Características forrageiras do triticale submetido a diferentes fontes de adubação nitrogenada

Abstract

The objective of this work was to evaluate the forage production of IPR Aimoré triticale under different doses and sources of nitrogen topdressing. The experiment was carried out in a greenhouse at the Federal University of Fronteira Sul, located in Laranjeiras do Sul. The design used was a randomized block design with five treatments containing six replications per treatment, totaling 30 samples. The treatments used were 0, 100, 200, 300 Kg N / ha, by chemical fertilization with urea (45% nitrogen), and organic fertilization 300 Kg N / ha (commercial pelleted poultry litter). It was observed that the organic fertilization presented higher efficiency in the variables (total MV, total DM, leaf MS and stem MS) when compared with the chemical fertilizer and the control. No difference was observed in the treatments of chemical fertilization, except for the chlorophyll variable, noting only a higher average in the treatment close to the recommended dosage for the crop. For the crude protein (CP) variable, there were no differences between treatments, being the first cut higher than the indicated value (7%) to be considered a good forage, and in the second cut presenting a lower than the indicated average. It can be concluded that when properly managed poultry litter is a great alternative for the farmer, due to the very low cost and benefits of increasing the forage characteristics of the crop, and that the high dosages of nitrogen through the urea did not increase the forage production. Dosages close to the recommended can be used for greater efficiency and lower cost to the farmer.