Burgos-González Carlos, Huerta-Aparicio Maricela, Aguirre Virginio, Vázquez Reyes, Orihuela Agustín, Pedernera Mariana
Facultad de Ciencias Agropecuarias, Universidad Autónoma del Estado de Morelos, Avenida Universidad No. 1001, Colonia Chamilpa, 62209, Cuernavaca, Morelos, Mexico.
Trop Anim Health Prod. 2018 Mar;50(3):683-687. doi: 10.1007/s11250-017-1448-8. Epub 2017 Oct 27.
The aim of the present study was to characterize milk production and preweaning development of lambs from Katahdin and Saint Croix sheep. Milk production was measured weekly, from birth to 8 weeks using oxytocin technique, in 12 Katahdin (62.0 ± 5.0 kg) and 11 Saint Croix (46.2 ± 4.83 kg) multiparous ewes. The mean daily milk production for the Katahdin ewes was 1.38 ± 0.54 L/day and for the Saint Croix ewes it was 1.26 ± 0.49 L/day (P > 0.05) (mean ± SE for each group). However, more colostrum was produced immediately after parturition by the Katahdin than Saint Croix ewes (P < 0.001). The lamb's weight and weight gain were recorded weekly. The birth weight of lambs from both breeds was similar but at weaning, the Katahdin lambs were heavier (16.46 ± 0.58 kg) than the Saint Croix lambs (12.90 ± 0.59 kg) (P < 0.001). Furthermore, a significant positive correlation was found between daily milk yield and daily gain weight in both breeds, but with a greater slope in Katahdin lambs in comparison with Saint Croix lambs. It was concluded that Saint Croix and Katahdin hair sheep breeds produced similar amounts of milk during lactation, but the latter produced heavier lambs at weaning.
本研究的目的是描述卡他丁羊和圣克罗伊羊羔羊的产奶量及断奶前发育情况。在12只卡他丁多胎母羊（62.0±5.0千克）和11只圣克罗伊多胎母羊（46.2±4.83千克）中，采用催产素技术从出生到8周每周测量一次产奶量。卡他丁母羊的平均日产奶量为1.38±0.54升/天，圣克罗伊母羊为1.26±0.49升/天（P>0.05）（每组均值±标准误）。然而，卡他丁母羊产后立即分泌的初乳比圣克罗伊母羊多（P<0.001）。每周记录羔羊的体重和体重增加情况。两个品种羔羊的出生体重相似，但断奶时，卡他丁羔羊（16.46±0.58千克）比圣克罗伊羔羊（12.90±0.59千克）重（P<0.001）。此外，两个品种的日产奶量与日增重之间均存在显著正相关，但与圣克罗伊羔羊相比，卡他丁羔羊的斜率更大。研究得出结论，圣克罗伊羊和卡他丁毛用绵羊品种在泌乳期产奶量相似，但后者断奶时的羔羊体重更重。
