Feno do pseudocaule de bananeira associada a diferentes volumosos na dieta de vacas F1 Holandês x Zebu em lactação

Abstract

The objective of this work was to evaluate the association of banana pseudostem hay with different bulks in the diet of F1 Holstein x Zebu cows on the intake and digestibility of nutrients, nitrogen balance, ingestive behavior and milk production. The experiment was distributed in two simultaneous 4x4 latin squares composed of four animals, four treatments and four experimental periods each, with a duration of 72 days. The treatments were defined by the association of pseudostem hay with different sources of bulks: Treatment 1 - sorghum sieving; Treatment 2 - 70% sorghum silage and 30% of banana pseudostem hay; Treatment 3 - 70% of elephant grass and 30% of pseudostem hay; Treatment 4 - 70% of sugarcane and 30% of pseudostem hay. The voluminous: concentrate ratio, in the total dry matter (DM) of the diet, was 75:25. The hay presented higher potential degradability (P <0.01) to the other bulky ones and its association improved the degradation of the fibrous fractions of the diets. The animals fed with sorghum silage presented a 14.45% higher intake (P = 0.01) to the animals fed with hay and elephant grass, which influenced the consumption of other nutrients, which were lower in diets containing elephant grass. The diets containing silage and silage with hay had digestibility of 57.75% higher NDFcp (P <0.01) in the other diets. Cows fed with elephant grass spent more time feeding (P = 0.01). However, diets did not influence milk production (P = 0.47), milk production corrected to 3.5% fat (P=0.22), final weight (P = 0.06), and feed efficiency (P = 0.57), presenting a mean of 14.16 kg/day, 15.94 kg/day, 590 kg and 0.9 kg of milk/kg of DM ingested, respectively. Therefore, the utilization of banana pseudostem hay associated with other bulky can be an alternative to milk production with F1 Holstein x Zebu cows.