The Structure of Sonneratia apetala+S. caseolaris-Kandelia candelMangrove Plantations of Futian,Shenzhen

The plantation experiments of Sonneratia apetala+S. caseolaris-Kandelia candel forest in front of the natural forests in Futian of Shenzhen Natural Reserve indicated that the 7 year old community was divided obviously into three layers: arbor layer, shrubs layer and seedlings layer. The average heights of S. apetala, S. caseolaris and K. candel in the arbor layer were 9.11 m,8.06 m,and 2.89 m respectively. During the course of community forming, the biodiversity decreased at first and then increased, exceeding the diversity when planting. The mortality of S. apetala and S. caseolaris was the highest in the first year, and gradually tended to be stable. The mortality of K. candel was the highest in the third and fourth year, and gradually tended to be stable. The survival rates of S. apetala, S. caseolaris and K. candel after 7 years were 56 3%, 51% and 39% respectively. The growth speed of height and diameter of S. apetala, S. caseolaris was obviously faster than that of K. candel.