Autoria: ALMEIDA, R. E. M. de; OLIVEIRA, S. M. de; LAGO, B. C.; P. JUNIOR, C.; TRIVELIN, P. C. O.; FAVARIN, J. L.

Resumo: Corn grain yield, nitrogen (N) fertilizer efficiency and distribution to corn alone and three forms of corn and palisadegrass (Urochloa spp.) intercropping implantation was investigated. A field experiment with 15N labeling fertilizer was performed in randomized block design. No form of palisadegrass intercropping implantation affected corn grain yield, total N accumulation and N use efficiency (NUE), which were 8.7 t ha-1, 205 kg ha-1 and 37% respectively. The palisadegrass produced on average 1.9 t of dry mass, absorbing a maximum of 6 kg ha-1 or 5.5% of N fertilizer during corn growing. Furthermore, the palisadegrass did not affect N fertilizer distribution in soil-plant system, in which 28.2% was recovered in the soil and 40.4% in the plants (corn + palisadegrass). The results show that for the three intercropping implantation methods the palisadegrass did not compete with corn for N fertilizer.

Ano de publicação: 2017

Tipo de publicação: Artigo de periódico

Unidade: Embrapa Pesca e Aquicultura

Palavras-chave: Corn, Fertilizante nitrogenado, Isotopes, Milho, No-tillage, Nutrient use efficiency, Plantio direto, Urochloa, Urochloa spp