The Analysis of Biodiversity of Ever green Broad-leaved Second Growth and Plantation in Damaoshan Mountain,Jiangxi Province

In 1995,the community characteristics of the ever-green broad-leaved second growth and the Chinese fir plantation were investigated in Damaoshan Mountain,Jiangxi Province. Their biodiversity difference were studied and their forest growth condition and the amount of above-ground biomass compared. The results show there are distince differences of community characteristics between them,and the biodiversity indices (Simpson diversity index,species richness of community,community evenness) of the second growth are higher than those of the plantation,under the same site conditions stock and growth in unit area of the second growth are lower than those of the plantation,but above ground biomass of the second growth is higher. All these results proved that the closing of forest area played a positive role in protecting biosources and biodiversity.