EFFECT OF CALF HOUSING ON PLASMA ASCORBATE AND ENDOCRINE AND IMMUNE FUNCTION
EFFECT OF CALF HOUSING ON PLASMA ASCORBATE AND ENDOCRINE AND IMMUNE FUNCTION
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DOI：
10.3168/jds.s0022-0302(91)78320-3
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发表时间：
1991-05-01
影响因子：
3.5
通讯作者：
BRUNNER, CJ
中科院分区：
文献类型：
--
作者：
CUMMINS, KA;BRUNNER, CJ
The effect of housing calves in indoor metal pens (1.2 m x 1.2 m) or commercial calf hutches was determined on plasma concentration of cortisol, antibodies, and ascorbate. Six calves per treatment were deprived of colostrum, assigned randomly to treatment, and fed a commercial milk replacer until 56 d of age. Calves housed in hutches had higher plasma IgG concentrations than calves in pens at 42 and 56 d of age. Housing had no effect on plasma IgM concentration. Antibody titers to keyhole limpet hemocyanin injected at 14 and 28 d of age were higher in hutch-housed calves from 21 to 56 d of age. Calves housed in hutches also had lower plasma cortisol concentrations, although cortisol decreased with age in both treatment groups. Plasma ascorbate and ascorbate plus dehydroascorbate were higher in hutch-housed calves. Regression analysis indicated a positive relationship between plasma ascorbate and IgG in metal pen-housed calves and a negative relationship in hutch-housed calves. Housing in 1.2 m x 1.2 m metal pens decreases cortisol, plasma ascorbate, IgG, and specific antibody titers in dairy calves relative to calves housed in hutches.
