Classification of Eucalyptus urograndis hybrids under different water availability based on biometric traits


Autoria(s): Silva, Claudia D.; Nascimento, Janiele S.; Scarpinati, Edmar A.; Paula, Rinaldo C.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

18/03/2015

18/03/2015

01/08/2014

Resumo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Aim of study: The eucalyptus grows rapidly and is well suitable to edaphic and bioclimatic conditions in several regions of of the world. The aim of this study was to assess the performance of Eucalyptus urograndis hybrids grown under different water availability conditions.Area of study: The study was performed in south-eastern of BrazilMaterial and methods: We evaluated five commercial hybrids cultivated in pots with the substrate maintained at 65, 50, 35 and 20% maximum water retention capacity. The evaluation was based on the following characteristics: total height (cm), diameter (mm), number of leaves, leaf area (dm(2)), and dry weight (g plant(-1)) of leaf, stem +branches, root, shoot and total and root/shoot ratio.Main results: All the characteristics evaluated were adversely affected by reduced availability of water in the substrate. The hybrids assessed performed differently in terms of biometric characteristics, irrespective of water availability. Water deficit resulted in a greater reduction in the dry weight production compared to number of leaves, diameter and height. Hybrids H2 and H5 have favorable traits for tolerating drought. The hybrid H2 shows a stronger slowdown in growth as soil moisture levels drop, although its growth rate is low, and H5 increases the root/shoot ratio but maintains growth in terms of height, even under drought conditions.Research highlights: The results obtained in our experiment show that productive hybrids sensitive to drought could also perform better under water deficit conditions, maintaining satisfactory growth despite significant drops in these characteristics.

Formato

209-215

Identificador

http://dx.doi.org/10.5424/fs/2014232-03528

Forest Systems. Madrid: Inst Nacional Investigacion Technologia Agraria Alimentaria, v. 23, n. 2, p. 209-215, 2014.

2171-5068

http://hdl.handle.net/11449/117577

10.5424/fs/2014232-03528

WOS:000339645900003

WOS000339645900003.pdf

Idioma(s)

eng

Publicador

Inst Nacional Investigacion Technologia Agraria Alimentaria

Relação

Forest Systems

Direitos

openAccess

Palavras-Chave #Eucalyptus urograndis #water deficit #drought tolerance
Tipo

info:eu-repo/semantics/article