Características morfogênicas, produtivas e bromatológicas do capim-buffel cv. Áridus submetido a fontes de nitrogênio

Abstract

The morphogenic, structural, productive and bromatological characteristics of buffel grass cv. Aridus subjected to nitrogen sources. A randomized complete block design with six replications and four treatments (absence of nitrogen fertilization, nitrogen fertilization in the form of urea, nitrogen fertilization with encapsulated urea and nitrogen fertilization with ammonium sulfate). 180 kg ha-1 of N was applied in 3 applications of 60 kg ha-1 of N every 30 days. The rates of pseudocoelom elongation and foliar senescence were higher when nitrogen was applied in the form of ammonium sulphate and urea, respectively. Nitrogen fertilization provided increases in forage canopy height, with higher values observed when nitrogen was applied in the form of encapsulated urea and ammonium sulfate. Nitrogen fertilization, regardless of the source used, increased yields of total dry matter, leaf dry matter and pseudocolus dry matter. The dry matter content was higher for the treatment with absence of nitrogen fertilization. In the treatments where the nitrogen fertilization was carried out, the lowest cost per kilo of dry matter produced was observed with the application of urea.