Título:	Urochloa ruziziensis responses to sources and doses of urea.
Autoria:	LIMA, J. E. S. NASCENTE, A. S. LEANDRO, W. M. SILVEIRA, P. M. da
Afiliação:	JOÃO E. S. LIMA, UFG; ADRIANO STEPHAN NASCENTE, CNPAF; WILSON M. LEANDRO, UFG; PEDRO MARQUES DA SILVEIRA, CNPAF.
Ano de publicação:	2016
Referência:	Revista Brasileira de Engenharia Agrícola e Ambiental, Campina Grande, v. 20, n. 5, p. 401-407, 2016.
Conteúdo:	The use of products that promote reduction of nitrogen (N) losses from the urea fertilizer can contribute to increasing its use efficiency in forage grasses. This study aimed to evaluate the effects of N sources and doses on the growth of Urochloa ruziziensis. The experiment was carried out in the growing season of 2007/2008 in Santo Antônio de Goiás-GO, in a Brazilian Oxisol. A completely randomized block was used, with four replicates in a factorial scheme, corresponding to two N sources (conventional urea and urea with urease inhibitor) and five N doses (0, 50, 100, 200 and 300 kg ha-1), divided into equal applications in five periods (Nov 14 to Dec 13, Dec 14 to Jan 12, Jan 13 to Feb 11 ? rainy season, Mar 24 to Apr 22 and Jul 10 to Aug 08 ? dry season). The effects of the treatments were evaluated for: shoot dry matter, tiller density, total N content in the leaves and relative chlorophyll content. N fertilizer sources did not affect the evaluated variables; however, N fertilization allowed linear increases in all variables with higher values during the rainy period. The relative chlorophyll content in U. ruziziensis had positive correlation with its dry matter productivity.
Thesagro:	Nitrogênio Planta forrageira Uréia
NAL Thesaurus:	Urochloa ruziziensis
Palavras-chave:	Teor de clorofila
ISSN:	1807-1929
Digital Object Identifier:	10.1590/1807-1929/agriambi.v20n5p401-407
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPAF)