褪黑素对内蒙阿白山羊在非生绒季节促绒生长及绒产量的影响

用简易的外科手术在阿白山羊梳绒后的非长绒季节，给羊体颈部皮下埋植一种含褪黑素的胶囊试验，经５周后受试羊群长出了新绒，对照群则未见新绒生长。在８月下旬天然生绒季节快下到时，试验组羊绒已长至近３公分；而对照群才开始生绒，但绒长不足１分分。表明含上述激素胶囊促绒生长首次成功。翌年对上述羊群跟踪检测结果：受试羊群个体产绒量的特级（≥４５０克／头）率。提高为５０－６８．４％，与对照群（３５％）相比，提高１５

EFFECTS OF MELATONIN ON THE CASHMERE GROWTH AND PRODUCTION WHITE CASHMERE GOATS

Inner Mogolia Cashmere Goats were treated with melatonin implant in the end of may, 1992.Twenty goats were received a high dose and 20 received 2 lower dose implant, another 20 received nothing as control group.The cashmere was initiated to start gowing 5 week later after the melatonin implant,while nothing was happened in the control group.Measurement was made on August 30th.The mean maximum length of cashmere was ranged 2.9-4.0 cm for the treated goats and only 0.94 cm for the control group.The yield of cashmere in the treated and control groups was increased to 11-14% and 8% measured on May 25th, 1993 compairing with goats which were not included into the experiment.The frequencies of goats which produced more than 450g cashmere was about 50%-68.4% in the trat groups and only 35% in the control.group.The length of cashmere was increased up to 5cm in average for the treated animals,as well as for the control goats.The natural loss of cashmere may be existed,because some treated goats produced cashmere up to 6-7cm in length.The quality,quantity,and diameter of cashmere production of the treated goats were as same as the control ones.Melatonin implant did not influence the body weight of the treated goats. Not like the treated goats the control group of goats grew cashmere only during autumn and winter period.