摘要
本研究在山羊非长绒季节(2~6月),在人工控制环境条件下,通过改变光周期和褪黑激素处理,探讨对绒山羊生产性能的影响。研究结果表明:每日8小时光照,不论褪黑激素处理与否,山羊都能长绒;每日16小时光照,经褪黑激素处理,可诱使山羊长绒。随产绒量增加,绒纤维长度和细度显著变化。光周期和褪黑激素是影响山羊绒生长的主要因素。
Foyty-eight F1cashmere goats(24 bucks and 24 does,average age 20months) were used in tworeplicates to investigated the effects of photoperiod and melatonin administration on cashmere fibre production.The goats were sheared after the natural cashmere growing season and blocked by sex and randomly assigned to one of four environmental chamber,which were maintained at constant temperature(25℃) and humidity (50%),with two chambers programmed for 8 hours of light and the others two for 16 hours of light. three goats in each chamber received a subcutaneous Regulin implant containing 150mg of slow release melatonin, The goats were fed a complete mixed ration and libitum consisting of 15% crude protein and 65% TDN and free acless to water.The results demonstrate that body weight was affect by photoperiod and sex(P<0.05).Total fleece,Cashmere yield(%),cashmere length and diameter were significantly by photoperiod and melatonin.cashmere yield was increased 94% byphotiperiod,and increased 154.8% by melatonin impland.However,guard hair as not effect by treatment.it appears that cashmere production andquality can be influenced by photoperiod and melatonin implant.
出处
《中国畜牧杂志》
CAS
北大核心
1995年第4期8-10,共3页
Chinese Journal of Animal Science