Effects of shearing and supplemental level on intake of dry ewes grazing on barley stubble.
Twenty-eight Comisana dry ewes were utilised to evaluate the effect of shearing (14 shorn and 14 unshorn ewes) and supplemental level (100 and 300g of concentrate) on intake of barley stubble. Shorn ewes showed a small increase in dry matter intake (at the end of August: 1.32 vs. 1.10kg/day; p<0.01). Intake of barley stubble decreased as supplement level increased (mean: 1.18 vs. 1.29; p<0.01). On average, substitution effect was 0.63. Total lamb weight per ewe was greater in the group receiving 300g of concentrate (7.38 vs. 5.85; p<0.05). Shearing induced a small, but not significant decrease in total lamb weight per ewe (6.18 vs. 7.05kg/ewe). Results seem to indicate that unshorn ewes react better to environmental stress and that 300g improve reproductive performance.
Avondo
M
Istituto di Scienze e Tecnologie delle Produzioni Animali, Università di Catania. Via Valdisavoia, 5-95123, Catania, Italy
Bordonaro
S
Marletta
D
Guastella
AM
D'Urso
G