Screening strains for Trichoderma spp. for strong antagonism against ginseng root pathogens and study on their biological characters Effects of Rhizome Ginseng and Root Saponin on the ATPase Activity in Heart, Liver, Cerebrum, Kidney and Spleen of Mouse Analysis on three kinds of oxidoreductase isozymes in ginseng root at different growth periods Analysis on three kinds of oxidoreductase isozymes in ginseng root at different growth periods