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| 北京地区荷斯坦青年牛繁殖性状影响因素分析 | |
| 引用本文： | 郭翔羽,郭刚,李锡智,刘林,郑维韬,杨通广,张振山,张毅,王雅春,张胜利,张沅. 北京地区荷斯坦青年牛繁殖性状影响因素分析[J]. 中国奶牛, 2011, 0(24): 1-6 |
| 作者姓名： | 郭翔羽 郭刚 李锡智 刘林 郑维韬 杨通广 张振山 张毅 王雅春 张胜利 张沅 |
| 作者单位： | 1. 中国农业大学动物科技学院,北京,100193 2. 北京三元绿荷奶牛养殖中心,北京100029／中国农业科学院北京畜牧兽医研究所,北京100193 3. 北京三元绿荷奶牛养殖中心,北京,100029 4. 北京奶牛中心,北京,100085 |
| 基金项目： | 优质奶牛新品种，现代农业产业技术体系建设专项资金 |
| 摘 要： | 本研究利用北京地区23个奶牛场105头公牛的25705个女儿繁殖记录,对中国荷斯坦青年牛的4个繁殖性状,包括青年牛初配日龄（AFI）、青年牛妊娠日龄（AFP）、青年牛初产日龄（AFC）和输精次数（NS）,采用固定模型通过SAS9.1软件GLM过程进行统计分析。结果表明,牛场、出生年份、出生季节以及公牛等效应对青年牛繁殖性状具有显著（P〈0.05）或极显著影响（P〈0.01）。通过提高饲养管理水平,给母牛创造良好的生存环境,选用具有优秀繁殖性能的种公牛,可有效提高母牛繁殖效率。 |
| 关 键 词： | 中国荷斯坦牛 青年牛 繁殖性状 固定效应 |
Analysis of Causal Factors on Reproduction Traits for Holstein Heifers in Beijing Area |
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| GUO Xiang-yu,GUO Gang,LI Xi-zhi,LIU Lin,ZHENG Wei-tao,YANG Tong-guang,ZHANG Zhen-shan,ZHANG Yi WANG Ya-chun,ZHANG Sheng-li,ZHANG Yuan. Analysis of Causal Factors on Reproduction Traits for Holstein Heifers in Beijing Area[J]. China Dairy Cattle, 2011, 0(24): 1-6 | |
| Authors: | GUO Xiang-yu GUO Gang LI Xi-zhi LIU Lin ZHENG Wei-tao YANG Tong-guang ZHANG Zhen-shan ZHANG Yi WANG Ya-chun ZHANG Sheng-li ZHANG Yuan |
| Affiliation: | 1.College of Animal Science and Technology, China Agriculture University, Beijing 100193; 2. Beijing Sanyuan Breeding Technology Co., Beijing 100029;3.Beijing Dairy Cattle Center, Beijing 100085; d.Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193) |
| Abstract: | Reproductive data of 25 705 Chinese Holstein heifers was analyzed to evaluate the factors affect heifer reproduction efficiency. The heifers were daughters of 105 sires raised in 23 farms in Beijing, China. Age at first insemination （AFI）, age at first pregnancy（AFP）, age at first calving（AFC）, and number of services（NS） were analyzed using a fixed model through the General Linear Model（GLM） procedure of SAS program （SAS 9.1）. Results showed that fixed effect of farms, year of birth, season of birth and the sires had significant effects on the fertility traits in heifers（P〈0.01）. Therefore, the improvement of fertility efficiency would be achieved by improving feeding and management in farm to provide heifer a comfort environment and utilizing seed-stock bulls with outstanding reproductive performance. |
| Keywords: | Chinese Holstein Heifer Reproduction traits Fixed effect |
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