Studies on the Effect of Sulphur Dioxide on Perennial Ryegrass (Lolium perenneL.)

Abstract

The characteristics of a wind tunnel fumigation system in which plants can be exposed to air pollutants under controlled conditions over prolonged time periods and at near ambient wind speeds are described. Preliminary experiments exposing perennial ryegrass (Lolium perenne L.) to 650, 700, and 2600 μg SO₂ m⁻³ showed (i) the consistency of performance of the system and (ii) the lack of correlation in relative response of individual clones to acute and chronic fumigation. The results obtained are compared with those of other research groups.