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• 微重力和空间生命科学 • Previous Articles     Next Articles

Study on O2-supply Characteristics of Azolla in Controlled Ecological Life Support System

CHEN Min, DENG Sufang, YANG Youquan, HUANG Yibin, LIU Zhongzhu   

  1. Agricultural Ecology Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350013
  • Received:2011-06-05 Revised:2012-01-12 Online:2012-03-15 Published:2012-03-15

Abstract: In this study, we try to investigate the O2-supply characteristics under manned condition in order to lay a foundation for carrying out Azolla biological component systematical and general ground simulation experiment and space application. A closed test cabin of Controlled Ecological Life Support System and Azolla wet-culturing devices were built to measure the changes of atmospheric O2-CO2 concentration inside the cabin under “Azolla-fish-men” coexisting condition. The results showed that, O2 consumption amount per unit weight of fish is 0.0805~0.0831L·kg-1·h-1, the CO2 emission amount is 0.0705~0.0736L·kg-1·h-1. Which of trial volunteers is O2 19.71L·h-1 and CO2 18.90L·h-1 under 7000~8000 lx. Artificial light, human and fish respiring and Azolla photosynthetic O2-releasing tend to achieve O2-CO2 homeostasis inside the cabin. Enhancing atmospheric CO2 concentrations in the cabin obviously promoted Azolla group net photosynthesis efficiency. This shows that Azolla has strong photosynthetic O2-release ability, which equilibrates the O2-CO2 concentration inside the cabin in favor of human survival, and then verifies the prospect of Azolla in space application.

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