Milk yield of Rahmani, Ossimi and Barki local ewes

Abou Naga, A.M.; El Shobokshy, A.S.; Marie, I.F.; Moustafa, M.A.

Alexandria Journal of Agricultural Research 29(2): 480-493

1981


ISSN/ISBN: 0044-7250
Accession: 001409994

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Abstract
68 Rahmani, 67 Ossimi [Ausimi] and 72 Barki ewes were studied for a 12-wk lactation period after lambing in spring, summer or autumn. For 6 wk before parturition and during lactation, the ewes were fed a low or high level of nutrition, the higher level supplying 25% more feed than the low level. Ossimi ewes had a significantly greater milk yield during wk 0-8 of lactation than Barki ewes (least-squares (LS) constants 1.95+or-0.69 and -1.80+or-0.68 kg); the yield for Rahmani ewes was intermediate (-0.15+or-0.69 kg). Rahmani and Ossimi ewes had a significantly greater milk yield during the 12-wk lactation than Barki ewes (LS constants 1.81+or-0.80 and 2.17+or-0.81 kg vs. -3.98+or-0.79). Ewes fed the high level of nutrition had significantly greater milk yields during wk 0-4, 0-8 and 0-12 of lactation (LS constants 1.15+or-0.28, 2.43+or-0.49 and 2.91+or-0.57 kg resp.) than ewes fed the low level of nutrition (-1.15+or-0.28, -2.43+or-0.49 and -2.91+or-0.57 kg). Ewes lambing in spring had significantly greater milk yields during wk 0-4 and 0-8 of lactation (LS constants 1.50+or-0.39 and 1.97+or-0.69 kg resp.) than ewes lambing in summer (-0.19+or-0.41 and -0.98+or-0.70 kg) and autumn (-1.31+or-0.41 and -0.99+or-0.71 kg). Age of ewe had no significant effect on milk yield. There was a significant breed x season interaction for milk yield from wk 0 to 8 of lactation.