绵羊血清25-羟基维生素D浓度的季节性变化

Seasonal variation in serum 25-hydroxyvitamin D concentrations in sheep.

作者信息

Smith B S, Wright H

出版信息

Vet Rec. 1981 Aug 15;109(7):139-41. doi: 10.1136/vr.109.7.139.

DOI:10.1136/vr.109.7.139

Abstract

Seasonal changes in serum 25-hydroxyvitamin D were followed in pregnant and non-pregnant sheep kept indoors or at pasture. In housed sheep circulating levels depended on starting value, dietary intake and requirements. thus, in wethers given hay values declined steadily; in non-pregnant ewes on the standard diet values were constant; and in pregnant ewes given hay and nuts values were minimal at lambing. In sheep at pasture seasonal changes were aggravated by those changes due to pregnancy so that the lowest values were always observed at or near parturition.

摘要

对室内饲养或牧场饲养的怀孕和未怀孕绵羊的血清25-羟基维生素D的季节性变化进行了跟踪研究。在圈养绵羊中，循环水平取决于起始值、饮食摄入量和需求。因此，给阉羊喂干草时，其水平稳步下降；给非怀孕母羊喂标准日粮时，水平保持恒定；给怀孕母羊喂干草和坚果时，产羔时水平最低。在牧场饲养的绵羊中，季节性变化因怀孕引起的变化而加剧，因此最低值总是在分娩时或分娩前后观察到。