摘要
试验于2008年5月15日—9月28日选用55只4月龄哈萨克公羔羊在新疆伊犁哈萨克自治州昭苏马场特克斯河北岸天然草场放牧,进行体重及体尺测定,其中20只羊进行消化试验。结果表明,整个试验期,放牧羔羊的生长发育随牧草和季节变化呈现出波动性,出现2个生长高峰(5月龄和7月龄)。体重总体呈上升趋势。7、8月龄间羔羊平均体重有显著差异(P<0.05),其余各月龄间差异极显著(P<0.01)。试验期各月龄羔羊平均日增重依次为(187.8±55.7)g、(100.1±44.7)g、(174.6±45.2)g和(82.1±36.0)g。放牧羔羊各项体尺指标相对增长幅度5月龄高于6月龄、7月龄高于8月龄;放牧羔羊体尺累积增长幅度从大到小排列为胸围、体长、体高、胸深、胸宽、管围。放牧羔羊DM、OM、CP消化率5月龄均极显著高于4月龄(P<0.01)。DM消化率5～7月龄在下降,5、7月龄间差异极显著(P<0.01);OM消化率6月龄和7月龄基本持平,8月龄时达到最大值,但5～8月龄羔羊各月龄间差异不显著;CP消化率5～8月龄在持续下降,7、8月龄间差异不显著,其余各月龄间差异极显著(P<0.01)。
55 Kazak male lambs chosed, body weight and body size were carried out at the north bank of Tekas natural grassland, Zhaosu horse farm, Yili Kazak Autonomous Prefecture in Xinjiang from May 15 to September 28, 2008. 20 lambs were selected for digestion. The results showed that the entire research period, there was a fluctuation in the growth of lambs pastured as the seasonal variations in forage. The growth of lambs reached the highest level at 5 months and 7 months, respectively. The body weight gain overally increased. There was significant difference in the average body weight gain of the lamb aging 7 or 8 months （P^O. 05）. However, there was obvious significant difference in average body weight gain of the remaining lamb （P〈0.01）. The monthly average daily gain were （187.8±55.7） g,（100.1±44. 7） g,（174.6±45.2） g and （82.1±36.0） g, respectively. Growth rate of pastured lamb body size of 5 months old lamb was bigger than that of 6 months old one, 7 months old lamb was bigger than that of 8 months old. In addition to thoracic deep, the order of the cumulative growth rate of the pastured lamb body size from big to small were chest, body length, body height, thoracic deep, wide chest, tube circuit, respectively. The DM, OM, CP digestion rate of 5 months old lamb were significantly higher than that of 4 months old one（P〈0.01）. There was decrease in DM digestion rate between 5 and 7 months, the difference between 5 and 7 months was significant （P〈0.01）. There was consistent in OM digestion rate between 6 and 7 months, there was biggest when 8 months. There was decrease in CP digestion rate between 5 and 8 months, there was no significantly difference between 7 and 8 months, However, there was significant difference in the CP digestion rate for the rest of the months （P〈0.01）.
出处
《中国畜牧兽医》
CAS
北大核心
2009年第7期33-36,共4页
China Animal Husbandry & Veterinary Medicine
基金
自治区科技重大专项"新疆肉用牛羊科学饲养技术集成与示范"项目(200731135-2)
关键词
体重
采食量
消化
放牧羔羊
body weight
feed digest
intake
grazing lambs
作者简介
贾帅兵（1983-），男，河南人，硕士生，研究方向：反刍动物营养。
余雄（1958-），男，四川人，教授，博士生导师，主要从事动物营养与饲料科学教学与研究工作。E-mail：nutrilab@xjau．edu．cn
