Melatonin and cashmere growth in Inner Mongolian cashmere goats
Melatonin and cashmere growth in Inner Mongolian cashmere goats
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内蒙古绒山羊的褪黑激素和绒毛生长
DOI：
10.1139/cjas-2015-0018
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发表时间：
2016-06-01
影响因子：
1
通讯作者：
Zhang, Wei
中科院分区：
文献类型：
--
作者：
Duan, Chun-hui;Xu, Jian-hai;Zhang, Wei
翻译后摘要：本研究的目的是调查褪黑激素植入对绒山羊的绒生长和生产性能的影响。共30只雌性山羊被分配到三个治疗组（n = 10），包括对照组和两个治疗组，其中褪黑激素[2 mg kg-1体重（BW）]在4月和6月或6月植入。与对照组相比，4月和6月埋植的产绒量和最大绒长分别提高了20.3%和15.7%（P < 0.01），平均埋植开始日期为2013年5月22日，停止日期为2014年3月26日。相比之下，直到2013年6月19日，在对照山羊中没有观察到羊绒生长，并且在2014年4月3日停止生长。仅在6月植入褪黑激素对产绒量和最大绒长没有影响，平均开始日期为2013年6月5日，停止日期为2014年3月27日。褪黑激素植入对山羊的绒生长率、绒纤维直径、最终体重和平均日增重没有影响。结果表明，在山羊非生长期植入褪黑激素能有效地促进山羊绒的生长，延长山羊绒的生长期，其中4月和6月是植入褪黑激素的最佳时间。
Abstract: The aim of the study was to investigate the effects of melatonin implants on cashmere growth and productive performance of cashmere goats. A total of thirty female goats were assigned to one of three treatments (n = 10), including control and two treatments where melatonin [2 mg kg-1 body weight (BW)] was implanted either in April and June or in June. Compared with the control, implantation in April and June increased cashmere yield and maximum cashmere length by 20.3% and 15.7%, respectively (P < 0.01), with an average initiation date of 22 May 2013 and cessation date of 26 Mar. 2014. In contrast, no cashmere growth was observed in control goats until 19 June 2013 and the growth ceased on 3 Apr. 2014. Melatonin only implanted in June had no effect on cashmere yield and maximum cashmere length, with an average initiation date of 5 June 2013 and cessation date of 27 Mar. 2014. Cashmere growth rate, cashmere fiber diameter, the final BW, and average daily gain were not influenced by melatonin implantation. Results suggested that melatonin implantation during the cashmere nongrowing period is an effective way to stimulate cashmere growth and extend the cashmere growth phase with April and June identified as the most appropriate time for implantation.