In inseminating Boer ewes with frozen semen straws, the conception always linger about 40%. Compared with the 90% of conception rate frozen bull semen straws is very great, so quicke development of boer goate is seriously harrased.

• 利用细管冻精进行布尔山羊人工授精,其受胎率总是徘徊在40%25左右,与牛人工授精90%25的受胎率相比差异甚大,从而严重制约了布尔山羊的快速发展。