盐碱化草地栽培披碱草对绵羊消化代谢的影响

he objective was to evaluate effects of Elymus dahuricus cultivated in light, moderate and serious alkali-saline grassland on nutrient digestion and metabolism in sheep. Eight health sheep（37.03±2.11 kg）were arranged into a 4 × 4 replicated Latin square design and supplemented with TMR. Sheep in control group were fed with TMR consist of concentrate (50%) and corn stover (50%), while sheep in treatment one, two and three were fed TMR consist of concentrate (50%) and Elymus dahuricus (50%) respectively cultivated in light, moderate and serious alkali-saline grassland. Every sheep were fed 1400g TMR separately each day. The results showed that the apparent digestibilities of DM and OM in all treatments were significantly lower than that in control group (P<0.05). The DE of all treatments were significantly lower than that of control group (P<0.05). The GE, intake nitrogen, digestible nitrogen and retenion nitrogen of treatment three were significantly lower than those of control group (P<0.05).The results indicated that the nutrient digestion and metabolism was affected negatively in sheep fed with Elymus dahuricus cultivated in different kinds of alkali-saline grassland, and the Elymus dahuricus cultivated in serious alkali-saline grassland had the most negatively effect on the nutrient digestion and metabolism in sheep.