摘要
湖羊是世界上稀有的绵羊地方品种,以多胎、早熟、早期生长发育快、宜舍饲等优良性能而著名。为系统了解湖羊生长发育的基本规律,更好地开发利用湖羊这一优良地方品种资源,本研究以3,6,12和24月龄湖羊公羊为对象,每个时间点随机选择6只,共24只,测定其体重、组织器官及消化道各个部分重量、肠道长度及肉品质相关参数。结果表明,3~6月龄湖羊生长速率最快,6月龄之后逐渐降低;3~6月龄之间心、肝、脾、肺、肾、头蹄和皮的增长强度随着日龄的增大而增长,除头、蹄、皮外,其他内脏器官的生长强度逐渐降低,12月龄之后趋于稳定;头、蹄、皮的生长在6月龄之后趋于稳定,仍然保持较高的生长强度;瘤胃的生长强度始终大于体重生长强度,小肠的生长始终小于体重,而除直肠外,大肠的生长强度与体重相近。6月龄湖羊公羔与12月龄相比屠宰率、眼肌面积无显著差异,而6月龄湖羊公羔背膘厚极显著增高,随着年龄的增长肉色逐渐变暗。综合以上各项指标认为,本试验条件下,6月龄为肥羔生产最佳屠宰日龄。
Hu sheep are one of the world＇s rare localised sheep breeds; it is known for high fecundity, early maturity, rapid growth rates and being suitable for stabling. In order to understand the growth and development and enable better utilization of the traits of Hu sheep male sheep 3, 6, 12 and 24 months of age were assessed to determine live weight, the weight of different body components including the digestive tract weight, intestinal length, and meat quality traits. Results indicated that Hu sheep grow fastest between 3 to 6 months of age; after 6 months, relative growth rates begin to decline. Organ growth （heart, liver, spleen, lung, kidney, head and feet, skin and wool） increased with age between 3 to 6 months, though the head, feet, skin and wool were relatively stable, growth of remaining organs gradually reduced becoming stable by age 12 months. The growth rate of the rumen was always greater than growth in live weight, while the growth rate of the small intestine was less, with the exception of colorectal growth which was similar to live weight growth. Compared to12 month old sheep, 6 month old male Hu sheep have better back fat thickness and eye muscle area with no difference in dress out and loin eye area. Meat colour darkened with age. It was concluded that the optimal age for slaughter was 6 months.
出处
《草业学报》
CSCD
北大核心
2017年第1期168-177,共10页
Acta Prataculturae Sinica
基金
甘肃省科技支撑计划(144NKCC049)
现代农业产业技术体系建设专项资金(CARS-39)
高等学校博士学科点专项科研基金(博导类)(20130211110033)资助
关键词
湖羊
生长发育
组织器官
胃肠道
肉品质
Hu sheep
growth and development
visceral organ
gastrointestinal tract
meat quality
