Seasonal Partitioning of Evaporation Between Trees and Understorey in a Widely Spaced Pinus radiata Stand
1994; Wiley; Volume: 31; Issue: 3 Linguagem: Inglês
10.2307/2404448
ISSN1365-2664
AutoresDavid Whitehead, Francis M. Kelliher, Paul M. Lane, Dennis S. Pollock,
Tópico(s)Tree-ring climate responses
ResumoTree transpiration, E t , and understorey evaporation, E u , were measured hourly on 2-3 fine days during 12 periods throughout a year in a Pinus radiata plantation. There were 450 stems ha −1 and 60% of the herbaceous understorey vegetation and forest floor was covered by dead stems, branches and foliage from earlier thinning and pruning operations. Annual rainfall was 1154 mm and the trees and understorey vegetation were supplied adequately with water throughout the year. When stomatal conductance, g s , was normalized to a maximum value, g max , for each shoot, 87% of the variability was attributable to air saturation deficit above the forest canopy, D, and incident quantum flux density, Q
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