Desenvolvimento de um processamento de zinco orgânico para suplementação na dieta de caprinos.

Abstract

The objective of this study was to develop products to allow larger biodisponibility of organic minerals for ruminant, like this, two nanoparticles systems were proposed, in way to guarantee enough sizes so that they were absorbed. The components were: water, honey of bees, polyethylene glycol 6000, talc and soy oil and in the chelation, bacterial protein and zinc oxide. The suspension was prepared without use of buffer in one of systems and in the another it was made a reduction of H+ ion through a buffer solution. It was necessary to develop a dryer by pulverization to dry the proposed formulations. The amount of chelat zinc was determined by chelatometry in agreement. Afterwards of this test, it was determined the warranty level of inorganic zinc and of organic zinc. The product formulated without buffer presented 89% of chelation, being obtained a unstable product; already the organic zinc processed with buffer presented 46% of chelat zinc stable. It can be that there was a ratio of chelation mineral: protein of 1:3. To evaluation of the biodisponibility of organic and inorganic zinc, twenty-four crossbreeds goats (½ saanen and ½ Boer), twelve males and twelve females, powder-weaned, with medium body weight of 14 ± 3.5 kg, were randomly assigned according to a completely random design with four treatments and six replications. The treatments consisted in: T1 PBA supplemented with 20mg of protein source and T2 ZnO supplemented with 8mg of inorganic zinc, T3 ZnPBA9 and T4 ZnTBA10 supplemented with 8mg of organic Zn where they were synthesized in pH9 and pH10, respectively. In the biological rehearsal, it was observed that the supplementation of zinc in organic form (chelat) in pH = 10 contributed to an increase of 778% in relation to blood zinc in inorganic form. For the performance variables there weren’t significant differences. The chelat increased the blood levels of zinc, and it can contribute to reduction in the tenor of dietary zinc and, consequently, of ecological impact provoked by the excretion of the animals.