A Study on the Afforestation Techniques of Kandelia candel Mangrove

The trials were made on the hypocotyl collection,planting method,afforestation with different densities and different tide drowning depths of Kandelia candel. The best season of hypocotyl collection in Hainan,Lianjiang and Shenzhen is from February 5 to March 5,February 25 to Aprial 25,and March 5 to May 5 respectively.The survival rate is over 88% if the planting with hypocotyl is adopted and the hypocotyl is planted properly deep(2/3 length of it) in the flat with soft silt,strong wind and tide.On the contrary,it is below 37% if the transplanting with seedlings or young trees of one to several years old is adopted.The mudflat height above tide datum plane,where the young trees can grow,must be first selected carefully, because the growth of seedlings and young trees is greatly affected by the tide drowned depth.The mudflat height suitable to planting for each area is different according to different tide characters,and the height should be above 1.3m in Shenzhen bay.The space of initial plantation should be 0.5m×1.0m or 1m×1m.