中文摘要：

褪黑激素能缩短绒山羊绒毛生长周期，促进绒毛生长，提高绒毛产量。绒山羊绒毛呈现生长、休眠、脱落的周期性变化，与褪黑激素的分泌息息相关。作者综述了褪黑激素的分泌、功能，绒毛的周期性变化，讨论了褪黑激素促进绒毛生长的作用机制，以期为在分子水平阐述褪黑激素对绒毛生长的调控机制提供依据，为将褪黑激素更好地应用于绒毛生产提供参考。

英文摘要：

Abstraet：Melatonin can shorten the growth cycle of cashmere in cashmere goat, promote the growth of cashmere, increase the production of cashmere. The cashmere presents cyclical variation that includes anagen, catagen, telogen, which is related to cyclical variation of melatonin＇ s secretion. The paper reviewed the secretion and function of melatonin, cyclical variation of cashmere, discussed the mechanism that melatonin promotes cashmere growth. The paper aims to not only provide foundation for elaborating regulatory mechanisms of melatonin promoting cashmere growth at the molecular level, but also provide refer- ence for effectively application of melatonin in cashmere＇s production.