年份对内蒙古白绒山羊体重和产绒性能影响的研究

为研究内蒙古白绒山羊不同年份生产性能变化状况,本试验采集了1998-2005年八年间2863只内蒙古白绒山羊的产绒量、绒长度、毛长度和体重数据,对其进行统计分析。结果表明:绒山羊产绒量、绒长度、毛长度和体重随年份不同呈现显著变化(P<0.01);除个别年份,产绒量、绒长度和体重随年份推进呈增加趋势;2000年后各性状表型值较1998、1999年有较大提高。因此,本品种选育工作效果显著,各表型性状得到稳定提高,在保持绒毛品质的基础上加强产绒性状选育,可进一步提高内蒙古白绒山羊的产绒性能。同时,根据各年度放牧场牧草生长状况,调整载畜量,禁止重牧;较差年景进行适度补饲,弥补绒山羊不足养分,降低年际效应对绒山羊生产性能的影响,是提高绒山羊产绒性能的必要手段。

Effect of Different Years on Body Weight and Cashmere Production Performance of Inner Mongolia White Cashmere Goats

The experiment aimed at studying the effect of different years on cashmere production performance of Inner Mongolia white cashmere goats.The data were analyzed on cashmere weight,cashmere length,guard hair length and body weight of 2863 cashmere goats from 1998 to 2005.The results showed that different years had significant effect on cashmere weight,cashmere length,guard hair length and body weight(P < 0.01).Cashmere weight,cashmere length and body weight had increased from 1998 to 2005 except very few years.After 2000 these traits had higher improved compared with 1998 and 1999.Therefore,the work of breeding selection have much enhanced and phenotypic traits have been increased.Keeping the cashmere quality performance and enhancing the selection of cashmere production,may be farther increase the cashmere performance of Inner Mongolia white cashmere goats.According the grass of pasturage adjusted the number of goats,forbidding over pasture.It is important that add forage to make up for the lacked nutrition of goats in baddish year and reduce the effect of different years on production performance.