良种的

It was found, in one livestock elite station of Xuzhou, the ejaculum quality,eros and performance of some adult bulls were poor in recent years.

近几年来，徐州市某家畜良种站饲养的部分年公牛表现常年精液品质不良，性欲差，产能力低下。

Based on the years experiences, the author summarized and provided the main criterion and technique measures for improved cytoplasmic male sterile monogerm hybrid sugarbeet of seed reproduction.

摘要总结了多年雄性不育甜单胚型杂交种的良种繁育实践经验，对该类品种的良种繁育主要原则和技术措施进行探讨。