The present work was developed during the growing seasons of 1996/97, 1997/98, 1998/99 and 1999/00 at Ribeirão Preto, Tietê, Guaíra, Campinas and Ilha Solteira, State of São Paulo, Brazil. The experimental design was the completely casualized blocks, using the factorial arrangement with twelve treatments (3 x 2 x 2) and four replications. The objective of this work was to study plant density (6; 10 and 14 plants/m); nitrogen levels at broadcasting (40 and 60 kg.ha-1 of N/ha) and types of growth regulator application (single application at flowering or splitting in four times, since the thinning). The split application conduced to lower height of plants and greater weight of bolls when compared to the single application of the growth regulator. The application of the highest level of N, increased the leaves nitrogen content in and cotton yield, and reduced the lint percentage. increasing plant density from 6 to 10 and 14 plants/m, reduced lint porcentage and bolls weight.
Gossypium hirsutum; growt regulator; nitrogen; plant density
