摘要
根据西宁某奶牛场1984-1995年荷斯坦奶牛的配种产犊记录,按不同配种年龄、胎次与配种月份所产犊的性别进行统计分析。结果表明:配种年龄对奶牛产犊性别无显著影响(p>0.05);胎次与奶牛产犊性别的关系表现为第三胎所产公犊显著多于母犊(p<0.05),其它各胎次差异均不显著(p>0.05);配种月份对奶牛产犊性别的影响表现为3-5月配种所产犊牛有母犊多于公犊趋势,但差异不显著(p>0.05),6月-9月配种所产犊牛公犊显著多于母犊(p<0.05),其余各月份差异均不显著(p>0.05)。
Based on calving records(1984-1995)of Holstein-Friesian maintained at one of dairy cattle places in XiNing, used the method of statistieal analysis sex of calf of different breeding age ,parity and breeding month. The results indicated: Breeding age did not effect significantly sex of calf (p>0.05);Relations between parity and sex of calf show male calves calved by third-parity cows exceeded significantly female calves of them (p<0.05),difference of other parity were not significant (p>0.05 );Relations between breeding month and sex of calf show female calves calved by cows breeded at 3 -5months did not exceed significantly male calves of them (p>0.05 );Relations between breeding month and sex of calf show female calves calved by cows breeded at 6 till 9 moriths exceeded significantly female calves of them(p<0.05),difference of other parity was not significant(p>0.05).
出处
《中国奶牛》
北大核心
2003年第6期26-28,共3页
China Dairy Cattle
