| 摘要: |
| [目的]探索舍饲辽宁绒山羊的饲养标准.[方法]采用单因子试验方法,将30只体质量相近、健康的2周岁辽宁绒山羊母羊,随机均分为5组,研究日粮不同蛋白水平(92.6,100.6,110.2,121.2,131.9 g/kg)对其生产性能及营养物质消化率的影响.[结果]日粮不同蛋白水平对辽宁绒山羊体增质量和产绒性能(绒毛生长量、绒毛生长率、产绒量、羊绒长度、羊绒细度、绒层厚度)无显著影响(P>0.05),日粮中粗蛋白水平达到110.2 g/kg以上时,显著促进粗毛的生长(P<0.05);粗蛋白表观消化率随日粮中蛋白水平的增加而增加,二者呈极显著正相关(P<0.01);日粮中粗蛋白水平为110.2 g/kg以上时,能量表观消化率下降明显,与蛋白水平呈极显著负相关(P<0.01);粗纤维表观消化率与日粮中蛋白水平相关不最著(P>0.05).[结论]辽宁绒山羊日粮中适宜的蛋白水平为110.2g/kg. |
| 关键词: 日粮蛋白水平 辽宁绒山羊 生产性能 营养物质 消化率 |
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| 基金项目:辽宁省科技厅自然科学摹金项目 |
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| Effects of different protein levels on production performance and nutrient digestibility in Liaoning cashmere goats |
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| Abstract: |
| 【Objective】 The study investigated the breeding standardization of Liaoning cashmere goats.【Method】 By the means of one factor experiment,30 2-year-old and healthy female goats with similar body weight were arranged into 5 groups to study the effects of different dietary protein levels（92.6，100.6，110.2，121.2，131.9 g/kg） on production performance and nutrient digestibility in Liaonin cashmere goats.【Result】 The results showed that different dietary protein levels had no significant （P>0.05）effect on live body gain and yield and qualities of cashmere（cashmere growth length,cashmere growth rate,cashmere yeild,cashmere length,cashmere diameter,cashmere high）.There was significant (P<0.05) decrease on guard hair growth when the protein level was above 110.2 g/kg;A significant(P<0.01) positive correlation was found between dietary protein level and crude protein apparent digestibility,there was a significant (P<0.01) negative correlation between dietary protein level and energy apparent digestibility,and there was no significant correlation（P>0.05）between dietary protein level and crude fiber apparent digestibility.When the protein level was above 110.2 g/kg,energy apparent digestibility declined significantly.【Conclusion】 The dietary protein level of 110.2 g/kg is suitable for Liaoning cashmere goats. |
| Key words: dietary protein level Liaoning cashmere goat production performance nutrient digestibility |
