年龄对新疆山羊主要经济性状的影响

对新疆轮台县的186只1～5岁的新疆山羊的产绒资料进行分析 ,包括产绒量、绒层厚度和绒纤维直径.分析上述这些性状随年龄变化的规律.通过统计分析,并使用SPSS13.0软件包进行差异显著性检验,结果表明:1～3岁, 所有性状呈上升趋势,到3岁达最大(产绒量155.8 g、绒层厚度3.64 cm、绒纤维直径15.98 μm) ,显著高于其它年龄(P<0.05),4岁开始明显下降.从整体发展趋势来观察,2～4岁是新疆山羊产绒性能的理想和稳定时期.因此,根据这一规律,可以优化羊群结构,提高利用羊群的生产力,从而提高绒山羊饲养的经济效益.

Effect of Age on Main Economic Traits of Xinjiang Cashmere Goat

The measures and record performances data of 186 Xinjiang Cashmere Goat aged from 1-year-old to 5-year-old of Luntai County,including cashmere yield,thickness of fleece and fiber diameter,and their changing rule of these traits with age change were analyzed.The results showed that all traits increased with its age from 1 to 3 years old,and at 3-year-old,all traits reached the maximum(155.8 g,3.64 cm,15.98 μm) and were higher than that of other age significantly(P<0.05).During 2 to 4-year-old,all traits are stable.After 4-year-old,all traits decreased obviously.Moreover,it is the best period for goat to produce cashmere during 2 to 4-year-old.As a result,in terms of above rule,productivity of the flock as well as economic benefit can be increased by making proper structure of the flock.