包头地区不同产犊季节奶牛产奶量和泌乳曲线解析

发布时间：2018-04-08 19:04

本文选题：奶牛　切入点：产犊季节　出处：《家畜生态学报》2017年04期

【摘要】：通过连续5年每月定期测定不同产犊季节奶牛2 179头次的产奶量,绘制季节性产奶量变化曲线、泌乳曲线,并计算305d产奶量,探讨不同产犊季节奶牛产奶量和泌乳曲线及其机理。结果表明,3~8月份产奶量较高,促进产奶潜力的正常发挥,而9~2月份产奶量较低,阻碍产奶潜力的发挥,两个阶段产奶量差异显著(P0.05);春、冬、秋、夏产犊时奶牛305d产奶量分别为8 298.5、8 280.2、8 139.2、7 924.5kg,其中春冬与夏之间差异极显著(P0.01),秋与夏间差异显著(P0.05),不同产犊季节奶牛泌乳曲线变化趋势不同。包头地区不同产犊季节奶牛305d产奶量,春冬季最高、夏季最低,而秋季居中。其305d产奶量取决于一个泌乳期中促进(或阻碍)产奶潜力发挥季节的产奶天数长短和所处泌乳阶段。
[Abstract]:The milk yield of 2 179 cows in different calving seasons was measured regularly for 5 consecutive years, and the seasonal milk yield curve and lactation curve were plotted, and the milk yield of 305 days was calculated.The milk yield, lactation curve and mechanism of dairy cows in different calving seasons were studied.The results showed that the milk yield was high in August and promoted the normal development of milk production potential, but the milk yield in September and February was low, which hindered the development of milk production potential. The difference of milk yield between the two stages was significant (P 0.05); in spring, winter and autumn, the milk yield was lower than that in spring, winter and autumn.The milk yield of dairy cows in different calving seasons in Baotou was the highest in spring and winter, the lowest in summer, and the middle in autumn.The milk yield of 305d depends on the number of days and the lactation stage of the season in which the potential of milk production is promoted (or obstructed) in a lactation period.
【作者单位】：内蒙古农业大学动物科学学院;内蒙古自治区农牧业科学院;包头市开元乳业有限责任公司;
【基金】：“十二五”农村领域国家科技计划课题(2012BAD12B09)
【分类号】：S823

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