ANÁLISE DE OPG EM VACAS MESTIÇAS RECEBENDO DIFERENTES NÍVEIS DE TANINO

Abstract

This research objective was to evaluate the nematode eggs incidence in dairy cows, fed different tannin levels, using the technique of eggs per gram of feces (EPG). The experiment was conducted at the Federal University of Paraiba, Campus II, at the Dairy Cattle Sector. The experiment was divided into five periods of 20 days each, with 15 adaptation days and 5 data collection days, totaling 100 days. The roughage / concentrate ratio was 60:40 and the treatments were as follow: control diet without tannin, namely 0 % of tannin, followed by 1.3%, 2.6%, 3.9% and 5.2% respectively in each treatment on dry matter (DM). Was offered 6,180kg concentrate, where 3kg was bran sorghum and as forage was offered corn silage, the feed was offered twice daily at the morning and afternoon. The experimental design was Latin square with 5 cows, 5 periods and 5 treatments. Each period lasted 20 days in which 15 days were used for animals adaptation and diets and 5 days for data and samples collection, totaling 100 days of trial period. The cows were crossbred Dutch/ Zebu with about ± 4 years old and average live weight of ±420 kg. The results for number of eggs per gram of feces (EPG) obtained a low infestation with an average of 56 eggs per gram of feces (EPG), thereby having no statistical difference (p> 0.05). The nematode found during the analysis was the Strongylidae family. It follows that the worming provided animals subjected to treatments directly influenced the incidence of eggs per gram of feces (EPG). For this reason it has not been possible to assess the effectiveness of the treatments tannin.