Journal of Animal and Veterinary Advances

Year: 2012
Volume: 11
Issue: 15
Page No. 2747 - 2752

Evaluation of Split Feeding Regimens on Growth and Productivity of Hair Sheep Ewes and Lambs in the Tropics

Authors : R.W. Godfrey, M.C. Vinson and R.C. Ketring

Abstract: Hair sheep ewes and lambs were used to evaluate the impact of feeding a split ration on productivity and growth. St., Croix White, Barbados Blackbelly and Barbados Blackbelly x St., Croix White lambs weaned at 63 days of age were group fed for 100 days beginning at 2 weeks after weaning. Treatments consisted of feeding concentrate (16% CP, 68% TDN) in the morning (am; n = 19), afternoon (pm; n = 19) or split between the morning and afternoon (am to pm); n = 18) at 4% of BW/(lambAday). In a second study lactating St. Croix White and Dorper x St., Croix White ewes grazing guinea grass pastures were assigned to treatments (n = 16/treatment) based on breed, age and number of lambs. Treatments consisted of individually feeding ewes 0.9 kg concentrate (16% CP, 68% TDN) in the morning (am) or afternoon (pm), 0.45 kg in the morning and afternoon (am to pm) or no feed (Control) beginning on day 7 (lambing = day 0). On day 21, 24 h milk production was measured. A sterile ram with a marking harness was used to detect estrus. The am and pm lambs gained less (p<0.02) than the am to pm lambs (10.3±0.8 ks. 10.2±0.8 vs. 12.1±0.8 kg, respectively). The am to pm lambs had higher (p<0.0004) ADG than either the am or pm lambs (138.1±13.1 vs. 110.4±12.9 vs. 111.5±13.1 g day-1, respectively). The am to pm ewes consumed a higher (p<0.0001) percentage of their feed than am or pm ewes (98.4±1.9 Vs. 91.5±1.9 Vs. 92.9±1.9 %, respectively). Post-partum interval to estrus was shorter (p<0.02) in am to pm ewes than in pm ewes (39.6±3.9 vs. 42.9±1.3 vs. 44.2±3.9 day, respectively). Milk production and litter weaning weight were not different among treatments (p>0.10). Weight loss by control ewes was greater (p<0.002) than the am, pm or am to pm ewes (4.4±1.4 vs. 0.9±1.4 vs. 1.2±1.4 vs. 0.06±1.4 kg, respectively). Lambing rate at the subsequent lambing period was not different among treatments (p>0.10). A split feeding regimen increased feed consumption and decreased post-partum weight loss but did not increase litter weaning weight or milk production of hair sheep ewes. It does not appear beneficial to feed hair sheep ewes during the post-partum period using either a once a day or a split feeding regimen. A split feeding regimen increased weight gain and ADG of weaned hair sheep lambs and it may be an option to utilize this management practice to increase gain if the economics of the added labor for twice a day feeding are feasible.

How to cite this article:

R.W. Godfrey, M.C. Vinson and R.C. Ketring, 2012. Evaluation of Split Feeding Regimens on Growth and Productivity of Hair Sheep Ewes and Lambs in the Tropics. Journal of Animal and Veterinary Advances, 11: 2747-2752.

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