荷斯坦奶牛性控精液人工授精试验

试验对荷斯坦奶牛常规精液和性控精液人工授精效果以及性控精液对青年牛和经产牛的效果进行了比较分析。结果表明：采用性控精液（200万个／0．25m）人工授精的受胎率为66．7％，第一情期受胎率68．8％，采用常规精液（1000万个／0．25mL）人工授精的受胎率为83．3％，第一情期受胎率76％，性控精液和常规精液差异不显著（P〉0．05），用性控精液人工授精，青年牛受胎率78．6％，经产牛受胎率62．2％，差异不显著（P〉0．05）。经济效益分析表明，采用性控精液人工授精可以有效地提高奶牛养殖的经济效益。

Comparison of holstein cow breeding between sexual control semen and ordinary semen was analyzed. The results showed that the conception rate was 66.7 after breeding with sexual control semen（2 million seeds/0.25ml）.The conception rate of 1st oestrous period was 68.8% The conception rate was 83.3 after breeding with ordinary semen （10 million seeds/0.25 ml）.The conception rate of 1st oestrous period was 76% .The differences ofthe conception rate between sexual control semen and ordinary semen were not significant （P〉0.05）.The conception rate of yong cow was 78.6% ,and cow by the middle was 62.2% Analysis of economic benefits showed thatbreeding with the sexual control semen could increase economic benefits.