2017-09-112017-09-112004-03ROSA, Sérgio Renato Artiaga da; CASTRO, Tomas de Aquino Portes e; OLIVEIRA, Itamar Pereira de. Análise de crescimento em braquiária nos sistemas de plantio solteiro e consórcio com leguminosas. Ciência Animal Brasileira, Goiânia, v. 5, n. 1, p. 9-17, jan./mar. 2004. Disponível em: <https://www.revistas.ufg.br/vet/article/view/318/286>.http://repositorio.bc.ufg.br/handle/ri/12337This research evaluated the effect of the competition in the growth of the forage grass Urochloa brizantha cv Marandu (Brachiaria grass), in the systems of single and mixed planting with the leguminous plant forages Stylosanthes guianensis cv Mineirão (Stilozantes) and Neonotonia wightii cv Common (Perennial Soy). The experiment was carried out in a randomized block desgin with four replications and the treatments were: Brachiaria grass in a single system of planting; Brachiaria grass in mixed planting with the Perennial Soy and Brachiaria grass in mixed planting with the Stilozantes. For the growth analysis they were harvested aleatory plants in the soil level in each plot, and later carried to the laboratory of Vegetable Physiology of EMBRAPA - CNPAF. The rates of growth of the culture (TCC) of Brachiaria grass in the mixed systems of planting were lower in relation to the single system, and Stilozantes contributed in a more expressive way to the reduction of this rate. Considering that maximum TCC (kg.ha-1.dia-1) of Brachiaria grass they were obtained 84 DAE, to leaf area index (IAF) observed that the same date corresponded to the higher IAF, and it demonstrates that the mixed plantation didn’t affect the grass growing cycle, but affected the values obtained for TCC and IAF. It can be concluded that competition exists in the mixed plantation, what interferes in the appraised parameters in different ways.porAcesso AbertoÍndice de área foliarNeonotonia wightiiStylosanthes guianensisTaxa de crescimento da culturaUrochloa brizanthaLeaf area indexRates of growth of the cultureArtigoe- 1809-6891