Body Condition Score and Milk Production on Conception Rate of Cows under a Small-Scale Dairy System

Animals

卷:9

Eliab Estrada-Cortés¹  LuisJavier Montiel-Olguín²  Sergio Gómez-Rosales²  FelipeJ. Ruiz-López²  Miguel Mellado³  HectorRaymundo Vera-Avila⁴  JuanaElizabeth Elton-Puente⁴ 

[1] Campo Experimental Centro Altos de Jalisco-INIFAP, Av. Biodiversidad 2470. Tepatitlán de Morelos, Jalisco 47600, Mexico;

[2] Centro Nacional de Investigación Disciplinaria en Fisiología y Mejoramiento Animal-INIFAP, km.1 Carretera a Colón, Ajuchitlán, Colón, Querétaro 76280, Mexico;

[3] Departamento de Nutrición Animal, Universidad Autónoma Agraria Antonio Narro, Calzada Antonio Narro 1923, Buenavista, Saltillo, Coahuila 25315, Mexico;

[4] Facultad de Ciencias Naturales, Universidad Autónoma de Querétaro, Av. de las Ciencias s/n, Santiago de Querétaro, Querétaro 76230, Mexico;

关键词: reproductive performance;    dairy cattle;    lactation number;    fertility;    holstein;   

DOI  :  10.3390/ani9100800

来源: DOAJ

【 摘 要 】

Management and production characteristics impact conception rate to first service (CR1S) in small-scale dairy farms, but the impact of body condition score (BCS) and milk production levels on cows’ fertility is unknown. Our objective is to determine the effect of BCS and milk production on CR1S in small-scale dairy farms of western Mexico. Logistic regression models are used to determine the effect of BCS (at calving and first service), 60-d and 305-d milk production, protein and fat production, lactation number, and days at first service on CR1S. BCS at calving does not affect CR1S in cows with three or more lactations (39.5%; p > 0.1). However, first-lactation cows with BCS < 3.0 at calving and second lactation cows with BCS ≤ 2.5 at calving have higher CR1S (63.2 and 67.9%, respectively; p < 0.1). This result is perhaps due to reduced milk production, which leads to lower metabolic stress. BCS ≤ 2.5 at calving is associated (p < 0.05) with a reduced milk yield, explaining partially the observed higher CR1S in these groups. Cows with BCS ≤ 2.5 at first service in the higher quartile of 60-d milk production (≥ 28kg/day) show lower CR1S (23.9 and 51.1%, respectively; p < 0.01). In conclusion, BCS at calving and at first service, 60-d milk production, and lactation number are factors associated with CR1S.

【 授权许可】

Unknown