heifer相关论文
The current review is designed with aims to highlight the impact of heat stress (HS) on calves and heifers and to sugges......
[目的]为提高母牛的利用年限、缩短后备母牛的培育时间、探索BMY青年牛的适配年龄（体重）和提前妊娠产犊对母畜和犊牛的影响。[方法]......
[目的]人绝经期促性腺激素（HMG）是一种具有促卵泡素（FSH）和促黄体素（LH）活性的蛋白质激素,为了比较HMG和FSH一次性注射青年母牛的药代动......
旨在探究青年牛繁殖性状遗传能力群体遗传参数,评估不同配种季节间青年牛繁殖性状基因型与环境的互作效应(G×E)。本研究利用......
【目的】旨在考察饲粮中添加β-胡萝卜素对肉牛后备母牛卵泡发育的影响。【方法】选取12头体重相近(285 kg±12.3 kg)15月龄健......
【目的】研究日粮蛋白能量比对8—10月龄中国荷斯坦后备奶牛生长性能和营养物质消化的影响。【方法】选用18头平均月龄7.70±0.48......
The current review is designed with aims to highlight the impact of heat stress(HS) on calves and heifers and to suggest......
选用4头装有瘤胃瘘管的西门答尔牛,用常规全收粪法测定柠条锦鸡儿(Caragana korshinskii)的消化率,用瘤胃尼龙袋法测定瘤胃降解率;......
本研究旨在进行青年母牛的早期选育工作,为快速扩繁生产优秀胚胎提供早期选择供体牛的标准。首先利用宁夏荷斯坦牛DHI、体型鉴定数......
本试验通过给育成牛肌肉注射维生素ADE注射液,检测血清生化相关指标变化情况,以深入了解肌肉注射维生素ADE对动物生理生化功能的影......
选用８３头１４～１５月龄的育成母牛分成两组，试验１组选小以牛冷冻精液配种，试验２组对公牛不进行筛选，即用大、小型公牛的冷冻精液本性中。另选４６头１８月龄......
[目的]为提高母牛的利用年限、缩短后备母牛的培育时间、探索BMY青年牛的适配年龄（体重）和提前妊娠产犊对母畜和犊牛的影响。[方法]......
[目的]人绝经期促性腺激素（HMG）是一种具有促卵泡素（FSH）和促黄体素（LH）活性的蛋白质激素,为了比较HMG和FSH一次性注射青年母牛的药代动......
Lowering production costs while maintaining an optimal level of production is important to producers in extensive enviro......
为探讨无患子皂甙对25-28月龄中国荷斯坦后备奶牛生产性能、营养物质消化率、瘤胃发酵和血液生化指标的影响,试验选用16头平均月龄......
Association between growth rates, age at first calving and subsequent fertility, milk production and
Age at first calving (AFC) affects the profitability of dairy enterprises. This study examined the relationships between......
对２０头黑白花青年母牛应用孕马血清促性腺激素处理诱发发情。结果：外理后１－９ｄ内出现发情的有１８头，发情率为９０％，未发情率为１０％；５冰对照牛发情率为１０％，未发情......
A Study of Dairy Heifer Rearing Practices from Birth to Weaning and Their Associated Costs on UK Dai
There are many inputs into the dairy replacement herd which impact not only on the cost of rearing heifers from birth to......
A Study of Dairy Heifer Rearing Practices from Birth to Weaning and Their Associated Costs on UK Dai
There are many inputs into the dairy replacement herd which impact not only on the cost of rearing heifers from birth to......
Analysis of the Management and Costs Associated with Rearing Pregnant Dairy Heifers in the UK from C
Good management of the pregnant heifer is crucial to ensure that she is well grown and healthy and calves down easily be......
Analysis of the Management and Costs Associated with Rearing Pregnant Dairy Heifers in the UK from C
Good management of the pregnant heifer is crucial to ensure that she is well grown and healthy and calves down easily be......
Dairy heifers only start to produce a return on investment at first calving. The length of the non-productive rearing pe......
Dairy heifers only start to produce a return on investment at first calving. The length of the non-productive rearing pe......
Fine mapping of genomic regions associated with female fertility in Nellore beef cattle based on seq
Background:Impaired fertility in cattle limits the efficiency of livestock production systems.Unraveling the genetic arc......
Evaluation of age, weaning weight, body condition score, and reproductive tract score in pre-selecte
Background: Artificial insemination is a preferred breeding method for beef heifers as it advances the genetic backgroun......
