| Registro completo |
| Provedor de dados: |
R. Bras. Zootec.
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| País: |
Brazil
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| Título: |
Forage productivity and morphogenesis of Axonopus aureus under different nitrogen fertilization rates
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| Autores: |
Costa,Newton de Lucena
Moraes,Anibal de
Monteiro,Alda Lúcia Gomes
Motta,Antonio Carlos Vargas
Oliveira,Ricardo Augusto de
Rodrigues,Antonio Neri Azevedo
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| Data: |
2013-08-01
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| Ano: |
2013
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| Palavras-chave: |
Dry weight
Leaf
Senescence
Tillering
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| Resumo: |
The effect of nitrogen (N) fertilization (0, 50, 100 and 200 kg N ha-1) on forage yield and morphogenesis of Axonopus aureus was evaluated in the savannas of Roraima State, Brazil. The experimental design was in randomized blocks with three replicates. The grass showed high responsiveness to N fertilization. Dry weight (DW) yield, morphogenetic and structural traits and forage quality were positively affected by N fertilization. The effects of N fertilization on DW yield, N content, leaf appearance rate, leaf elongation rate, number of live leaves/tiller, final leaf length and leaf area index were quadratic and maximum values were estimated with application of 168.8 (2,181 kg ha-1); 124.8 (21.1 g/kg); 158.5 (0.163 leaf/day per tiller); 172.3 (2.75 cm/tiller per day); 155.5 (17.23 cm); 185.5 (7.55 leaves/tiller) and 185.3 (2.22) kg N ha-1, respectively. Tiller population density and leaf senescence rate are directly proportional to increase in N rates, and the opposite occurs for N utilization efficiency and apparent N recovery.
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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=S1516-35982013000800002
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| Editor: |
Sociedade Brasileira de Zootecnia
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| Relação: |
10.1590/S1516-35982013000800002
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Zootecnia v.42 n.8 2013
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| Direitos: |
info:eu-repo/semantics/openAccess
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