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Ciência Rural

On-line version ISSN 1678-4596

Cienc. Rural vol.46 no.9 Santa Maria Aug. 2016


Press Release

Researchers test the influence of nitrogen application in the pre-flowering of Brachiaria brizantha B4

Jaqueline Rosemeire Verzignassi1  * 

1Empresa Brasileira de Pesquisa Agropecuária, Embrapa Gado de Corte. Avenida Rádio Maia, 830. Vila Popular. 79106-550 - Campo Grande, MS - Brasil - Caixa-postal: 154 Telefone: (67) 33682178 Ramal: 2015 Fax: (67) 33682150

Researchers from Embrapa Gado de Corte, in Mato Grosso do Sul State, and the Instituto Federal de Goiás, in Goiás, Brazil, showed that the use of high doses of nitrogen 150 kg ha-1 in the pre-flowering of Brachiaria brizantha genotype B4 consequently brought the increase in numbness and reduction in seed quality. The study was published in Ciência Rural journal, v.46, n.9, September 2016.

The study aimed to evaluate aspects of reproductive phenology, yield components and seed quality of Brachia brizantha B4 according to levels of nitrogen applied in the pre-flowering of the plant. For this, the researchers conducted an experiment at Embrapa, with first year free growing plants. They applied urea in pre-flowering of these plants at dosages of 0, 25, 50, 75, 100, 125 and 150 kg ha-1.

The doses of nitrogen influenced several factors such as the number of inflorescences, the percentage of dry matter, the dry biomass, productivity of seeds, germination, germination speed index and the weight of a thousand seeds. Higher doses caused the intensification of numbness and reduction in seed quality.

According to the researcher Jacqueline Rosemeire Verzignassi, this research breaks new ground by bringing data on knowledge of reproductive phenology and management that influence the production of tropical pasture seed, as there is a shortage of studies on the subject. "One of the most important demands of the productive sector related to tropical forage seed technology is precisely this phenological knowledge, which leads to the definition of management strategies to increase productivity and seed production quality," she says.

Researcher: Jaqueline Rosemeire Verzignassi

Creative Commons License This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.