Desempenho de vacas leiteiras alimentadas com ingredientes orgânicos e convencionais em sistema orgânico

Abstract

Aimed to analyze the effect of diet based on conventional alternative foods from a quantitative and qualitative performance of dairy cows in brown Swiss breed in an organic system. The study was conducted in the mesoregion of Paraiba backcountry. An average of 107 cows in different stages of lactation were used in the period from September 2013 to June 2014. Diets based on organic and conventional ingredients and other basis of conventional foods (byproduct) were offered. The supply of concentrate varied according to the proportions permitted by the organic production system. Physicochemical and milk production parameters were analyzed. There was no significance in milk production (P>0.05) while milk qualitaty variables showed significant differences (P<0.05) in fat and density. It was concluded that using diets based only conventional ingredients and reduction of the amount of concentrate not affect the daily milk production, however, increase the fat content and reduces the density of the same, which can be advantageous because the higher yield milk derivatives.