Clones de Eucalyptus sp. submetidos a estresse hídrico em dois tipos de solo

• Autor(a) principal: Lima, Kaio Baron de [UNESP]
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/126633; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/10-08-2015/000844755.pdf
• topic: Eucalipto; Desidratação (Hídrica); Arvores - Mudas; Solos - Analise; Arboriculture

Plant development is related, among other factors, to the availability of water in the soil, as well as their ability to adapt and respond to water deficits. The objective of this study was to assess the possible effects of drought stress on the growth, and on some morphological and physiological aspects of four distinct genetic materials of Eucalyptus sp. in two types of soil, sandy loam and clay. The experiment was conducted in pots at a greenhouse in the Department of Forestry Sciences, Faculty of Agricultural Sciences, UNESP, Botucatu, from February to April of 2014. The minimal potentials of water in the soil: No stress (SE) = -10 kPa; and Stressed (CE) = -1500 kPa, were used to define the water management employed. The replacement of water evapotranspired was determined by weighing the pots, and tensiometers were also used for more effective irrigation control in the SE treatment. The four clones used were: AEC-144, AEC-1528, COP 1407 and VM01 (clones 1, 2, 3 and 4 respectively), all materials were commercially produced and planted in national territory. The aspects of the plants that were evaluated at 0, 25, 50 and 75 days after planting were: height of aerial parts, stem diameter, leaf area, number of leaves, total dry mass, stomatal resistance, leaf water potential and relative content of leaf water. The test consisted of a double factorial 2x4 (two levels of water x four genetic material) and soil types analyzed separately. The results, in both soil types, indicate an influence of water management treatments in the aspects evaluated. At the last evaluation, 75 days after implantation, for the sandy ...