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生态学杂志 ›› 2009, Vol. 28 ›› Issue (08): 1476-1481.

• 研究报告 • 上一篇    下一篇

模拟酸雨对山核桃和杨梅光合生理特征的影响

鲁美娟1;江洪1,2,3;余树全3;蒋馥蔚1;李佳3;曹全1   

  1. 1西南大学生命科学学院 三峡库区生态环境教育部重点实验室;2南京大学国际地球系统科学研究所;3浙江林学院国际空间生态与生态系统生态研究中心
  • 出版日期:2009-08-10 发布日期:2009-08-10

Effects of simulated acid rain on photosynthetic physiology of Carya cathayensis and Myrica rubra.

LU Mei-Juan1;JIANG Hong1,2,3;TU Shu-Quan3;JIANG Bi-Wei1;LI Jia3;CAO Quan1   

  1. 1Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, School of Life Science, Southwest University;2International Institute for Earth System Science, Nanjing University;3International Research Center of Spatial Ecology and Ecosystem Ecology, Zhejiang Forestry University
  • Online:2009-08-10 Published:2009-08-10

摘要: 通过盆栽模拟酸雨淋喷实验,比较了浙江省典型经济植物山核桃和杨梅幼苗光合特性的差异,研究了不同强度酸雨胁迫(pH 2.5、pH 4.0 和 pH 5.6(对照))对其光合生理生态特征的影响。结果表明,在无酸雨条件下,杨梅的最大净光合速率、暗呼吸速率、光饱和点和光补偿点明显高于山核桃。酸雨胁迫下,pH 4.0的酸雨胁迫使山核桃的最大净光合速率、光饱和点显著降低,使杨梅的表观量子效率显著升高,而pH 2.5的酸雨胁迫使山核桃的最大净光合速率、表观量子效率显著降低,使杨梅的光饱和点显著升高。从季节反应模式来看,酸雨对山核桃光合特性的影响在夏季较春季明显,而对杨梅的影响则春季较夏秋季明显。

关键词: 退化生态系统, 退化程度, 演替理论, 植被恢复, 油松, 辽宁西部

Abstract: Taking the typical subtropical economic tree species Carya cathayensis and  Myrica rubra in Zhejiang Province as test objects, a pot experiment was conducted to study the photosynthetic characteristics of their seedlings under effects of simulated acid rain with a gradient of pH 2.5, pH 4.0, and pH 5.6 (CK). In the maximum net photosynthetic rate ( A max ), dark respiration rate ( R d), light saturation point ( LSP ), and light compensate point ( LCP ) of  M. rubra  were obviously higher than those of  C. cathayensis under no acid rain condition. Under the effects of pH 4.0 acid rain, the A max  and  LSP of  C. cathayensis  decreased significantly, and the apparent quantum efficiency ( AQE ) of  M. rubra  increased significantly; while under the stress of pH 2.5 acid rain, the Amax and AQE of  C. cathayensis  decreased significantly, and the LSP of M. rubra increased significantly. The effects of acid rain on  C. cathayensis were greater in summer than in spring, and those on  M. rubra  were greater in spring than in summer and autumn.

Key words: Degraded ecosystem, Degradation degree, Succession theory, Vegetation restoration, Chinese pine, Western Liaoning Province