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	Provedor de dados Acta Botanica (1) R. Bras. Zootec. (1) Autor Bona,Fabiano Daniel De (1) Haddad,Claudia Regina Baptista (1) Lima,Ana Lúcia da Silva (1) Monteiro,Francisco Antonio (1) Santos,Jorge Henrique da Silva (1) Schiavianto,Marlene Aparecida (1) Zanella,Fábio (1) Mais... Palavra-chave Nitrogen-use efficiency (2) Forage production (1) Leaf life span (1) Nitrogen fixation (1) Nitrogen nutrition (1) Nitrogen resorption efficiency (1) Nitrogen resorption proficiency (1) Plant development (1) Tillering (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2013 (1) 2006 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Growth and productive responses of tropical grass Panicum maximum to nitrate and ammonium supply R. Bras. Zootec. Santos,Jorge Henrique da Silva; Bona,Fabiano Daniel De; Monteiro,Francisco Antonio. This study was conducted to investigate growth response parameters and forage yield of Panicum maximum Jacq. plants supplied with nitrate (NO3-) and ammonium (NH4+) as N source in a nutrient solution. Six NO3- and NH4+ combinations were tested at the following proportions: 100-0, 85-15, 70-30, 55-45, 40-60 and 25-75%. Grass shoot (number of tillers and leaves and leaf surface area) and root (length and surface area) growth parameters and dry matter production exhibited highest values in P. maximum plants growing in the nutrient solution supplied with NO3-:NH4+ at the proportions ranging between approximately 70-30 and 55-45%. The use of NO3-:NH4+ mixture at the ratio of 55-45% instead of the NO3- solely as N source in the nutrient solution enhanced the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Forage production; Nitrogen nutrition; Nitrogen-use efficiency; Plant development; Tillering. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000900003 N availability and mechanisms of N conservation in deciduous and semideciduous tropical forest legume trees Acta Botanica Lima,Ana Lúcia da Silva; Zanella,Fábio; Schiavianto,Marlene Aparecida; Haddad,Claudia Regina Baptista. Prior to abscission, nutrients are redeployed from leaves and redistributed to other parts of the plant. Data comparing nutrient resorption to soil fertility and leaf life span remains controversial in the literature. We compared nitrogen (N) conservation mechanisms among four legume trees with different leaf life spans (Hymenaea courbaril L. var. stilbocarpa (Hayne) Lee et Lang., Lonchocarpus guilleminianus (Tul.) Malme, Enterolobium contortisiliquum (Vell.) Morong and Peltophorum dubium (Spreng.) Taub.), from a semideciduous tropical forest, remnant of the Atlantic Forest. We hypothesized that these mechanisms differ among the four species and are affected by their leaf life span and by the availability of N, both as a mineral in the soil and, in the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Leaf life span; Nitrogen fixation; Nitrogen resorption efficiency; Nitrogen resorption proficiency; Nitrogen-use efficiency. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062006000300012 Registros recuperados: 2 Primeira ... 1 ... Última

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