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基于通径分析的兰州北山三种典型植物光合作用影响因子

徐春华1,张华1,2**,张兰1,康雅茸1   

  1. (1西北师范大学地理与环境科学学院, 兰州 730070; 2兰州大学草地农业系统国家重点实验室, 兰州 730000)
  • 出版日期:2015-05-10 发布日期:2015-05-10

Factors influencing photosynthesis of three typical plant species in Beishan Mountain of Lanzhou based on path analysis.

XU Chun-hua1, ZHANG Hua1,2**, ZHANG Lan1, KANG Ya-rong1   

  1. (1College of Geographic and Environmental Sciences, Northwest Normal University, Lanzhou 730070, China; 2State Key Laboratory of Grassland Pastoral Agricultural Ecosystem, Lanzhou University, Lanzhou 730070, China)
  • Online:2015-05-10 Published:2015-05-10

摘要:

采用CI-340便携式手持光合测量系统和WatchDog 2000自动气象站,观测了兰州北山侧柏、柠条和柽柳的光合作用及其影响因子,使用通径分析探讨了各因子对光合作用的影响。结果表明:(1)影响3种植物光合作用的主要决定生理因子各有不同:侧柏为蒸腾速率,柠条为胞间CO2浓度,柽柳为叶温;主要生理限定因子也存在差异:侧柏和柠条为叶温,柽柳则为蒸腾速率。(2)3种植物的主要环境决定因子和限定因子均存在差异:侧柏主要环境决定因子为光合有效辐射,柠条和柽柳主要环境决定因子为相对湿度;侧柏和柽柳主要环境限定因子为土壤湿度,柠条的主要环境限定因子为大气CO2浓度。
 

关键词: 芽孢杆菌, 微生物区系, 促生

Abstract: The CI-340 Portable Photosynthesis System and WatchDog 2000 Weather Station were employed to measure the photosynthesis of Platycladus orientalis L., Caragana korshinskii Kom. and Tamarix austromongolica Nakai in the Beishan Mountain of Lanzhou. The influencing factors of photosynthesis were observed and analyzed by path analysis. The results showed that: (1) The main physiological determinant factors were different among the three plants: transpiration rate for P. orientalis, intercellular CO2 concentration for C. korshinskii and leaf temperature for T. austromongolica. There were also obvious distinctions in the main physiological limiting factors among the three plants: leaf temperature for P. orientalis and C. korshinskii, and transpiration rate for T. austromongolica. (2) The three plant species differed in determinant environmental factors affecting their photosynthesis. Photosynthetically active radiation was the major environmental determinant for P. orientalis, and air relative humidity for C. korshinskii and T. austromongolica. However, soil moisture was the major environmental limiting factor for P. orientalis and T. austromongolica, and atmospheric CO2 concentration for C. korshinskii.

Key words: plant growth promoting, Bacillus, microflora