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Provedor de dados:  Ciência Rural
País:  Brazil
Título:  Productivity and quality of Brachiaria brizantha B4 seeds in function of nitrogen doses
Autores:  Benteo,Gleiciane de Lima
Verzignassi,Jaqueline Rosemeire
Fernandes,Celso Dornelas
Valle,Cacilda Borges do
Macedo,Manuel Cláudio Motta
Libório,Cláudia Barrios de
Monteiro,Lenise Castilho
Data:  2016-09-01
Ano:  2016
Palavras-chave:  Fertilizer
Tropical forage
Seed quality
Resumo:  ABSTRACT: This study aimed to evaluate aspects of reproductive phenology, yield components and seed quality of the B4 genotype of Brachiaria brizantha in function of nitrogen doses applied at pre-flowering. The experiment was carried out at Embrapa Beef Cattle, in a randomized block design, with seeding density of 2.59kg SPV ha-1 in the first year, in free growth plants. Urea was applied at pre-flowering at doses of 0, 25, 50, 75, 100, 125 and 150kg ha-1. The reproductive cycle of the plant lasts 225 days, with late flowering. N doses influenced the following characteristics: number of fully expanded inflorescences, percentage of dry matter, dry biomass, number of spikelets per raceme, seed yield, weight of a thousand seeds, germination, germination speed index, viability and germination at 10 months after harvest. The maximum yield of pure seed was 144.8kg ha-1 for 50kg ha-1 N, with maximum biological potential, based on components of seed yield of 456.27kg ha-1. Seeds presented high dormancy and reduced physiological quality in higher N doses.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000901566
Editor:  Universidade Federal de Santa Maria
Relação:  10.1590/0103-8478cr20151536
Formato:  text/html
Fonte:  Ciência Rural v.46 n.9 2016
Direitos:  info:eu-repo/semantics/openAccess
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