Concentrações séricas em macrominerais, em cabras lactantes, alimentadas com dietas contendo diferentes concentrações de Lithothamnium calcareum.

Abstract

The objective was to evaluate serum concentrations for calcium, phosphorus and magnesium collected from two different points of blood punctures in dairy goats receiving different levels of Lithothamnium calcareum at diets. The research was conducted at Fazenda NUPEÁRIDO of Health Center and Rural Technology Federal University of Campina Grande, Campus of Patos, Paraíba. Were used eight crossbred dairy goats breeds American Alpine x Saanen x Toggenburg, multiparous with an average production of 2,0 kg day-1 milk, distributed in two Latin squares (4x4), where each square consisted of four animals, four treatments and four periods of 20 days. Treatments were determined by of Lithothamnium calcareum concentrations in the diet, T1 = 0,24%; T2 = 0,61%; T3 = 0,99% and T4 = 1,37% of L. calcareum. Considering the blood samples taken in the jugular vein, the different levels of Lithothamnium calcareum did not promote significant effect (p>0,05) on phosphorus serum concentrations, averaging 4,548 mg dL-1. However, promoted increase (p<0,05) in serum calcium and magnesium. At the averages for the serum collected by venipuncture of the mammary vein was observed significant difference (p<0,05) in calcium levels for fed goats with Lithothamnium calcareum, however the phosphorus and magnesium were not significant between treatments (p>0,05). The use of Lithothamnium calcareum, up 1,367% in the diet does not affect the health of lactating goats, not interfering in the physiological parameters. The Lithothamnium calcareum promoted increase in serum levels of calcium and magnesium in lactating goats.