Composição bromatológica de plantas de milho com potencial de ensilagem em função de diferentes fontes nitrogenadas e sistemas de cultivo
Data
Autor(es)
Orientado(es)
Título da Revista
ISSN da Revista
Título de Volume
Editor
Abstract
Corn is one of the most important socioeconomic cereals for the country, being the most used crop for silage production by milk and meat producers. Silage is a way of reducing production costs, constituting the roughage used in pasture seasonality. The yield and final quality of corn silage is directly related to the nutritional status of the plants and the nutrient content required by the crop, being the nitrogen considered the most important. In this context, the present work aimed to evaluate the bromatological quality and productivity of corn silage as a function of different nitrogen sources used in the cover fertilization of safrinha corn cultivated under no-tillage and conventional tillage. The experiment was carried out in a randomized block design in a 7x2 factorial scheme, with the control and 6 nitrogen sources (pearly urea, urease inhibitor urea (NBPT), urea containing copper and boron, urea containing sulfur and polymer, ammonium nitrate). and ammonium sulfate) and 2 tillage systems (no tillage and conventional tillage), with 3 replications, totaling 42 experimental plots. All fertilizers were applied at a rate of 150 kg ha-1 of N in coverage and the control treatment (without application of N in coverage). The evaluated variables were yield, dry matter (DM), mineral matter (MM), crude protein (CP), acid detergent fiber (ADF), neutral detergent fiber (NDF) and hemicellulose (HEM) of corn silage. Data were subjected to analysis of variance and the means grouped using the Scott-Knott test at 5% probability. The use of different nitrogen sources in the cover crop fertilization influenced the quality of silage for NDF, ADF and hemicellulose percentage, however, did not affect corn silage yield.
