深圳福田无瓣海桑+海桑-秋茄人工林结构的研究

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

深圳福田自然保护区天然林前缘种植无瓣海桑、海桑、秋茄的试验表明 ,7a后 ,群落明显分为乔木层、幼树层和幼苗层 3层。乔木层的无瓣海桑、海桑、秋茄的平均高分别为 9.1、 8.0 6、2 .89m。在群落形成过程中 ,物种多样性先下降 ,后上升 ,并超过种植时的多样性 ;无瓣海桑和海桑的死亡率第 1年最高 ,后趋于稳定 ,秋茄的死亡率最高是第 4年 ,后趋于降低 ;7年生时无瓣海桑、海桑、秋茄的存活率分别为 5 6 .3%、5 1%、39%。无瓣海桑和海桑的高度和地径的生长速度明显比秋茄快。

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.