Effect of Prolonged Drought on Water Relations of Ponderosa Pine SeedlingsGrowing in Basalt and Sedimentary Soils

摘要

The study compared the effects of prolonged drought on container and bare rootponderosa pine seedlings growing in sedimentary and basalt soils. Seasonal and diurnal responses were compared. Upon rewatering, transpiration and needle water potential of stressed seedlings recovered quite rapidly but stomatal conductance recovered less rapidly. In cases of severe drought, survival will probably be higher on basalt soil.