【摘要】 本文采用大样本生物统计法分析了306份奶牛乳汁孕酮放射免疫测定结果,表明从四个乳区及一天三次挤奶所采的乳样中孕酮的含量均无显著差异(P>0.05),但早晨和下午挤奶时末乳混合乳中的孕酮含量明显比奶桶混合乳的要高(P<0.05,P<0.001)。一天三次挤奶所采奶桶混合乳的孕酮含量与末乳混合乳的相关与回归关系极显著(P<0.001)。更多还原

【Abstract】 Through large sample of biometrics progesterone concentrations of 306 milk samples assay by RIA were analysed. The results indicated that there was no significant difference in the progesterone concentration both from the daily three milkings and from the four compartments of the udder (p>0.05). In the morning and afternoon, however, the progesterone concentration of the pooled strippings was significantly higher than that of the pooled bucket milk (p<0.05, p<0.001). The correlation and the regression between the progesterone concentrations of pooled bucket milk in the daily three milkings and that of the pooled strippings was extremely significant (p<0.001).更多还原