Zarrin Mousa, Sanginabadi Meysam, Nouri Mahrokh, Ahmadpour Amir, Hernández-Castellano Lorenzo E
Department of Animal Science, Faculty of Agriculture, Yasouj University, Student Street, Yasouj 75918-74831, Iran.
Animal Production and Biotechnology Group, Institute of Animal Health and Food Safety, Universidad de Las Palmas de Gran Canaria, 35413 Arucas, Spain.
Animals (Basel). 2021 Apr 27;11(5):1258. doi: 10.3390/ani11051258.
This study aimed to investigate the effect of prepartum and postpartum feed restriction on body weight (BW), blood metabolites, and hormones as well as colostrum and milk yields and compositions in fat-tailed dairy sheep. In this study, 20 multiparous and pregnant ewes were randomly allocated to either the control (Ctrl; = 10) or the feed-restricted (FR; = 10) groups from week -5 to week 5 relative to parturition. Despite dry matter intake being decreased in the FR group compared to the Ctrl throughout both prepartum and postpartum periods, no differences in BW were detected between groups in any of the studied periods. Feed restriction increased both free fatty acids and beta-hydroxybutyrate concentrations during both prepartum and postpartum periods. Similarly, feed restriction increased triglyceride concentration postpartum. Additionally, feed restriction increased insulin and growth hormone and decreased prolactin concentrations during both prepartum and postpartum periods. Feed restriction caused a decreased colostrum yield and a relative increase of the main colostrum components in the FR group. Similarly, milk yield decreased in the FR group compared to the Ctrl group, although milk components were not affected. In conclusion, feed restriction did not affect BW but decreased colostrum and milk yield in fat-tailed dairy sheep.
本研究旨在调查产前和产后限饲对肥尾奶羊体重（BW）、血液代谢物、激素以及初乳和乳汁产量及成分的影响。在本研究中，20只经产怀孕母羊在分娩前第5周到产后第5周被随机分为对照组（Ctrl；n = 10）或限饲组（FR；n = 10）。尽管在整个产前和产后期间，FR组的干物质摄入量均低于Ctrl组，但在任何研究期间，两组之间的体重均未检测到差异。限饲在产前和产后期间均增加了游离脂肪酸和β-羟基丁酸酯的浓度。同样，限饲在产后增加了甘油三酯浓度。此外，限饲在产前和产后期间均增加了胰岛素和生长激素浓度，并降低了催乳素浓度。限饲导致FR组初乳产量下降，初乳主要成分相对增加。同样，与Ctrl组相比，FR组的产奶量下降，尽管乳汁成分未受影响。总之，限饲不影响肥尾奶羊的体重，但会降低其初乳和产奶量。
