Soil fertilities of three you ng broadleaf mixed plantations were compared with those of a Cunninghamia lanceolata plantation.The soils of the broadleaf mixed plantations were rather strong in acidity.Among four plantations

the contents of soil organic mat ter

total N and available P were the highest in the first evergreen broadleaf mixed plantation

and its other nutrient contents were higher than the C.lanceolata plantation or similar to the latter; Total P

total K

alkalized N and available K were the highest in the sec- ond evergreen broadleaf mixed plantation

and its soil organic matter

total N and available P contents were greater than C.lanceolata plantation; Soil organic matter

total N and alkalized N of the third evergreen broadleaf mixed forest were greater than those of the C.lanceolata plantation

whereas its other nutrient contents were lower than the latter.The amounts of soil bacterium

fungi and actinomyces of the first and second evergreen broadleaf mixed plantations were greater than those of C.lanceolata plantation

and their urease

phosphoric acid enzyme and catalase activities were high

indicating that the two plantations significandy improved soil fertility.