内蒙古白绒山羊抓绒性状变化规律的研究

试验参考内蒙古白绒山羊2003~2011年的生产性能记录,并对产绒量和抓绒后体重之间的关系进行了分析与讨论,研究中利用Excel和SAS程序整理数据。产绒量在2004、2008、2009、2011年呈明显降低趋势,而抓绒后体重增加。随年龄变化,4岁之前产绒量逐渐增加,4岁以后开始下降但仍有极少数羊的产绒量存在不同程度增加;抓绒后体重随着年龄增长而增加。在不考虑年份环境因素的影响下,产绒量与抓绒后体重4岁之前随年龄变化趋势一致,但随产绒量增加,抓绒后体重出现增加幅度变小的趋势;反之,随抓绒后体重增加,产绒量出现增加减缓趋势。而4岁以后,随产绒量增加,抓绒后体重降低;反之,随抓绒后体重增加,产绒量降低。表明在绒山羊生长后期产绒量和抓绒后体重之间存在一定的竞争作用。

Study on the Variation of Cashmere Yields of Inner Mongolia White Cashmere Goats

In this paper,data from 2003 to 2011 production performance records of Inner Mongolia White Cashmere goats were used to analysis and discuss the relationship between cashmere yield and weight after fleecing (WT). Excel and SAS were used to organize data in the study. Cashmere yield decreased in 2004,2008,2009,2011 years,but WT increased. As the growthof the age, the cashmere yield gradually increased before the fourth years old, and declined but there were a few still increasing phenomenon of varying degrees after the fourth years old,WT showed an increasing trend. Ignoring year's environmental factors the cashmere yield and WT had a same trend as the growth of the age before the fourth years old, but with the increasing of cashmere yield, the increasing of WT presented decrescent trend.Otherwise, with the increasing of WT, the added of cashmere yield slowdown. While the cashmere yield increased whereas WT decreased, and cashmere yield decreased but the fleece weight increased in the same wool production season. This research showed that there were some competition between the cashmere yield and WT grew together at the same time at the post-growing period.