【摘要】 <正> 当前世界各国养羊业,多在引入早熟、多胎、四季发情,生长发育快等优良基因,同时改进繁殖技术、合理饲养以获得更高的经济效益。湖羊是我国优良的白色羔皮羊品种,所产羔皮洁白美观,为我国独有的传统出口物资。其四季发情、多胎高产的繁殖特性更为世界所瞩目。因此,研究湖羊的主要繁殖特性及其影响因素,不仅在当前具有提高湖羊繁殖能力、增加羔皮产量的现实意义,而且在深入研究湖羊品种特性的基础上,使这一宝贵资源在我国乃至世界养羊业中发挥更大的作用,具有重要的理论上的参考价值。更多还原

【Abstract】 The results of the experiment show that Hu-Yang can be in heat, ovulate and lamb in four seasons; short lighting is favourable to the development of eggs and ovulation; better feeding and management practice before and during mating period can increase the number of eggs, pregnancy rate and embryo livability. There tends to be a positive relationship between the progesterone content in peripheral blood and the number of eggs and embryo livability 30 days before pregnancy.更多还原