本文以CRP配套系母猪系猪为材料，研究其排卵与胚胎活力。

The paper studied the ovulation rate and embryonic vitality of dam line pigs of CRP multiple cross systems.

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本研究对引进的英系大白猪在山东省日照市原种猪场的性能表现进行了观察与测定，并对该场母猪配种体况对繁殖性能的影响进行了研究。

Here we report the performance of British Large White on Rizhao Pig Breeding Farm in Shandong Province, which improved the British Large White in Sep. 1999.

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