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    El horario de complementaci贸n alimenticia modifica la respuesta productiva de cabras lecheras en pastoreo

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    Objective. The objective of this study was to evaluate the effect of the complementation schedule with an integral food in the production and chemical composition of the milk of lactating goats under grazing conditions in northern Mexico. Materials and methods. Twelve adult Saanen goats were assigned equitably and randomly to three treatments: control, morning complementation and evening complementation. It was measured dry matter consumption (DM), live weight (LW), body condition (CC), milk production (PL), chemical composition and performance of milk (protein, lactose and fat). Results. The highest total DM consumption was obtained in goats supplemented in the afternoon (p=0.02), and they were also the ones that produced the highest milk quantity (p<0.0001). The concentrations of protein (p=0.07) and lactose (p=0.10) in milk were not modified due to treatments. In contrast, the fat content in milk of the goats of the control group was higher (p<0.05) than the supplementation treatments. Conclusiones. Complementation in the afternoon improved the productive response of lactating goats in grazing during the dry season in northern Mexico.Objetivo. Evaluar el efecto del horario de complementaci贸n con un alimento integral sobre la producci贸n y composici贸n qu铆mica de la leche de cabras lactantes en condiciones de pastoreo en el norte de M茅xico. Materiales y m茅todos. Doce cabras Saanen adultas se asignaron en forma equitativa y aleatoria a tres tratamientos: testigo, complementaci贸n Ma帽ana y complementaci贸n Tarde. Se midi贸 consumo de materia seca (MS), peso vivo (PV), condici贸n corporal (CC), producci贸n de leche (PL), composici贸n qu铆mica y rendimiento de los componentes de la leche (prote铆na, lactosa y grasa). Resultados. El consumo mayor de MS total se obtuvo en las cabras complementadas por la tarde (p=0.02), y tambi茅n fueron las que produjeron mayor cantidad de leche (p<0.0001). Las concentraciones de prote铆na (p=0.07) y lactosa (p=0.10) en leche no se modificaron por efecto de tratamientos. El contenido de grasa en leche de las cabras del grupo testigo fue mayor (p<0.05) que en los tratamientos con complementaci贸n. Conclusiones. La complementaci贸n por la tarde mejor贸 la respuesta productiva de cabras lactantes en pastoreo durante la 茅poca seca en el norte de M茅xico
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