Data/hora: 01/06/2024 16:39:37

Provedor de dados: | Revista Brasileira de Zootecnia
País: | Brazil
Título: | Forage productivity and morphogenesis of Axonopus aureus under different nitrogen fertilization rates
Autores: | Costa,Newton de Lucena; Moraes,Anibal de; Monteiro,Alda Lúcia Gomes; Motta,Antonio Carlos Vargas; Oliveira,Ricardo Augusto de; Rodrigues,Antonio Neri Azevedo.
Data: | 2013-08-01
Ano: | 2013
Palavras-chave: | Dry weight; Leaf; Senescence; Tillering.
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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000800002
Editor: | Sociedade Brasileira de Zootecnia
Relação: | 10.1590/S1516-35982013000800002
Formato: | text/html
Fonte: | Revista Brasileira de Zootecnia  v.42 n.8 2013
Fonte: | info:eu-repo/semantics/openAccess