Data/hora: 23/09/2024 23:51:15

Biblioteca(s): 	Embrapa Arroz e Feijão.	
Data corrente: 	06/04/2016	
Data da última atualização: 	03/03/2017	
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.	
Título: 	Urochloa ruziziensis responses to sources and doses of urea.	
Ano de publicação: 	2016	
Fonte/Imprenta: 	Revista Brasileira de Engenharia Agrícola e Ambiental, Campina Grande, v. 20, n. 5, p. 401-407, 2016.	
ISSN: 	1807-1929	
DOI: 	10.1590/1807-1929/agriambi.v20n5p401-407	
Idioma: 	Inglês	
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.	
Palavras-Chave: 	Teor de clorofila.	
Thesagro: 	Nitrogênio; Planta forrageira; Uréia.	
Thesaurus Nal: 	Urochloa ruziziensis.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/142099/1/CNPAF-2016-pms.pdf	
Registro original: 	Embrapa Arroz e Feijão (CNPAF)	
Exemplares: 	CNPAF - (34126-1) - UPC - AP - DD - 2016 -  - 2016 - DIS