期刊
REPRODUCTION NUTRITION DEVELOPMENT
卷 46, 期 1, 页码 19-29出版社
EDP SCIENCES S A
DOI: 10.1051/rnd:2005058
关键词
linolenic acid; milk and plasma fatty acids; follicle growth; dairy cows
The objective of this study was to determine the effect of a linseed supplement on follicle growth, progesterone concentrations and milk and plasma fatty acids in dairy cows post partum. Sixteen Holstein cows were given a basal total mixed diet plus one of two supplements: control ( C; extruded soybeans; n = 8) or linseed ( L; extruded linseeds; n = 8). One month after calving oestrous cycles were synchronised ( PRID(R)). Follicle growth and milk progesterone concentrations were measured every 2 d over the induced oestrous cycle. Milk production characteristics were unaffected by treatment. The L cows lost significantly more BCS than the C cows ( P < 0.01). Plasma insulin, glucose and urea were unaffected by the treatment. Plasma NEFA tended to be affected by the treatment ( L > C, P = 0.08). The proportions of 18: 3n- 3 in milk and plasma were increased by L compared to C ( P < 0.001 and P < 0.01, respectively). There was an effect of dietary supplement on the numbers of small follicles ( L < C, P < 0.05). Milk progesterone was unaffected by treatment. In conclusion, the increased supply of 18: 3n- 3 to the cows had only a modest effect on follicle populations and corpus luteum activity was unchanged.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据