Resumen

GOMEZ URREGO, Juan Miguel; CORREA LONDONO, Guillermo  y  BARAHONA ROSALES, Rolando. Evaluation of the Agaricus bisporus Spent Compost as Feed of Dairy Cows in Mid Lactation. Rev. Fac. Nac. Agron. Medellín [online]. 2014, vol.67, n.2, pp.7331-7343. ISSN 0304-2847.  https://doi.org/10.15446/rfnam.v67n2.44175.

This study evaluated the potential of the growth bed of the mushroom Agaricus bisporus as a feed for mid lactation dairy cows. We replaced 10% of commercial concentrate with the residue (peat removed) and assessed its effect on milk production, nutritional balance of the cows and final cost of the concentrate. The experimental design was a cross-over or change-over with repeated measurements. Each experimental period lasted 14 days. Two groups of animals, one with four Holstein cows and one with four crossbred Holstein x BON cows were used. On average, cows had 117 ± 18.6 days in milk and 2.6 ± 0.9 lactations, weighed 529.5 ± 52.9 kg and produced 15.42 ± 2.6 L milk daily. The experimental treatment reduced the diet total digestible nutrients content by 2%. There were no statistical differences in the nutritional balance of the cows in response to the experimental treatment. There was also no statistical difference in milk production (14.4 L) and compositional quality of milk (fat: 3.86%, protein: 3.5%, fat to protein ratio: 1.11). The cost analysis showed that the inclusion in the concentrate of 10% of the residue of B. bisporus was obtained a reduction in feed cost of $403 colombian pesos /cow/day.

Palabras clave : Nutritional balance; voluntary intake; Feeding costs; milk production.

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