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XU Chun-hua1, ZHANG Hua1,2**, ZHANG Lan1, KANG Ya-rong1
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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
XU Chun-hua1, ZHANG Hua1,2**, ZHANG Lan1, KANG Ya-rong1. Factors influencing photosynthesis of three typical plant species in Beishan Mountain of Lanzhou based on path analysis.[J]. cje.
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URL: https://www.cje.net.cn/EN/abstract/abstract21977.shtml
https://www.cje.net.cn/EN/Y2015/V34/I5/1289