Effects of the birth weight,gestational age,and generation interval on the performance of postpartum lactation in dairy cows
[Objectives]The effects of different stages including the birth,mating,and gestation on the per-formance of postpartum lactation in dairy cows were studied to fully utilize the potential of milk production in young cows after calving.[Methods]Data on the date of birth,the date of mating,the date of gestation,calving,the birth weight of calf,and the yield of postpartum lactation in young cows from two large-scale dairy farms in Shihezi,Xinjiang were collected from January 2021 to December 2023.The correlation between the birth weight,gestational age,generation interval,and the performance of postpartum lactation in young cows was analyzed.[Results]The birth weight,mating weight,gestational age,and generation interval of young cattle sig-nificantly affected the performance of postpartum lactation in young,with a positive correlation(P<0.05).Young cows with a birth weight of 37 kg or more,a mating weight of 410 kg,a gestational age of above 438 days,and a generation interval of 711 days or more had relatively higher yield of first postpartum lactation.[Conclusions]The management of nutrition in young cows during gestation should be strengthened,while rea-sonably controlling the mating weight and gestational age,and optimizing the generation interval.
Holstein young cowsbirth weightmatinggestational agegeneration intervalyield of lacta-tionmanagement of nutrition
万方数据
维普
