Resposta do Capim Mombaça na Fase de Estabelecimento a Fontes de Nitrogênio em Neossolo Quartzarênico Órtico.

Abstract

The objective of this study was to evaluate the response of the application of nitrogen on the grass of forage yield Mombaça and its nutritional quality, subjected to two sources of nitrogen fertilizers and four doses of nitrogen in the soil and climate conditions of the city of Araguaína, Tocantins. The experimental design was a complete randomized block design with three replications, with treatments arranged in a factorial arrangement of 2 x 4, consisting of two sources of nitrogen (BUN and Novatec N-max) and four nitrogen rates (20, 40, 60 and 80 kg N / ha) plus an additional treatment by repetition (zero dose N). They were analyzed Dry Mass Production of fodder (MSF); and crude protein (CP). Analyzed variables were subjected to analysis of variance by PROC GLM of the statistical program Statistical Analysis System (SAS, 2007). MSF productivity of Mombasa grass increased linearly with increasing N rates applied to the two sources of nitrogen used. There was a significant difference in productivity between sources, especially the Novatec source N-max. It was found that the increase was 51% in average productivity with the implementation of this source. The sources and doses of nitrogen did not provide significant influence (P> 0.05) on the crude protein (CP) in the dry matter of the leaf blade of Mombasa grass, with an average of 8.03%.