Efeito de diferentes volumosos associados ao feno do pseudocaule da bananeira sobre a qualidade do queijo e do leite de vacas F1 holandês/zebu

Abstract

The use of agroindustrial residues can be a strategy to reduce feed costs and environmental impact. However, the use of residues in dairy cows feeding should be evaluated in relation to milk production and quality. The objective of this study was to evaluate the association of different roughages with banana pseudostem hay on the chemical composition of milk and cheese and the fatty acid profile of F1 Holstein x Zebu cows. Two simultaneous 4 x 4 Latin squares were used, with 8 cows and 4 experimental diets: Treatment 1 - only sorghum silage as roughage; Treatment 2 –70% sorghum silage and 30% of banana pseudostem hay; Treatment 3 –70% elephant grass cv. Purple and 30% of banana pseudostem hay; Treatment 4 - 70% of sugar cane and 30% of banana pseudostem hay. In the chemical composition of cheese and milk, there was no difference between diets except for milk urea nitrogen which was higher with the grass and hay diet. This diet resulted in a lower percentage of saturated fatty acids and a higher percentage of monounsaturated fatty acids, with increased concentrations of vaccine, oleic and linoleic conjugated fatty acids in milk, contributing to the improvement of some nutritional evaluation indexes of milk lipid fraction. The hay of banana pseudostem associated or not with different roughages did not influence the chemical composition of cheese and milk of F1 Holstein / Zebu cows.