Comparison of cold adaptability and immune function of different growth stages of F1 Friesian-Holstein cattle and Holstein cattle
The experiment aimed to investigate the cold adaptability and immune function of F1 Friesian-Holstein cattle and Holstein cattle at different growth stages.The trial employed a breed grouping design,selecting 30 F1 Friesian-Holstein cattle and 30 Holstein cattle.The cold stress test was conducted from January 20th to February 20th,with a trial period of seven days.The results showed that under cold stress conditions,F1 Friesian-Holstein cattle had significantly higher levels of interleukin-2(IL-2)during mid-lactation compared to Holstein cattle(P<0.05),significantly higher levels of interleukin-3(IL-3)during the calf,heifer,and young and dry periods compared to Holstein cattle(P<0.05),significantly lower levels of interleukin-6(IL-6)during the heifer and lactation periods compared to Holstein cattle(P<0.05),and significantly higher levels of interleukin-10(IL-10)during the heifer period compared to Holstein cattle(P<0.05).The complement C3 content in F1 Friesian-Holstein cattle was significantly higher than in Holstein cattle at all stages(P<0.05),the complement C4 content was significantly higher during the heifer,young,and dry periods compared to Holstein cattle(P<0.05),and the immunoglobulin G(IgG)level was significantly higher during the calf period compared to Holstein cattle(P<0.05).The study indicates that under cold stress conditions,F1 Friesian-Holstein cattle have stronger immune performance and cold resistance compared to Holstein cattle,and are more adapted to cold environments.
F1 Friesian-Holstein cattleHolistan cattlecold stressimmune function
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