Dataset for study: Association between production and reproduction parameters based on parity and breed of dairy cows in the Czech Republic

Milk production and the efficiency of dairy cow breeding are significantly influenced by reproductive factors. The purpose of our research was to examine the relationships between selected milk production and reproductive parameters. We evaluated 659 dairy cows, including 444 purebreds from the Czech Fleckvieh and Holstein breeds and 215 crossbreds.
The evaluation included data from January to December 2018. Data on average milk yield per lactation (MY, kg), average fat in milk per lactation (F, kg), average protein in milk per lactation (P, kg), average lactose in milk per lactation (L, kg), average percentage of fat in milk (F%), average percentage of protein in milk (P%), and average percentage of lactose in milk (L%) were measured using the Pulsameter 2 (certified by ICAR, Labor- und Messgeräte GmbH, Germany).
The dataset was further supplemented with data on SP (d), CalvInt (d), and summary selection indices for the Czech Fleckvieh (Genetic Total Merit Index – GZW) and Holstein breed index (Selection Index Holstein – SIH) from the performance control database maintained by the Czech Moravian Breeders Corporation (CˇMSCH;Hradištko, Czech Republic).
This dataset provides key information on dairy cows, including individual IDs, breeding details, calving dates, and lactation periods. It tracks cows' reproductive history (parity and calving intervals) and farm location (Farm ID and Stable ID). The dataset also includes performance metrics (potentially related to breeding and health) and detailed records of milk production, including quantity and content analysis for fat, protein, and lactose.
The dataset could be used for various purposes in the field of dairy cattle research, as it contains valuable information about reproduction and production of many dairy cows over an extended period.

奶牛产奶性能与育种效率显著受繁殖相关因素影响。本研究旨在探究选定的产奶性能与繁殖参数之间的关联。本次研究共评估了659头奶牛，其中包括444头纯种奶牛（分别来自捷克弗莱维赫（Czech Fleckvieh）与荷斯坦（Holstein）品种）以及215头杂交奶牛。
本次评估的数据采集周期为2018年1月至12月。研究所涉及的产奶相关参数包括：平均泌乳产奶量（MY，kg）、平均泌乳期乳脂产量（F，kg）、平均泌乳期乳蛋白产量（P，kg）、平均泌乳期乳糖产量（L，kg）、平均乳脂率（F%）、平均乳蛋白率（P%）及平均乳糖率（L%），所有参数均采用获国际动物记录委员会（International Committee for Animal Recording，ICAR）与德国Labor- und Messgeräte GmbH认证的Pulsameter 2设备完成测定。
本数据集还补充了来自捷克摩拉维亚育种公司（ČMSCH；捷克共和国赫拉迪什特科）维护的性能管控数据库中的相关数据，包括：配种间隔（Service Period，SP，d）、产犊间隔（Calving Interval，CalvInt，d），以及捷克弗莱维赫品种的综合选择指数——遗传总价值指数（Genetic Total Merit Index，GZW）与荷斯坦品种选择指数（Selection Index Holstein，SIH）。
本数据集涵盖奶牛的核心信息，包括个体编号、育种详情、产犊日期及泌乳周期。其追踪记录了奶牛的繁殖历史（胎次与产犊间隔）以及养殖场信息（牧场编号与牛舍编号）。此外，数据集还包含与育种及健康潜在相关的性能指标，以及产奶量与乳成分（乳脂、乳蛋白、乳糖）的详细检测记录。
由于该数据集包含大量奶牛在较长周期内的繁殖与产奶相关珍贵数据，因此可应用于奶牛养殖研究领域的多种科研场景。