Rumen bypass melatonin and application of rumen bypass melatonin in regulation of reproductive hormone secretion of dairy cow

The invention provides rumen bypass melatonin and application of the rumen bypass melatonin in regulation of cow reproductive hormone secretion, and belongs to the technical field of livestock breeding, the rumen bypass melatonin is melatonin coated with acrylic resin, and the rumen bypass melatonin is used for regulating cow reproductive hormone secretion. When the rumen bypass melatonin is fed to dairy cows, degradation of the melatonin in rumen of the dairy cows can be reduced, absorption of the melatonin in small intestines of the dairy cows is promoted, secretion of reproductive hormone of the dairy cows can be adjusted, and therefore the rumen bypass melatonin can be used for promoting reproduction of the dairy cows; the invention also provides a reference basis for application of melatonin in dairy cow production practice, and has important practical significance for improvement of pasture production benefits. 本发明提供一种过瘤胃褪黑素及其在调节奶牛生殖激素分泌方面的应用，属于畜牧养殖技术领域，所述过瘤胃褪黑素为使用丙烯酸树脂进行包被后的褪黑素，所述过瘤胃褪黑素用于调节奶牛生殖激素的分泌。本发