The present study was carried out from selected areas at Rajshahi district to evaluate the reproductive performance of dairy cows in relation to breed/genotype, age, parity, body weight and body condition. A total of 500 cows selected and data were collected directly from the dairy farms owner by using pre-tested questionnaires during the period from September 2013 to December 2014. The average reproductive performance (RP) were recorded as age at puberty (AP) 26.42±0.22 m, age at first calving (AFC) 35.48±0.22 m, post-partum heat period (PPHP) 121.85±3.48 days, service per conception (S/C) 1.93±0.04, days open (DO) 136.80±3.57 days and calving interval (CI) 401.04±3.94 days. Genotype had significant effect (P0.05). Middle age groups of cows had shown better RP than others groups. Parities of cows had significant effect (P300 kg BW groups. Body condition score had significant effect (P0.05) on all RP. Good body condition score (BCS) had excellent RP.
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机译：目前的研究是从Rajshahi区的选定地区进行的，以评估乳制品奶牛的生殖性能与品种/基因型，年龄，阶段，体重和体重。在2013年9月至2014年12月期间，使用预先测试的调查问卷直接从奶牛场所有者收集500次奶牛和数据。平均生殖表现（RP）被记录为青春期（AP）26.42±26.42± 0.22米，第一次加工（AFC）的年龄（AFC）35.48±0.22米，Part-Partum热量时期（PPHP）121.85±3.48天，每次概念服务（S / C）1.93±0.04，天开（DO）136.80±3.57天和Calping间隔（CI）401.04±3.94天。基因型具有显着影响（p0.05）。中年奶牛组比其他群体显示出更好的RP。奶牛的疗法有显着影响（p300 kg bw组。身体状况得分在所有rp上有显着影响（p <0.05）。良好的身体状况得分（BCS）具有优异的RP。
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