The sward height could determine the intake of the herbivores and, at the same time, to affect to sward composition (Morris et al., 1994). If the foraging strategies is different among species could be also different among breeds of sheep (Milne, 1991).
The objective of this work is to know the effect of sward height and sheep breed (churra and merina) on sward composition under irrigated and continous grazing system.
The experiment was carried out according a factorial design 2x2x5, defined by:
2 sward height (SH): low (LSH:<3.5 cm) and high (HSH:>6.5 cm)
2 Spanish breed of sheep: Churra and Merina
5 sampling periods: 1 (29.07), 2 (20.07), 3 (24.08), 4 (21.09) and 5 (19.10)
The SH was recorded three times a week and they were adjusted using variable stocking rates with spares similar ewes. Available dry matter (kg/ha) was 318 and 943 for the low (3.7 cm) and high (6.5 cm) sward height, respectively.