Development of clinical therapeutic methods against failure of fertilizing functions causing summer infertility in boars

为了改善夏季公猪精子质量下降的状况，稳定提供精液，保证全年稳定生产猪肉，本试验研究了一种新的公猪精液保存稀释液、一种新的公牛冻融精子质量评价方法和一种提高公牛冻融精子可复性的方法。公牛精子用作公猪精子的参照。改良的猪精液稀释液提高了受胎率。在公牛中，找到了新的精子鉴定方法，改进了公牛精液冷冻稀释液，提高了精子的复活率。

In an attempt to improving boar sperm quality which decreases in summer and stable provision with semen leading to stable production of pork during the year, this study investigated a new diluent for boar semen storage, a new method to evaluate frozen-thawed bull sperm quality and development of a method to improve fertilizing ability of frozen-thawed bull spermatozoa. Bull spermatozoa were used as a reference to boar spermatozoa. Modified diluents for boar semen improved conception rates. In bulls, new method for sperm evaluation was found out and modification of diluent for freezing bull semen enabled improvement of sperm fertilizing ability.