不同补饲水平对陕北白绒山羊产绒性能的影响

Effects of Different Supplementary Feeding Levels on Cashmere Performance of Shanbei White Cashmere Goats

通过研究不同补饲水平对陕北白绒山羊绒的生长和产绒量的影响,探索陕北白绒山羊在冬春季节枯草期放牧时的补饲方案。试验抽取横山县某羊场同年龄段体重相近健康的陕北白绒山羊成年母羊120只,随机分为四组,每组30只。对照组,每天补饲0.2kg玉米;三个试验组分别每天补饲配合精料0.2、0.3、0.4kg。结果表明,在自然放牧条件下,陕北白绒山羊在冬春枯草季节通过补饲可延长绒毛的快速生长期至12月份,而1月至抓绒前绒毛生长缓慢。试验期内0.2kg组、0.3kg组、0.4kg组绒长的增长量分别较对照组增加了66.45%,67.10%,72.36%,产绒量分别提高了26.75%、29.62%、22.48%,三个试验组绒长度及产绒量均显著高于对照组(P<0.05),各试验组之间差异不显著(P>0.05)。研究表明,成年母羊在冬春季节归牧后,补饲0.2kg配合精料可显著提高绒毛的长度和产绒量,但进一步增加配合精料的补给量,效果并不明显。

Abstract. In order to investigate the effects of different supplementary feeding levels on production performance of cashmere, 120 Shanbei white cashmere adult female goats were selected according to age and body weight in Hengshan County in shaanxi province. The goats were randomly divided into 4 groups, and 30 in every group. One group was treated in the control group （0.2 kg/d corn）, and the others were supplementary feeding groups （0.2 kg/d concentrate, 0.3 kg/d concentrate and 0.4 kg/d concentrate,respectively）. The results showed that cashmere rapid growth stage would extend to December by means of supplementary feeding in spring and winter under the natural grazing condition, and cashmere would slow- ly increase from January. The cashmere length of three supplementary feeding groups respectively in- creased by 66.45%, 67.10%, and 72.36% than that of the control group （P〈0.05）, and cashmere yield increased by 26.75%/00, 29.62%, and 22.48% （P〈O. 05）. In conclusion, O. 2 kg/d concentrate group could significantly increase cashmere length and cashmere yield than O. 2 kg/d corn group, but there were not significant differences among the three supplementary feeding groups （P〉O. 05）.