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应用生态学报 ›› 1995, Vol. 6 ›› Issue (2): 119-122.

• 研究论文 • 上一篇    下一篇

亚热带季风常绿阔叶林植被恢复Ⅱ.──木本豆科植物的气体交换

孙谷畴, 曾小平, 魏传钊, 余作岳   

  1. 中国科学院华南植物研究所, 广州 510650
  • 收稿日期:1993-10-27 修回日期:1994-05-30 出版日期:1995-04-25 发布日期:1995-04-25
  • 基金资助:

    国家自然科学基金

Vegetation recovery in subtropical monsoon evergreen broad-leaved forest Ⅱ Gas exchange of woody legumes

Sun Guchou, Zeng Xiaoping, Wei Chuanzhao, Yu Zuoyue   

  1. South China Institute of Botany, Academia Sinica, Guangzhou 510650
  • Received:1993-10-27 Revised:1994-05-30 Online:1995-04-25 Published:1995-04-25

摘要: 测定了几种木本豆科植物和乡土树种如木荷、桂西荷的叶片光合速率月变化,并在7和12月测定了几种乡土树种、木本豆科植物和亚热带常绿阔叶树的气体交换量。结果表明,乡土树种在5月或9月光合速率达最大值,而在5-9月之间由于太阳辐射强烈和气温较高,光合速率降低;但木本豆科植物绢毛相思和大叶相思光台速率则较高,说明木本豆科植物在华南夏季能适应当地酷热条件,保持较高光合速率。在7月,阴香日同化量为8.599·m-2,马占相思为5.699·m-2,乡土树种木荷达7.469·m-2.由此可见,乡土树种或常绿阔叶树种与木本豆科植物的阔叶混交林有助于提高太阳辐射能利用和增加光合同化产物,从而有利于亚热带常绿阔叶林植被的恢复。

关键词: 气体交换, 木本豆科植物, 乡土树种, 植被恢复

Abstract: Monthly variation of photosynthetic rates of leaves was measured with woody legumesand native plants as Schima superba and S.wallichii.The daily gas exchange rates inleaves of these plants and subtropical evergreen broad leaved plants were also determinedin July and December.Native plants have a maximum photosynthetic rate in May or September, which decreases among this duration due to the violent solar radiation andhigh air temperature.Woody legumes as Acacia holosericea and A.auriculaeformis alsohave a higher photosynthetic rate, which shows that these plants can adapt to the localhot weather in summer.The daily accumulation of photosynthetic products is 8.59g, m-2for Cinnamomum burmani, 5.69 g m-2 for A.mangium and 7.46 g·m-2 for native plant S.superba in July.Therefore, mixing native plants or evergreen broad leaved trees withwoody legumes will be beneficial to the promotion of solar radiation utilization, increase of photosynthetic production and recovery of vegetation in subtropical evergreen broadleaved forest.

Key words: Gas exchange, Woody legume, Native plant, Vegetation recovery