Valor nutricional de silagens de milho com uso de aditivo enzimático e microbiano

Abstract

Silage is a way to avoid food shortages in times of reduced forage supply. Corn is the most used crop for this practice, as it is a very energetic and accessible source. The objective of this work was to evaluate the nutritional value of corn silages using an enzymatic and microbial additive in two harvest periods. The treatments consisted of different inoculant doses (0, 500, 1000, 1500 and 2000 g/t MV) applied to the material at the time of ensiling. The experimental design used was completely randomized in a 5x2 factorial scheme (five inoculant doses and two cutting times), with four replications per treatment. The experimental silages were made in laboratory mini silos. The dry matter, mineral matter, crude protein, neutral detergent fiber, acid detergent fiber, soluble sugars, starch and lignin contents of the experimental silages were determined. Changes in DM, MM and CP values were observed between the silages made on different dates. There was an interaction between dates and doses of enzymatic and microbial additive, linearly decreasing the lignin contents on both cutting dates and increasing starch from the silages produced on 02/05/2019 until the addition of 1000g/t MV, with a linear decrease in the starch content proportional to the addition of the doses of additives in the silage on 05/12/2019.