摘要
为了解自然放牧乌珠穆沁羊的不同月龄和不同部位骨骼肌的营养成分,选取1、3、6、9、12月龄和18月龄的乌珠穆沁羊,测定其股二头肌、背最长肌、肱三头肌部位的水分、粗蛋白、脂肪和灰分含量。结果表明:随着月龄的增加,水分和灰分含量呈显著性下降趋势(P<0.05);粗蛋白含量在3月龄时较低,其他月龄间无明显差异;脂肪含量9月龄和18月龄时较高,3月龄和12月龄时较低。可以看出脂肪含量随着月龄及季节环境的改变其含量也随着变化,其他水分、粗蛋白、灰分含量不易跟季节环境因素而变化。不同部位间水分、蛋白、脂肪、灰分含量的显著性差异各月龄间无规律性,但从大体上部位因素对灰分和脂肪的影响较小。
This study investigated the nutritional composition of different skeletal muscles（Bbiceps femoris,Longissimus dorsi and Triceps brachii） in grazing Ujumqin sheep at 1,3,6,9,12 and 18 months of age.For this,the contents of water,crude protein,fat and ash in the skeletal muscles were determined.The results showed that the contents of water and ash in sheep muscles significantly decreased with increasing age（P ＆lt; 0.05）.A lower level of crude protein was detected in 3-month-old Ujumqin sheep,but no significant difference in crude protein content was found between older and younger Ujumqin sheep.Fat content was higher in the skeletal muscles of Ujumqin sheep aged 9 and 18 months but lower in those aged 3 and 12 months.These data suggest that fat content in Ujumqin sheep meat varies depending on age and seasonal environmental changes,whereas the contents of water,crude protein and ash remain relatively stable.Overall,little difference in the contents of ash or fat was observed among different skeletal muscles of Ujumqin sheep,although the significant differences in all nutritional indexes examined among the skeletal muscles were not regularly associated with the age of Ujumqin sheep.
出处
《肉类研究》
2013年第7期30-34,共5页
Meat Research
基金
国家自然科学基金地区科学基金项目(2076600)
内蒙古自然科学基金项目(2010MS1304)
