different zinc (Zn) sources on the thermoregulatory and hematobiochemical parameters, and antioxidant status. A total of 24 mature buck rabbits (32-36 weeks of age) were randomly distribut...

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Published in:Animal biotechnology 2023-11, Vol.34 (4), p.1273-1282
Main Authors: El-Kholy, Mohamed S., El-Mekkawy, Mohamed M., Madkour, Mahmoud, Abd El-Azeem, Nafisa, Di Cerbo, Alessandro, Mohamed, Laila A., Alagawany, Mahmoud, Selim, Dina A.
Format: Article
Language:English
Subjects:
Alanine
Alanine transaminase
Antioxidants
Diet
Dietary supplements
Heat stress
Heat tolerance
Parameters
rabbit bucks
Rabbits
Sulfates
Temperature effects
Testosterone
thermoregulatory and hematobiochemical parameters
Urea
Ureas
Zinc
Zn sources
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Summary:The present work was conducted to assess the effect of diets supplementation to heat-stressed buck rabbits with different zinc (Zn) sources on the thermoregulatory and hematobiochemical parameters, and antioxidant status. A total of 24 mature buck rabbits (32-36 weeks of age) were randomly distributed into four groups (6 each). Group 1, non-heat-stressed control (NHSC), was reared in the absence of heat stress (HS) conditions and received the basal diet only. The other three groups (groups 2, 3 and 4) were kept in HS conditions. Group 2, heat-stressed control (HSC), received the basal diet only. The diet supplemented with 75 mg Zn/kg diet either in the inorganic form (Zn sulfate) or in the organic form (Zn picolinate) for groups 3 and 4, respectively. Zn supplementation to rabbits' diets lowered the heat stress-related increase of serum urea, alanine transaminase and malondialdehyde (MDA) concentration. These supplementations also increased the concentration of testosterone under HS conditions. Zn picolinate was more effective than Zn sulfate in restoring serum concentrations of urea, testosterone, and MDA. In conclusion, Zn addition to rabbits' diets from different sources, especially Zn picolinate, exhibits an ameliorative effect against the harmful impact of HS on hematobiochemical parameters and antioxidant status.
ISSN:1049-5398
1532-2378
DOI:10.1080/10495398.2021.2019757