Registro completo |
Provedor de dados: |
Ciência Rural
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País: |
Brazil
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Título: |
Productivity and quality of Brachiaria brizantha B4 seeds in function of nitrogen doses
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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
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Data: |
2016-09-01
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Ano: |
2016
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Palavras-chave: |
Fertilizer
Tropical forage
Seed quality
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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.
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Tipo: |
Info:eu-repo/semantics/article
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Idioma: |
Inglês
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Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000901566
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Editor: |
Universidade Federal de Santa Maria
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Relação: |
10.1590/0103-8478cr20151536
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Formato: |
text/html
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Fonte: |
Ciência Rural v.46 n.9 2016
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Direitos: |
info:eu-repo/semantics/openAccess
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