Stomatal and boundary-layer conductances in an Amazonian terra firme rain forest.
作者： John Roberts , Osvaldo M. R. Cabral , Leandro Ferreira De Aguiar
DOI: 10.2307/2403590
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摘要: (1) Diurnal measurements of stomatal conductance (gs) and boundary layer (ga) were made through the canopy at a primary rain forest site in Amazon Basin, Brazil, three experimental seasons over range soil water conditions. (2) Maximum values g, observed near top 40 m deep they declined towards floor. Observed ga also decreased canopy, but slight maximum occurred 20 from ground. (3) In upper part tree diurnal gs midmorning value for remainder day. This peak was less marked lower not present (4) correlated negatively with specific humidity deficit (D) positively solar radiation (S). The response to D increased increasing S all highest S. (5) lowest same time as potentials, although these corresponded only moderate deficits.
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