Título:	Tillering dynamics in massai grass fertilized with nitrogen and grazed by sheep.
Autoria:	LOPES, M. N. CÂNDIDO, M. J. D. POMPEU, R. C. F. F. SILVA, R. G. da MORAIS NETO, L. B. de CARNEIRO, M. S. de S.
Afiliação:	Marcos Neves Lopes, Pós-graduação - Universidade Federal do Ceará (UFC) - Fortaleza, CE, Brasil; Magno José Duarte Cândido, UFC - Fortaleza, CE, Brasil; ROBERTO CLAUDIO FERNANDES F POMPEU, CNPC; Rodrigo Gregório da Silva, Instituto Federal de Educação, Ciência e Tecnologia do Ceará (IFCE) - Limoeiro do Norte, CE, Brasil; Luiz Barreto de Morais Neto, UFC - Fortaleza, CE, Brasil; Maria Socorro de Souza Carneiro, UFC - Fortaleza, CE, Brasil.
Ano de publicação:	2016
Referência:	Bioscience Journal, v. 32, n. 2, p. 446-454, Mar./Apr. 2016.
Conteúdo:	To evaluate the tillering dynamics of massai grass under rotational sheep stocking and fertilized with nitrogen (control - 0; 400; 800 and 1200 kg ha-1 year-1), this study was carried out, in a completely randomized design with repeated measures over time. The mob-grazing technique was applied to perform the grazing by employing groups of animals for rapid defoliation. The tiller appearance, survival and mortality rates, tiller biomass, and green/dead tillers ratio, have presented increase responses to nitrogen levels, with the three rates and the tiller biomass varying between evaluation periods. There was a quadratic response for the tiller flowering rate, population density of vegetative and reproductive tillers, reaching maximum values (0.051 tiller 100 tiller-1 day-1; 4,818 and 35 tillers m-2, respectively) under the nitrogen levels of 613.5; 993.5 and 623.9 kg ha-1 year-1, respectively. For the tiller flowering rate and population density of reproductive tillers, it was verified a fluctuation between periods. The nitrogen fertilization promotes positive changes in tillering dynamics of massai grass, allowing the use of up to 800 kg ha-1 year-1 for maintaining the pasture stability. The tillering demography of the forage had varied little between assessment periods.
Thesagro:	Pastejo Ovino Gramínea forrageira Consorciação de cultura Panicum Maximum
NAL Thesaurus:	Sheep Nitrogen fertilizers
Palavras-chave:	Massai grass Tillering stability index Tiller survival rate Ecofiosiologia vegetal Perfilhamento Panicum infestum Capim massai Massa de forragem Plant developmental stages
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPC)