Effects of melatonin implantation on cashmere yield, fibre characteristics, duration of cashmere growth as well as growth and reproductive performance of Inner Mongolian cashmere goats.
Effects of melatonin implantation on cashmere yield, fibre characteristics, duration of cashmere growth as well as growth and reproductive performance of Inner Mongolian cashmere goats.
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褪黑素植入对内蒙古绒山羊产绒量、纤维特性、产绒持续时间及生长繁殖性能的影响
DOI：
10.1186/s40104-015-0023-2
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发表时间：
2015
影响因子：
7
通讯作者：
Zhang W
中科院分区：
文献类型：
--
作者：
Duan C;Xu J;Sun C;Jia Z;Zhang W
背景：外源性褪黑素可诱导羊绒生长。然而，褪黑素植入诱导的羊绒羊毛生长不能与典型生长相结合，导致较早的脱落，随后是羊绒生长的另一个周期。为了解决这个问题，我们研究了褪黑素对绒山羊产量、纤维特性、生长和繁殖性能的影响。方法选取18只半同胞母山羊，分别于4月底和6月底进行对照和褪黑素（2 mg/kg BW）注射处理，每组9只。植入后大约1年观察羊绒生长和脱落。每月收集纤维样品以确定累计羊绒长度。计算了羊绒生长的起始和终止日期以及羊绒生长速率。记录羊绒产量、公羊增重、开胎日期、产仔数和出生体重。结果褪黑素植入使羊绒产量增加34.5%（对照组553.7 g，比褪黑素745.0 g， P< 0.01），羊绒长度增加21.3%（对照组95.2 mm，比褪黑素115.4 mm， P< 0.01），纤维直径减少4.4%（对照组14.6 μm，比褪黑素14.0 μm， P< 0.03）。在褪黑激素治疗的山羊中，平均开始日期比对照山羊早（2013年5月18日比2013年7月2日，P< 0.01），但停止日期相似（2014年3月22日比2014年3月27日）。因此，褪黑素处理山羊的羊绒生长时间比对照山羊长（307 d比270 d， P< 0.01）。最终体重、平均日增重、开玩笑日期、产仔数和出生体重不受褪黑激素植入的影响。结论4月下旬和6月2次（2 mg/kg BW）褪黑素在不影响羊绒生长速率和繁殖性能的情况下，通过诱导生长和典型生长相结合的方式提高了羊绒产量，降低了羊绒纤维直径。
BackgroundExogenous melatonin could induce cashmere growth. However, induced growth of cashmere fleece by melatonin implants cannot be combined with the typical growth, resulting in earlier shedding followed by another cycle of cashmere growth. To address this issue, we examine the effects on the cashmere yield, fibre characteristics, and the growth and reproductive performance of cashmere goats of planned administration of melatonin.MethodsEighteen half-sib, female goats were assigned to two treatments (n= 9) including a control and a treatment where melatonin (2 mg/kg BW) was implanted at the end of April and end of June. Cashmere growth and shedding were observed for approximately 1 year following implantation. Fibre samples were collected monthly to determine cumulative cashmere length. Initiation and cessation dates for cashmere growth as well as the rate of cashmere growth were calculated. Cashmere yield, weight gain of dam, kidding date, litter size, and birth weight were also recorded.ResultsMelatonin implantation increased cashmere yield by 34.5 % (control 553.7 g vs. melatonin 745.0 g;P< 0.01), cashmere length by 21.3 % (control 95.2 mm vs. melatonin 115.4 mm;P< 0.01), and decreased fibre diameter by 4.4 % (control 14.6 μm vs. melatonin 14.0 μm;P <0.03). In melatonin-treated goats, the average initiation date was earlier than in control goats (May 18, 2013 vs. July 2, 2013;P< 0.01) but there was a similar cessation date (March 22, 2014 vs. March 27, 2014). Consequently, the duration of cashmere growth was longer in melatonin-treated goats than in control goats (307 vs.270 days;P< 0.01). The final BW, average daily gain, kidding date, litter size, and birth weight were not influenced by melatonin implantation.ConclusionsThese data indicate that melatonin implantation (2 mg/kg BW) on two occasions (late April and June) increased cashmere yield by combining the induced growth of cashmere fleece with the typical growth and decreased the fibre diameter without changing dam growth rate or reproductive performance.
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影响因子：
1.8
作者：
NORTON, BW;KLOREN, WRL
通讯作者：
KLOREN, WRL
DOI：
10.5713/ajas.2007.1496
发表时间：
2007-10-01
期刊：
ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES
影响因子：
--
作者：
Yue, Chunwang;Du, Lixin;Jia, Zhihai
通讯作者：
Jia, Zhihai
影响因子：
2.8
作者：
Zarazaga, L. A.;Celi, I.;Malpaux, B.
通讯作者：
Malpaux, B.
影响因子：
1.8
作者：
Wuliji, T;Litherland, A;Gipson, T
通讯作者：
Gipson, T
影响因子：
7
作者：
Shamsaddini-Bafti M;Salehi M;Maghsoudi A;Tehrani AM;Mirzaei F;Momen SM
通讯作者：
Momen SM