Beschreibung:
Mycorrhizal infection was studied in mixed samples from rain-forest roots in relation to soil fertility (pH(KCl), total P and P-Al), vegetation structure and litterfall in a rain forest reserve on terraces of different geological age. A marked lowering of topsoil pH and reduction in available phosphorus levels with increasing geological age was found. Vesicular-arbuscular mycorrhizal infection of root samples of mixed vegetation was negatively correlated with both soil pH and P-Al.