Sources of supplemental zinc for adult cats / Fontes suplementares de zinco para gatos adultos

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The aim of this research was to evaluate different sources of supplemental zinc for adult cats. This work was conduced in the Department of Zootecnia of the Federal University of Lavras (UFLA). Using 24 adult cats, male and female, no defined race, with weight average of 3,56 kg along 56 days. Analyzed variables were zinc apparent absorption based in the plasmatic curve, coefficients of zinc retention based in the fecal and urinary excretion, coefficients of retention of zinc, zinc deposition in the coat and the skin and histology of the skin. A randomized experimental design with 4 treatments and 6 repetitions was conduced to study all parameters in exception the zinc retention (3 treatments, 6 repetitions; 18 experimental units) and biopsies of skin (4 treatments, 4 repetitions; 16 experimental units). For zinc concentrations in plasma the delineation followed the same design however in subdivided parcel along the time. The experimental treatments consisted of T1: commercial ration + 30 mg of Zn (chelated); T2: commercial ration + 30 mg of Zn (zinc sulphate); T3: commercial ration + 30 mg of Zn (zinc oxide) and T4: control treatment (commercial ration without supplemental zinc). There were not significant effects of the different levels of zinc in digestibility, consumption and fecal excretion (P>0,05). In relation of fecal excretion the chelated zinc and oxide zinc showed the low results (P<0,05). Among treatments zinc oxide showed the minor urinary excretion (P<0,05) and other treatments do not present difference among themselves (P>0,05), and zinc oxide also showed the bigger retention in the organism in relation to the other zinc sources (P<0,05). For the zinc in the skin the chelated was superior to the other treatments (P>0,05) and similar to zinc sulphate when analyzed the zinc concentration in the coat. For biopsies of skin there was not difference among treatments. In conclusion the chelated and inorganic sources showed different sites of absorption and served distinct tissues in organism.

ASSUNTO(S)

dose therapeutical source supllemental zinc gatos adultos fontes suplementares de zinco dose terapÃutica zootecnia cats adult

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