Nutritive value, behaviour, and growth of Barbarine lambs fed on oldman saltbush (Atriplex nummularia L.) and supplemented or not with barley grains or spineless cactus (Opuntia ficus-indica f. inermis) pads

It was concluded that supplementation of free-browsing or stall-fed Barbarine lambs on atriplex with energy source is necessary. Both barley and cactus supply improved lamb performance.