2010•LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas)Open access
Growth analysis of clone Eucaliptus under hydric stress.
María Renata Rocha Pereira, Guilherme Sasso Ferreira de Souza, A. C. P. Rodrigues, André Luíz Melhorança Filho, Antônio Evaldo Klar
Open full text 0 citations
Abstract
The aim of this study was to evaluate Eucaliptus grandis genotypes (Clones 105 and 433) in relation to drought tolerance, through growth plant analysis. Black PVC pots with 10 liter volume were used for cultivate plants in polyethilene greenhouse oriented east/west. Completely randonmized design with four treatments was used: two clones and two minimum soil water potentials (- 0.03 and -1,5 MPa) and sixteen replicates. Pots were weighed daily in order to evaluate water content and characteristic soli water curve was determined. Plant development was obtained each 15 days from planting until 60 days through total dry matter (DM), leaf area index (LAI), leaf area ratio (LAR), net assimilative ratio (NAR), specific leaf area (SLA), relative growth ratio (RGR) and absolute growth ratio (AGR). Results showed that clone 105 presented less sensibility to water deficit, which qualify it as genetic material for use under dry soil conditons. On the other hand, both clones had similar behavior with no water restrictions.