Características produtivas, estruturais e bromatológicas dos capins Tifton 85 e Piat？ e do feij？o-guandu cv. Super N, em cultivo singular ou em associa？？o

this trial aimed at evaluating characteristics as: production, structural and nutritional requirements of tifton 85 and piat？ grasses and pigeonpea in single or intercropped tillage, with and without nitrogen application. the experimental plot in randomized blocks with plots subdivided through time, with 7 treatments in the main plots and three periods of evaluation on subplots with four replications. the studied treatments were: cajanus cajan cv. super n (pigeonpea), brachiaria brizantha cv. single piat？ without application of nitrogen (n); b. brizantha cv. piat？ in association with pigeonpea; b. brizantha cv. single piat？ with application of n (150kg ha-1); cynodon sp. tifton 85 in a single crop without application of n; tifton 85 in association with pigeonpea and tifton 85 plus an application of n (150kg ha-1) and three cycles of evaluations. the association of tifton 85 and piat？ grasses with pigeonpea provided forage production like nitrogen fertilizer and increase crude protein content and a reduction on neutral detergent fiber contents. tifton grass was less tolerant to shading from pigeonpea.