【摘要】 [目的]探索牛乳中脂蛋白比在不同胎次、产犊季节、泌乳月份和测定季节的变化规律。[方法]对我国荷斯坦奶牛牛奶中FPR及乳成分相关指标进行测定,分析胎次、产犊季节、泌乳月、测定日产奶量、乳成分、测定季节等因素对乳中脂蛋白比的影响。[结果]该牛场脂蛋白比为1.26±0.19,胎次、泌乳月和测定月份对脂蛋白比的影响达到显著水平(P<0.05),而产犊季节对脂蛋白比无显著影响(P>0.05)。第1胎奶牛乳中脂蛋白比(1.23±0.17)显著低于第4胎次奶牛(1.32±0.2)。第1个泌乳月脂蛋白比最高(1.49±0.26),2~6个泌乳月脂蛋白比逐渐下降,7~12个泌乳月脂蛋白比基本保持不变,此后又开始下降且达到最低(1.17±0.17)。[结论]胎次、泌乳月和测定月份对脂蛋白比的有显著影响,而产犊季节对脂蛋白比的影响不显著。更多还原

【Abstract】 [Objective]The objective of this study was to explore the effects of the different parity,calving season,lactation month and seasons on fat-to-protein ratio(FPR).[Method]The relevant indicators of FPR and milk composition in Holstein cow were determined.The effects of the different parity,calving season,lactation month and seasons on FPR were analyzed.[Result]The FPR were 1.26 ± 0.19.Different parity,lactation month and seasons have greatly significant effects on FPR(P < 0.01),but calving season has no significant effect on FPR(P > 0.05).The FPR in the first parity(1.23 ± 0.17) is significantly lower than the other parities(1.32 ± 0.2).The FPR in the first lactation is the highest,and it drops sharply from 2th to 6th of lactation month.It’s unchanged from 7th to 12th of lactation month,then falls to the lowest in the end periods of lactation(1.17 ± 0.17).[Conclusion]Parity,lactation month and seasons have greatly significant effects on FPR,and calving season has no significant effect on FPR.更多还原