日粮铜钼水平对辽宁绒山羊营养物质消化代谢的影响

试验研究日粮铜(Cu)钼(Mo)添加水平对辽宁绒山羊营养物质消化代谢的影响.选用18月龄体重相近、安装永久性瘤胃瘘管的辽宁绒山羊羯羊12只,采用完全随机分组试验设计,分为4组,每组3只.试验分为Mo0期和Mo5期:Mo0期日粮为基础日粮中不加Mo,Mo5期日粮在基础日粮上加Mo(DM)5 mg/kg;每期设4个Cu水平,在基础日粮中添加的Cu(DM)分别为0、19、28和38 mg/kg.结果表明:1)日粮中添加Cu显著提高了辽宁绒山羊的干物质消化率、ADF和NDF的表观消化率,显著降低了干物质采食量和Cu的表观消化率(P<0.05).2)日粮中添加Mo能显著提高ADF、NDF及Cu的表观消化率,但显著降低了氮的表观消化率(P<0.05).3)Cu与Mo互作对干物质消化率、ADF和NDF的表观消化率影响差异显著(P<0.05).在辽宁绒山羊绒毛快速生长期,日粮中添加Mo(DM)5 mg/kg,Cu(DM)19 mg/kg营养物质消化效果最佳.

Influence of copper and molybdenum supplementation on nutrientdigestion and metabolism in Liaoning cashmere goats

This research was conducted to study the influence of adding copper and molybdenum either singly or in combination in diets on nutrient digestion and metabolism in Liaoning cashmere goats during the cashmere growing period.Twelve castrated Liaoning cashmere goats (1.5-year-old) ruminally fistulated were randomly and averagely assigned into four groups and each group has three goats.The trial were assigned into two period,fed a basal diet that was supplemented with either 0 or Mo (DM) 5 mg/kg and each period has four differents copper level (Cu:0,19,28 and 38 mg/kg,DM) diets.The results indicated that:1) Supplemental different copper level in the basal diet significantly increased dry matter digestibility,ADF and NDF digestibility,but significantly decreased dry matter intake and copper digestibility (P<0.05).2) Supplemental Molybdenum significantly increased ADF,NDF and copper digestibility,but significantly decreased nitrogen metabolism (P<0.05) .3) Collaborative effect of copper and molybdenum on dry matter,ADF,NDF and copper digestibility was significantly changed (P<0.05).The results suggested that the optimal copper and molybdenum of cashmere goats during the cashmere growing period were Mo (DM) 5 mg/kg and Cu (DM) 19 mg/kg in daily diet.