饲养管理技术对甘南藏羔羊育肥屠宰性能的影响
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摘要
甘南藏羊在妊娠期、哺乳期进行补饲,所产羔羊进行综合饲养管理,12月龄时与自然放牧的成年藏羊共同全舍饲育肥90 d,分析主要屠宰性状和内脏器官指标变化。结果表明:虽然宰前活重、胴体重成年藏羊高于12月龄组(P<0.05),但净肉重、屠宰率2组间差异不显著(P>0.05);在胴体体尺指标中,胴体长、胴体深、胴体胸深指标成年藏羊高于12月龄藏羊,2组间差异显著(P<0.05);而胴体后腿围、大腿肉厚、腰部肉厚、肋部肉厚12月龄藏羊高于成年藏羊,2组差异显著(P<0.05)。在内脏器官测定中,皮重、血重、花油重、胃重、肝重、脾重成年藏羊高于12月龄藏羊,2组间差异显著(P<0.05)。头重、蹄重、肺重、肾重、心重2组间无显著差异(P>0.05)。因此,从保护草原环境,加快羊群周转,提高羊产出效益等因素考虑,甘南藏羊以12月龄育肥出栏较理想。
The Gannan Tibetan ewes were given supplementary feeding during pregnancy and lactation, its lambs were raised and managed comprehensively, and the lambs at the age of 12 months were fed and fattened together with natural grazing adult Tibetan sheep for 90 days, then to carry out slaughter test to observe and analysis main slaughter traits and internal organs indicators. The results showed that although the body weight before slaughter and carcass weight of adult Tibetan sheep were higher than those of 12-month-old group(P<0.05), there was no significant difference between the two groups in net meat weight and slaughter rate(P >0.05). In the carcass scale index,the carcass length, carcass depth and carcass chest depth of adult Tibetan sheep were higher than those of 12-month-old Tibetan lamb,the difference between the two groups was significant(P<0.05). The carcass hind leg circumference, thigh meat thickness, waist meat thickness and rib meat thickness of 12 months old Tibetan lamb were higher than those of adult Tibetan sheep, the difference between the two groups was significant(P<0.05).In the determination of visceral organs, the skin weight, blood weight, flower oil weight, stomach weight, liver weight and spleen weight of adult Tibetan sheep were higher than those of 12-month-old Tibetan lamb, the difference between the two groups was significant(P<0.05). There was no significant difference in head weight, hoof weight, lung weight, kidney weight and heart weight between the 2 groups(P>0.05).Therefore, considering the factors of protecting grassland environment, speeding up sheep turnover and improving sheep output efficiency, it is ideal for Gannan Tibetan young sheep to fatten up at 12 months old and then slaughter.
The Gannan Tibetan ewes were given supplementary feeding during pregnancy and lactation, its lambs were raised and managed comprehensively, and the lambs at the age of 12 months were fed and fattened together with natural grazing adult Tibetan sheep for 90 days, then to carry out slaughter test to observe and analysis main slaughter traits and internal organs indicators. The results showed that although the body weight before slaughter and carcass weight of adult Tibetan sheep were higher than those of 12-month-old group(P<0.05), there was no significant difference between the two groups in net meat weight and slaughter rate(P >0.05). In the carcass scale index,the carcass length, carcass depth and carcass chest depth of adult Tibetan sheep were higher than those of 12-month-old Tibetan lamb,the difference between the two groups was significant(P<0.05). The carcass hind leg circumference, thigh meat thickness, waist meat thickness and rib meat thickness of 12 months old Tibetan lamb were higher than those of adult Tibetan sheep, the difference between the two groups was significant(P<0.05).In the determination of visceral organs, the skin weight, blood weight, flower oil weight, stomach weight, liver weight and spleen weight of adult Tibetan sheep were higher than those of 12-month-old Tibetan lamb, the difference between the two groups was significant(P<0.05). There was no significant difference in head weight, hoof weight, lung weight, kidney weight and heart weight between the 2 groups(P>0.05).Therefore, considering the factors of protecting grassland environment, speeding up sheep turnover and improving sheep output efficiency, it is ideal for Gannan Tibetan young sheep to fatten up at 12 months old and then slaughter.
引文
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[2] 王欣荣,张利平,李文文.成年草地型藏羊屠宰性能及肉品质对比试验[J].畜牧与兽医,2011,43(8):102-103.
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[4] 刘秀,方素栎,王继卿,等.甘南欧拉型藏绵羊屠宰性能分析[J].畜牧与兽医,2012,44(7):46-49.
[5] 郭万春.青海黑裘皮型藏羊屠宰试验[J].畜牧与兽医,2015,47(5):159-160.
[2] 王欣荣,张利平,李文文.成年草地型藏羊屠宰性能及肉品质对比试验[J].畜牧与兽医,2011,43(8):102-103.
[3] 赵有璋.现代中国养羊[M].北京:金盾出版社,2005:138-721.
[4] 刘秀,方素栎,王继卿,等.甘南欧拉型藏绵羊屠宰性能分析[J].畜牧与兽医,2012,44(7):46-49.
[5] 郭万春.青海黑裘皮型藏羊屠宰试验[J].畜牧与兽医,2015,47(5):159-160.