植物生态学报 ›› 1988, Vol. 12 ›› Issue (1): 31-39.

所属专题: 红树林及红树植物

• 论文 • 上一篇    下一篇

海莲、秋茄两种红树群落能量的研究

林光辉,林鹏   

  • 发布日期:1988-01-10
  • 通讯作者: 林光辉

Studies on Energy in Two Mangrove Communities, Bruguiera sexangula and Kandelia candel, in China

Lin Guang-hui, Lin Peng   

  • Published:1988-01-10
  • Contact: Kong Ling-shao

摘要: 本文应用热值测定,对中国两种典型红树群落,即海南岛的海莲群落及福建九龙江口的秋茄群落样品热值、群落能量现存量、能量固定量以及太阳能转化效率进行了测定和分析.结果表明:(1)红树群落各组分样品之间热值有一定的差异;一般叶、花的热值较高,而根、树皮的热值较低。(2)群落能量现存量海莲群落(1984年1月)高达178,627kcal/m2,秋茄群落为70,547kcal/m2,群落能量在不同组分以及不同高度层次上均有不同的分配比。(3)海莲群落(1983)、秋茄群落(1982)能量年净固定量分别为15,772kcal/m2和10,456kcal/m2,相应地对林地太阳光合有效辐射能的转化效率依次为3.01%和2.01%;红树群落比其他植物群落具有较高的能量固定能力及太阳能转化效率。

Abstract: By means of calorimetry measurement, the standing crop of energy, net energy production and energy conversing efficiencies of two mangrove communities, i. e. Bruguiera sexangula community & Kandelia candeI community, were determined and discussed in the present paper.The results of measurement of caloric values for various components showed that there were some differences in caloric value among components of these two mangrove communities. In general, leaves and flowers possessed higher caloric values, while roots and bark of trunk possesses lower caloric values.The standing crop of energy in B. sexangula community was 178,627 kcal. m-2, much larger than that in K. candel community (70,547kcal·m-2). There existed different distributions of energy in the various components and different layers of community. Net energy production was 15,772 kcal·m-2.a-1 for B. sexangula community (1983) and 10,456 kcal m-2·a-1 for K. candel community (1982). To the photosynthetical active radiation on the stand, their energy converting efficiencies were 3.01% and 2.01% respectively, compared with other plant communities in nature, mangrove forests possess relatively larger energy production and higher energy converting efficiencies.From the results mentioned above, it can be concluded that mangrove forests show their own characteristics on standing crop and production of .energy and play an important role in mangrove ecosystems. Therefore, it is worthy to protect and exploit mangrove forests.