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Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Tillering dynamics in massai grass fertilized with nitrogen and grazed by sheep.
Autores:  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.
Data:  2016-11-30
Ano:  2016
Palavras-chave:  Massai grass
Tillering stability index
Tiller survival rate
Ecofiosiologia vegetal
Perfilhamento
Panicum infestum
Capim massai
Massa de forragem
Pastejo
Ovino
Gramínea forrageira
Consorciação de cultura
Plant developmental stages
Sheep
Panicum maximum
Nitrogen fertilizers
Resumo:  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.

2016
Tipo:  Artigo em periódico indexado (ALICE)
Idioma:  Inglês
Identificador:  32250

http://www.alice.cnptia.embrapa.br/handle/doc/1057490

http://ainfo.cnptia.embrapa.br/digital/bitstream/item/150847/1/CNPC-2016-Tillering.pdf
Editor:  Bioscience Journal, v. 32, n. 2, p. 446-454, Mar./Apr. 2016.
Relação:  Embrapa Caprinos e Ovinos - Artigo em periódico indexado (ALICE)
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