Cinética ruminal in vitro de silagens de milho com uso de aditivo enzimático-microbiano

Abstract

The aim was to evaluate the parameters related to the in vitroruminal degradation kinetics of corn silage inoculated with microbial-enzymatic additive. The maize crop was harvested at two stages of developmentand the silages will be made in laboratory mini-silos. The treatments will be composed of five levels of inoculant (0,500, 1000, 1500 and 2000 g/TMV) added to the material at the time of ensiling. The experimental design was completely randomized design, in a 2x5 factorial scheme (two harvest times and five inoculation levels) with four replications per treatment. The analyzes were carried out in the Laboratory of Bromatology and Animal Nutrition at Universidade Tecnológica Federal do Paraná campus Dois Vizinhos. The latency time, degradation rate and volume of gas produced in a period of 144 hours of in vitro in cubation in the different reatments was estimated. Pearson's correlation analysis will be performed between in vitro degradation kinetics parameters with nutritional components: dry matter, organic matter, hemicellulose cellulose, lignin and crude protein. Additive use positively affected the degradation rate of corn silage when the dry matter content was higher.