受控生态生保系统内红萍供氧特性研究

研究红萍载人供O₂特征,为红萍生物部件进行系统总体地面模拟试验及空间应用奠定基础,构建了受控生态生保系统密闭试验舱和红萍栽培装置,在"红萍-鱼-人"共存情况下,测定密闭舱内O₂,CO₂浓度的变化.试验结果显示,单位重量的鱼耗O₂量为0.0805～0.0831 L·kg^-1·h^-1,排放CO₂量为0.0705～0.0736 L·kg^-1·h^-1;试验志愿者耗O₂量19.71 L·h^-1,呼吸释放CO₂量18.90 L·h^-1.人工光照保持7000～8000 lx条件下,红萍的光合作用与人和鱼的呼吸作用相辅相成,舱内O₂,CO₂浓度趋于平衡.密闭舱内CO₂浓度升高对促进红萍群体净光合效率有明显效果,红萍光合放O₂能力很强,能有效促使密闭舱内O₂,CO₂浓度朝着有利于人生存的环境方向平衡,进而验证了红萍的空间应用前景.

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

In this study,we try to investigate the 02-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 offish is 0.0805⁰.0831L·kg^-1·h^-1,the CO₂ emission amount is 0.0705⁰.0736L·kg^-1·h^-1.Which of trial volunteers is O₂ 19.71 L·h^-1 and CO₂ 18.90 L·h^-1 under 7000⁸000lx.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.