摘要
根据合肥奶牛场（Ａ场）、保健奶牛场（Ｂ场）１９９０年和１９９１年夏季的生产记录和该地的气象资料，分析不同品系、胎次和泌乳阶段对荷斯坦乳牛耐热性的影响。结果表明：品系对荷斯坦乳牛耐热性具有显著影响，纯血丹麦荷斯但乳牛耐热性显著低于场内其他乳牛品系，其他品系间无显著差异；胎次增加，乳牛耐热性趋于降低，其中以第１胎最强，第３胎最弱，且胎次对Ａ场乳牛耐热性有显著影响；汾乳阶段对乳牛耐热性影响不显著。
The productive records of dairy herds in two Dairy Farm and the meteorological data inHefei during the summers of 1990 and1991 were used for studying the effects of strain parityand lactation stage on heat tolerance of dairy cows.There was significant difference betweenstrains in the heat tolerance of dairy cows.Pure bloed America Holstein cows and their crossblood cows had the highest heat tolerance,Baojian Holstein cows and their cross blood cows hadhigher heat tolerance, while pure Danish Holstein cows had the lowest heat tolerance.The heattolerance approximately showed a decline tendency with the increase of the parity,Dairy cows inthe first parity had the highest heat tolerance,and those in the third parity had the lowest heattolerance.The lactation stage had no significant in fluence on the heat tolerance of dairy cows.
出处
《安徽农业大学学报》
CAS
CSCD
1995年第1期77-81,共5页
Journal of Anhui Agricultural University
关键词
品系
胎次
泌乳阶段
耐热性
荷斯坦乳牛
Strain
Parity
Lactation stage
Heat tolerance
Holstein cows
