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- Title
BALANÇO HÍDRICO E DE ENERGÍA PARA PLANTÍOS DE EUCALIPTO COM COBERTURA PARCIAL DO SOLO.
- Authors
dos Reis, Mariana Gonçalves; Ribeiro, Aristides; Evangelista Baesso, Raquel Couto; de Souza, Wesley Gonçalves; Fonseca, Sebastião; Loos, Rodolfo Araujo
- Abstract
Eucalyptus plots with initial development ages presented discontinuity in soil cover, resulting in greater e×posure of the leaves to wind and solar radiation, which alters soil-plant-atmosphere interactions. The objeetive of this study was to study the components of the water and energy balanees along the first year of eucalyptus development in the Brazilian eoastal plain region. The e×perimental site is loeated in an area belonging to the company Fibria in the municipality of Aracmz, Espirito Santo state, Brazil. The space between the planted eucalyptus trees in the area studied was 3 × 3 m and the data of planting was on August 15th , 2004. The period of study lasted from the planting date until the plot reached an age of 19 months. It was verified that there was a greater availability of energy during the summer and the precipitation directly influenced the energy balance where during the period of study the energy available necessary for evapotranspiration was always greater than the fraction necessary for heating the soil-plantatmosphere system, presenting a λE/Rn ratio of 59.57%. It was also observed that the water balance with the modeled evapotranspiration showed a good correspondence with the observed moisture content, presenting a determination coefficient of 0,94. In the majority of trees, greater indices of leaf and root system areas favored evapotranspiration, indicating that most energy available was utilized for changing the phase of water.
- Subjects
EUCALYPTUS; PLANT-water relationships; MYRTACEAE; RAINFALL; SOLAR radiation
- Publication
Ciência Florestal (01039954), 2014, Vol 24, Issue 1, p117
- ISSN
0103-9954
- Publication type
Article
- DOI
10.5902/1980509813329