Abstract

This study was carried out in an attempt to evaluate the impact of Broussonetia papyrifera as a roughage substitute at different levels on carcase traits, growth performance, meat quality and immune performance in Hu ram lambs. Sixty Hu rams (5 months of age, 26.70 ± 2.14 kg body weight) were randomly divided into four groups. The treatments comprised B. papyrifera supplementation at levels of 0% (G0), 30% (G30), 60% (G60) and 100% (G100) of roughage feed. The results suggested that diet supplemented with B. papyrifera (G100 group) caused a higher average weight gain (AWG) and average daily gain (ADG) than those of G0 group. The highest carcase weight was observed in the G60 group. The chemical and physical properties of the longissimus dorsi muscle of Hu rams showed no significant differences (p>.05). For fatty acid, the G60 group had significantly lower content of saturated fatty acids (SFAs), higher contents of monounsaturated fatty acids (MUFAs) and polyunsaturated fatty acids (PUFAs) and higher PUFA/SFA ratio than other groups (p<.05). In terms of the immune response, G60 and G100 groups significantly showed a significant rise in the immunoglobulins (IgG, IgA and IgM) (p<.05). This study indicated multiple beneficial effects of the inclusion of B. papyrifera (60% of the roughage feed) on the growth performance, carcase traits, meat quality and immune response in Hu rams. It could be used as a high-quality unconventional feedstuff for rams.

• HIGHLIGHTS

• The addition of Broussonetia papyrifera to the diet resulted in a significant improvement in the average weight gain (AWG) and average daily gain (ADG) of Hu rams.

• Adding appropriate proportion of B. papyrifera in diets positively modulates fatty acid percentage in the longissimus dorsi muscle, and also increases immunoglobulins (IgG, IgA and IgM) in blood.

• Broussonetia papyrifera could be used as a high-quality unconventional feedstuff for rams and has a positive effect on their growth performance, meat quality and immune performance.

摘要

进行这项研究的目的是评估不同水平的纸莎草作为粗饲料的替代品对Hu公羊羔的car体性状，生长性能，肉质和免疫性能的影响。将60只Hu公羊（5个月大，26.70±2.14 kg体重）随机分为四组。这些处理由构树为0％（G0），30％（G30），60％（G60）和粗饲料饲料的100％（G100）添加水平。结果表明，补充了毕赤酵母的饮食（G100组）比G0组的平均体重增加（AWG）和平均日增重（ADG）更高。在G60组中观察到最高的car体重量。背最长肌的化学和物理性质胡公羊的肌肉无明显差异（p > .05）。对于脂肪酸，G60组的饱和脂肪酸（SFA）含量明显低，单不饱和脂肪酸（MUFAs）和多不饱和脂肪酸（PUFAs）含量较高，PUFA / SFA比值更高（p <.05） 。在免疫应答方面，G60和G100组的免疫球蛋白（IgG，IgA和IgM）显着升高（p <.05）。这项研究表明，添加腐烂芽孢杆菌（占粗饲料的60％）对Hu公羊的生长性能，car体性状，肉质和免疫反应具有多种有益作用。它可以用作公羊的高质量非常规饲料。

• 强调

• 日粮中添加布鲁氏疏螺旋体使Hu公羊的平均体重增加（AWG）和平均日增重（ADG）显着提高。

• 在饮食中添加适当比例的纸状毕赤酵母可积极调节背最长肌的脂肪酸百分比，还可以增加血液中的免疫球蛋白（IgG，IgA和IgM）。

• 纸型布鲁氏菌可以用作公羊的优质非常规饲料，并且对它们的生长性能，肉质和免疫性能具有积极作用。