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Drought sensitivity of red spruce seedlings affected by precipitation chemistry. [Picea rubens]

Conference ·
OSTI ID:5686879

Red spruce seedlings that had been exposed to a combination of simulated rain of pH 4.1 and mist of pH 3.6 were more severely affected by a drought regime than were seedlings treated with rain and mist of pH 5.1. The increased drought susceptibility, which was manifested in lower xylem water potentials and a greater reduction in photosynthesis, was not a result of altered physiological resistance, but was an indirect effect of a stimulation of needle growth by nitrogen fertilization, which increased plant water use and the severity of the drought.

Research Organization:
Oak Ridge National Lab., TN (USA)
DOE Contract Number:
AC05-84OR21400
OSTI ID:
5686879
Report Number(s):
CONF-8606147-1; ON: DE86012231
Country of Publication:
United States
Language:
English