MORPHOGENIC CHARACTERISTICS OF Urochloa brizantha cv. MARANDÚ UNDER DIFFERENT SOURCES AND DOSES OF NITROGEN IN A CUT REGIME
2018
Xavier, Polliany Santos | Buso, Wilian Henrique Diniz | Alves, Lucas Magalhães | Arriel, Fernando Henrique | Alves, Euquiane Carla
In Brazil the predominant pastures are grasses of the genus Urochloa. Nitrogen is one of the main nutrients to be applied due to the increase of dry matter production and tillering resulting in an increase in productivity. The objective was to evaluate the morphological characteristics and productivity of the species Uroclhoa brizantha cv. Marandú cultivated with varied doses and sources of nitrogen in the regime of cuts. A completely randomized design with 2x4x2 factorial design was conducted, two nitrogen sources (Urea and Novatec Solub 45), four levels of fertilization (0, 75, 150 and 225 mg dm-3 of N) and two cuts with four replications. It evaluated the number of tillers, number of expanded leaves, green biomass and dry biomass. It was concluded that the source of urea, with a dose of 225 mg dm-3, provided better accumulation of dry matter. The second cut was superior to the first one in relation to dry matter production. The number of tillers is higher when evaluated in the second cut. The Novatec Solub 45 source provides increased production of dry biomass and the amount of expanded leaves.
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