江苏地区荷斯坦犊牛初生重影响因素分析

Analysis of Factors Affecting Birth Weight of Holstein Calves in Jiangsu Province

为探索影响犊牛初生重的因素,收集了江苏省某奶牛场2021年度正常健康产犊的荷斯坦牛产犊记录共6 515条。分析不同出生季节、胎次、母牛BCS、在胎天数对初生重的影响。结果表明:夏季出生的犊牛体重最高;头胎牛产的犊牛初生重最低;产母犊群体中,BCS4分及以上的牛所产犊牛初生重显著高于3分牛只(P<0.05);随着在胎天数的增加,犊牛初生重显著增加(P<0.05)。初生重与在胎天数和母牛BCS呈极显著正相关(P<0.01)。

To explore the factors affecting calf birth weight,6515 Holstein calving records from a dairy farm in Jiangsu province in 2021 were collected.The effects of birth season,parity,cattle BCS and days in gestation on birth weight were analyzed.The results showed that the weight of calves born in summer was the highest.The birth weight of the first-parity calf was the lowest.The birth weight of calves with 4 or more points was significantly higher than that of calves with 3 points(P<0.05).The birth weight of calves increased significantly with the increase of gestation days(P<0.05).Birth weight was positively correlated with gestational days and cow BCS(P<0.01).