不同精料水平对新疆驴利用稻草日粮的影响

Effect of Different Concentrate Level on the Xinjiang Donkey Utilizing Rice Straw Diet

本实验选用3头雄性健康新疆驴为实验动物，体重132±10Kg，3～4周岁，采用全收粪消化实验方法，分三期进行，研究在3种精料水平（0g／d、400g／d、800g／d）下新疆驴对稻草日粮的利用率。实验结果表明：400g精料组的干物质采食量为3813±284g／d，较0g精料组的3015±265g／d有显著提高（P〈0．01），较800g精料组3490±238g／d有显著提高（P〈0．05），干物质消化率随着精料水平的增加有增加趋势（P〉0．05）。400g和800g精料组的粗蛋白采食量、消化率分别为281±50g／d、53．5±5．7％和357±55g／d、59．2±2．2％，都分别显著高于0g精料组的149±42g／d采食量和36．3士3．8％的消化率（P〈0．01）。400g精料组NDF和ADF的采食量都较其它两组有所提高（P〈O．05），而三组间的消化率无明显差异（P〉0．05）。800g料组磷的采食量、消化率和能量的消化率分别为8．1±2．8g／d、30．8±4．8％和53．5±3．5％，分别较0g精料组有显著提高（P〈O．05），与400g精料组间无明显差异（P〉0．05）。新疆驴在日喂400g精料下能够较好的利用稻草日粮。

Three male health donkeies from xinjiang was chosed as laboratory animals in the experiments,and the weight and age are 132 ± 10 kg, 3--4 years, separately. The method of total collect feces was used to study the Xinjiang donkey＇s utilization of rice straw diet at three concentrate levels （0 g/d, 400 g/d, 800 g/d], and all digestion experiments were divided into four phases . The results showed that DM which intakes 400 g on concentrate group was 3813 ±284g/d, and it significantly improved weight comparison with concentrate group with 0 g {3015±265 g/d, P〈0. 011 and 800 g concentrate group {3490 ±238g/d, P（0.05}, and DM＇s digestibility had increasing trend （P〉0.05） with the concentrate level increased. 400g and 800 g concentrate groupsCP intake and digestibility were 281±50 g/d, 53.5±5.7% and 357±55g/d, 59.2±2.2%, were significantly higher than the 0 g concentrate group＇s 149 ±42g/d and 36.3±3.8% （p〈0.01}, respectively. The two groups＇intake, 400g concentrate group＇s NDF and ADF, were higher than other two groups （P〈0.05）, and had no significantly difference in digestibility among three groups （P〈0. 05）. The 800g concentrate group＇s phosphorus intake, digestibility and energy digestibility were 8 . 1±2.8g/d, 30.8-±4.8% and 53.5±3.5%, all significantly improved comparison with 0g concentrate group, respectively （P〈0.01）. It had no difference comparison with 0 g concentrate group（ P〈0.05 ）. Xinjiang donkey could utilize the rice straw as the diet well under supplied 400g/d concentrate level.