Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/1460
Título: A fertilização azotada de pés-mãe de Eucalyptus globulus Labill.: efeito no crescimento
Outros títulos: Nitrogen fertilization of Eucalyptus globulus Labill.mother plants: effect on growth
Autor: Vasconcelos, E.
Ribeiro, H.M.
Ramos, A.
Coutinho, J.
Palavras-chave: eucalyptus globulus
mother plants
nitrogen fertilization
Data: Jan-2009
Editora: Sociedade de Ciências Agrárias de Portugal
Citação: "Revista de Ciências Agrárias". ISSN 0871-018X. 32:1 (2009) 50-62
Resumo: To asses the effect of N fertilization on the growth of E. globulus stock plants, a nitrogen fertilization experiment was performed. During 3 years, stock plants of 2 clones (HD161 and CN5) were fertilized with complete nutrient solutions containing 5 different levels of N (50, 100, 200, 400 and 800 mg N L-1). Total biomass, leafbiomass, leaf area and number of shoots produced during the 3 years period were measured. Increasing levels of applied nitrogen till 400 mg N L-1 led to a significant increase of both biomass and shoot production. However, these productions were not significantly affected when N fertilization increased from 400 to 800 mg N L-1. Increasing levels of applied nitrogen also led to an increase of: i) total leaf area ii) specific leaf area (29% increase) and iii) leaf area ratio (13% increase), showing that with a higher N availability stock plants tend to improve their photosynthetic apparatus. Results show that nitrogen is a fundamental nutrient for the growth of E globulus stock plants and, as a consequence, nitrogen fertilization must be optimized. The maximum growth of E. globulus mother plants was achieved with 400 mg N L-1.
URI: http://hdl.handle.net/10400.5/1460
ISSN: 0871-018X
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