Glicerina bruta na dieta de bovinos de corte confinados: efeito sobre o hemograma / Crude glycerin on feedlot beef cattle diets: effect on hemogram

RESUMO

Objetivou-se com este estudo avaliar o hemograma de bovinos alimentados com glicerina bruta. Trinta novilhos da rno leucograma destes animais.

ABSTRACT

The aim of this study was to evaluate the hemogram in cattle fed crude glycerin. 30 Nellore steers, were used for blood sampling, which were done each 28 days. The animals were confined for 103 days and were fed with five diets containing 0, 7.5, 15, 22.5 and 30% crude glycerin based on dry matter, formulated in a forageconcentrate ratio of 3070. Corn silage was used as forage and the concentrate was composed by corn grain, soybean hulls, sunflower meal, glycerin, limestone, dicalcium phosphate and salt. The experimental design was a randomized block with five treatments. Orthogonal contrasts were used to determine the linear, quadratic, cubic effects and gliceryn treatments × the control one. There was no treatment effect (P>0,05) on blood concentrations of erythrocytes, hematocrit, basophils, eosinophils, band neutrophils and lymphocytes, but were linearly effect on the concentrations of platelets, hemoglobin and monocytes (P=0.009, P=0.001 and P=0.043, respectivelly), and cubic effect on the concentrations of total leukocytes and segmented neutrophils (P=0.008 and P=0.004, respectivelly). Diets for beef cattle, with forageconcentrate ratio of 3070 added with crude glycerin promote changes in the erytrhogram and leucogram of these animals.