Palisadegrass effects on N fertilizer dynamic in intercropping systems with corn.

• Autor(a) principal: ALMEIDA, R. E. M. de
• Data de Publicação: 2017
• Outros Autores: OLIVEIRA, S. M. de, LAGO, B. C., P. JUNIOR, C., TRIVELIN, P. C. O., FAVARIN, J. L.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
• Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1078379
• topic: Urochloa spp; Plantio direto; Fertilizante nitrogenado; Milho; Isotopes; No-tillage; Urochloa; Corn; Nutrient use efficiency

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.