Abstract
Allelopathic activities of newly introduced plants were evaluated using Sandwich method (for root exudates) and Plant Box method (for leaf leachates).
By Sandwich method, more than 1000 samples ware compiled and the results obtained using 10mg of leaves in 10cm2 shows the normal distribution. Sorghum, Oxalis, and Rosaceae family showed strong inhibitory activity.
By Plant Box method, Clarkia unguiculata, Gypsophila paniculata, Oenothera hookeri, Trifolium incarnatum, Ipomopsis rubra, Silene armeria, Avena strigos and, Anisantha madritensis showed strong inhibitory activity. Allelopathic activity of Astragalus sinicus, known as Chinese milk vetch was weak, but we found prominent inhibitory activity in newly introduced Astragalus.
