Evaluación de la composición de la leche de cabra (Capra aegagrus hircus) alimentada con dietas a base de forrajes arbóreos

Abstract

The aim of the present research was to determine the voluntary intake, physicochemical composition and milk production of goats fed with diets based on tree forages such as Acacia black (Acacia melanoxylon) and Retama (Senna multiglandulosa). 4 goats were used during pregnancy (2 primiparous and 2 multiparous). The work was carried out in the Facultad de Ciencias Agropecuarias - UTA. The voluntary intake was carried out by the direct method (feed offered - feed rejected in 24 hours) every 15 days 3 consecutive days. Milk yield was evaluated every 15 days for 3 consecutive days in milking in the morning and in the afternoon. The analysis of the physicochemical composition of the milk obtained was performed using an automatic milk analyzer: LACTOSCAN, where samples of 0.5 kg per treatment were used. The digestibility of the diets was performed in vitro. Voluntary intake of DM and digestible DM no showed differences between treatments (P> 0.05). The digestibility of DM was higher (P = 0.0003) in the treatment including broom (S.multiglandulosa) (T3; 74.2%). Regarding milk yield, it was higher (P = 0.0012) in the treatment including Acacia (T2) with a production of 1.5 L/animal/day. The chemical composition of milk in analytes such as fat, non-fat solids, protein, minerals, lactose, density was not reflected significant differences (P> 0.05) between the evaluated treatments. It was concluded that by including A.melanoxylon in the diet of dairy goats it increases milk production.