Resumen

LAZZARINI¹, B et al. Evolución de la suplementación, el consumo de pastura y la producción de leche en sistemas lecheros de argentinaProducción de leche y consumo de alimentos. FAVE. Secc. Cienc. agrar. [online]. 2014, vol.13, n.2. ISSN 1666-7719.

SUMMARY Evolution of supplements and pasture feeding and milk production on dairy farms of Argentina. Individual milk yield and pasture and supplement consumption are factors related to dairy farm's profitability. To investigate the evolution of milk production and supplement and pasture consumption, data of 40 dairy farms of the central region of Santa Fe were analyzed from 2004-2012. Results showed a 65% increase in the amount of consumed supplements per cow, allowing a moderate increase in the stocking rate (35%), and an increase in individual milk production (9,5%). However, pasture consumption per cow and per hectare showed a decrease for the same period. Some causes that would explain the low response in milk production per cow with high addition of supplements could be: high substitution rate, low quality of supplements, and lack of adequate infrastructure on dairy farms.

Palabras clave : Supplements; Milk production; Dairy systems; Substitution rate.

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