E. FERREIRA, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; J. C. DOS SANTOS; O.C. DE OLIVEIRA, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; R. M. TARRÉ, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; R. MACEDO, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; CESAR HERACLIDES BEHLING MIRANDA, CNPGC; BRUNO JOSE RODRIGUES ALVES, CNPAB; SEGUNDO SACRAMENTO U CABALLERO, CNPAB; ROBERT MICHAEL BODDEY, CNPAB.2026-07-07http://hdl.handle.net/123456789/441285The largest quantities of N lost from grazed pastures are in the urine and this loss is a key process in pasture degradation. In this study the recovery of 15N-labelled urea in the soil and by Brachiaria decumbens over a period of 442 days (3 harvests of the grass) was evaluated in two degraded pastures near Campo Grande, MS. In a degraded pasture on a red latosol only 3.0 % was recovered by the grass and 21 % in the soil, total N loss was 76 %. In a similar pasture on a dark red latosol 4.3 % was recovered by the plants and 33.5 % in the soil, total loss was 62 %.1 CD-ROM.openAccessBovinoBrachiaria DecumbensGado NeloreNitrogênioPastagemUrinaUrinePasturesArtigo em anais e proceedings