EFFECTS OF HIGH CO2-CONCENTRATIONS ON STO MATAL DENSITIES OF WHITE CLOVER LEAVES

White clover (Trifolium repens) has been grown in OT-chambers under di fferent CO2-concentrations (380 and 670 ppm). The reaction of the plan ts in respect to yield and stomata density of the leaves has been test ed. Yields and CO2-concentration were correlated positively within two years of investigations. No difference could be found in stomata dens ities of both leaf sides in respect to CO2-concentrations.