Data/hora: 05/06/2024 10:00:02

Provedor de dados: 	96	
País: 	Brazil	
Título: 	Growth index in massai grass under different levels of nitrogen fertilization	
Autores: 	Lopes,Marcos Neves; Pompeu,Roberto Cláudio Fernandes Franco; Cândido,Magno José Duarte; Lacerda,Claudivan Feitosa de; Silva,Rodrigo Gregório da; Fernandes,Francisco Ronaldo Belem.	
Data: 	2011-12-01	
Ano: 	2011	
Palavras-chave: 	Herbage growth; Net assimilation rate; Nitrogen fertilizer; Panicum maximum × Panicum infestum.	
Resumo: 	This study aimed to evaluate the growth index of massai grass during two regrowth cycles in a greenhouse under five levels of nitrogen (0, 150, 300, 450 and 600 mg N/dm³ of soil) and eight growth ages (5, 8, 11, 14, 17, 20, 23 and 26 days) in a split-plot design with five replications. The following variables were evaluated: net assimilation rate, herbage growth rate, relative growth rate, leaf area ratio, leaf weight ratio and specific leaf area. The effect of nitrogen was detected on the variables net assimilation rate (regrowths 1 and 2), leaf area ratio (regrowth 1), leaf weight ratio (regrowths 1 and 2), specific leaf area (regrowths 1 and 2) and herbage growth rate (regrowths 1 and 2). The growth ages influenced the relative growth rate (regrowth 2) and the net assimilation rate (regrowth 2). The net assimilation rate presented linear effect, estimated in 0.70 and 2.86 g/m² leaf.day-1 for the 0 and 600 mg N/dm³ soil, respectively (regrowth 1). For each milligram of N/dm³ added, the leaf area ratio was reduced in 0.0000258 m² leaf/g plant (regrowth 1). The herbage growth rate was estimated in 1.38 and 37.02 g/m².day-1 (regrowth 1), and 4.37 and 32.20 g/m².day-1 (regrowth 2) for the 0 and 600 mg N/dm³ soil, respectively. The massai grass' growth is favored by nitrogen fertilization, and little do the growth ages affect the growth index of the plants.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200008	
Editor: 	Sociedade Brasileira de Zootecnia	
Relação: 	10.1590/S1516-35982011001200008	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Zootecnia  v.40 n.12 2011	
Fonte: 	info:eu-repo/semantics/openAccess