Cinética ruminal in vitro e inclusão do farelo de soja expeller na dieta de vacas holandesas

Abstract

The expeller soybean bran can be utilized like a proteic supplement at dairy cows. However, this bran has not the effects elucided of this in ruminal microbiota and what is the level that has direct effect on production and quality milk. So, the aim was to evaluate the in vitro ruminal kinetic of the conventional soybean meal and of protected soybean meal, and the impact of the inclusion of the both in milk's quality of Holstein cows. Some datas will be collect at field in a particular farm, in Dois Vizinhos, Paraná. Will be utilize 20 holstein cows, separate in two treatments, the first treatment will be with the inclusion of the protected soybean meal and the other treatment with conventional soybean meal. Will be evaluate the dairy production through of weighning,the samples will be gathering at days 0, 15, 30 e 45 days for determination of protein, fat, ureic nitrogen, lactose and solids. The kinetic will be realize at Laboratório de Parasitologia from the institution. The measurements of gas pressure and volume will be performed after 1, 2, 3, 6, 8, 10, 12, 16, 20, 24, 30, 36, 48 and 72 hours. Then, in the results found will apply a mathematical model to estimate the ruminal kinetics in vitro. The dates found in this study will be subjected to analysis of variance, through ANOVA and the means will be compared by the F test, by the SAS program. For the results The field no variable differed significantly, showing no difference the inclusion of soybean meal expeller in the diet of Holstein cows. The results referring to the kinetics for conventional soybean meal and soybean meal expeller for the respective variables, VF1, K1, Vf2, K2, L, and the values found were, 13.2045; 0.2506; 10.5911; 0.0318; 4.4108 for the conventional bran, already for the Expeller Bran was 15.2635; 0.1724; 6.2376; 0.0317; 13.1548, respectively. The soybean meal expeller has a lower degradation compared to the other bran. There were no significant differences for milk production and solids production.