It was concluded that the temperate deciduous broad-leaved forests of the world have close affinity in origin and the deciduous broad-leaved forest of east Asia is the initial one of which most floristic elements show close affinity to the flora of subtropical mountains in SW China.

The diversity of soil microorganism during different recovery phases of moist evergreen broad-leaved forest in the rainy zone of west China;

Soil humus,active organic matter and nutrients of native broadleaved forests and Chinese fir (Cunninghamia lanceolata) plantations in subtropical region were investigated to study effects of forest conversion and continuous plantation on soil organic carbon and nutrients at large scale.

The diameter distributions were simulated by the modified exponential distribution function for describing the stand structure, based on inventory data of broad-leaf forest in Changbai Mountain.

Analysis on changes of broad-leaf forest in Zhejiang province demonstrated serious problem of forest safety in the province.

Based on analysis on current situation, characters and changing dynamics of broad-leaf forest resources in Taishun, Zhejiang province, measurements were offered for protection and development of the resources.