Effects of milking system in suckling period on growth, reproduction traits, and milk yield of East Friesian-cross dairy sheep

Abstract

The main objective of this study was to determine the effects of milking system on growth, reproduction, and milk yield and composition of East Friesiancross (Tahirova) dairy sheep that were milked in the evening during the suckling period. A total of 43 Tahirova ewes and 58 lambs were used in the present study. One of the groups was milked in the evening (evening milked; EM) before coming together with their lambs, and the other group was not (not milked in the evening; NEM). Morning milking was performed in both groups during the study. Lambs in both groups were individually weaned at the age of 60 days. There was no statistical difference between the lambs' live weight at weaning in the EM and NEM groups, determined to be 23.46 and 24.11 kg, respectively. Live weight values of lambs were similar in the groups at ages of up to 180 days. The reproductive characteristics of ewe lambs in the EM and NEM groups, having similar growth rates and a similar live weight and body condition in the first estrus stages, were also similar. The return rate and frequency of return were close in both groups of ewe lambs. Milk yield of the NEM group was significantly higher than that of the EM group before and after weaning. However, in groups with similar lactation milk yield and length, the total marketable milk yield was higher in the suckling period of the EM group. The milking system in suckling period of Tahirova ewes does not significantly affect growth, average daily gain, and reproductive characteristics. Milk yield in the NEM group before and after weaning was significantly higher than the EM group, but the total marketable milk yield was higher in the EM group.

Udder morphology and milk yield of East Friesian sheep

“…In order to improve udder morphology and milkability, it is recommended to use linear udder traits in practice. The relationship of udder traits with milk yield in sheep has been investigated in many studies (Dzidic et al, 2004;Kominakis et al, 2009;Mioč et al, 2009;Prpic et al, 2013;Vrdoljak et al, 2020;Seker et al, 2022;Tolu and Yazgan, 2022;Marshall et al, 2023;Smith et al, 2023). Kaygisiz and Dag (2017) found generally positive and significant correlations between udder size and type of udder and milk yield.…”