Nitrogen (N) is the most important nutrient for growth and development of pastures, giving the plant a faster growth rate and greater production (Roma et al. 2012). Despite its proven effectiveness, use of N fertilizer by farmers is limited due to high cost. On the other hand, the legume mixture Estilozantes Campo Grande (80% Stylosanthes capitata + 20% S. macrocephala), capable of fixing atmospheric nitrogen, has become a promising forage plant (Embrapa 2010; Ribeiro et al. 2011). However, there is still a lack of information about its use in association with grasses for animal production. This study aims to measure the performance of livestock grazing Tanzânia grass (Panicum maximum cv. Tanzânia-1) fertilized with nitrogen or grown with Estilozantes Campo Grande (Estilozantes CG).