Verschmutzung von Blatt‐ und Nadeloberflächen im Nahbereich einer Autobahn und deren Einfluß auf den stomatären Diffusionswiderstand

摘要

AbstractPollution of leaf and needle surfaces near a highway and its effect on stomatal diffusive resistance. Young clones of several trees and shrubs were exposed on the dividing strip of a highway in spring 1976. After three months, surfaces of leaves and needles were extremely polluted and their stomata occluded. During warm dry days in June and July stomatal diffusive resistance in aspen, birch, alder and ash showed a significant (P<0.02) decrease compared to control plants. Compared with the control, temperature on the strip was higher in the soil but not in the air. It is suggested that this pollution effect may cause an increased water stress and reduced growth of plants in dry, hot periods.