不同锰元素含量日粮对犊牛生长性能和粪尿排泄指标的影响研究

Effects of different Manganese content diets on growth performance and fecal and urine excretion indexes of calves

中文关键词: 预混料  犊牛  锰元素

英文关键词: premix  Calf  Manganese elemen

中文摘要:

      日粮1%预混料减少120mg/kg锰元素时，30天犊牛累积生长显著高于对照组（P < 0.05），说明锰元素与犊牛的生长性能确有明显影响；但是日粮中不同的锰元素对于犊牛体尺指标均没有显著影响（P > 0.05），说明微量元素锰对于犊牛体尺性能影响不大。而且，研究发现日粮1%预混料减少60mg/kg、120mg/kg和240mg/kg锰元素均可以适当提高犊牛粪便氮磷的表观消化率，降低犊牛多种元素的排放，其中日粮1%预混料减少240mg/kg锰元素时的氮磷消化率最高，而且可以有效降低犊牛粪氮、粪铜和粪锌的排放量、30天的尿氮排放量，效果最好。

英文摘要:

      The cumulative growth of calves at 30 days was significantly higher than that in the control group (P < 0.05) when 1% premix supplemented with 120mg/kg manganese was reduced, indicating that manganese had significant effects on growth performance of calves. However, different dietary manganese had no significant effect on calf size index (P > 0.05), indicating that trace element manganese had little effect on calf size performance. In addition, it was found that 1% premixed diets with a reduction of 60mg/kg, 120mg/kg and 240mg/kg manganese can properly improve the apparent digestibility of nitrogen and phosphorus in feces and reduce the emission of various elements of calves, and the 1% premixed diets with a reduction of 240mg/kg manganese have the highest nitrogen and phosphorus digestibility. Moreover, it can effectively reduce the emission of fecal nitrogen, fecal copper and zinc, and the urine nitrogen emission of 30 days, with the best effect.