Corey K A, Wheeler R M
Department of Plant and Soil Sciences, University of Massachusetts, Amherst 01003.
Bioscience. 1992 Jul-Aug;42(7):503-9.
An important aspect of environmental control in a life-support system is the monitoring and regulation of atmospheric gases (Sager et al. 1988) at concentrations required for the maintenance of all life forms. It will be necessary to know the rates of CO2 use, oxygen evolution, and water flux through evapotranspiration by a crop stand under various environmental conditions, so that appropriate designs and control systems for maintaining mass balances of those gases can be achieved for a full range of environmental regimes. Mass budgets of gases will also enable evaluation of crop health by monitoring directly the rates of gas exchange and indirectly the rate of accumulation of dry matter, based on rates of carbon dioxide use. This article focuses on the unique capabilities of the NASA biomass production chamber for monitoring and evaluating gas exchange rates, with special emphasis on results with wheat and soybean, two candidate species identified by NASA for CELSS.
生命支持系统中环境控制的一个重要方面是对维持所有生命形式所需浓度的大气气体进行监测和调节（萨格尔等人，1988年）。有必要了解在各种环境条件下作物群体通过蒸散作用吸收二氧化碳、释放氧气和水分通量的速率，以便针对各种环境状况设计并实现适当的控制系统，维持这些气体的质量平衡。气体质量预算还能够通过直接监测气体交换速率以及基于二氧化碳吸收速率间接监测干物质积累速率来评估作物健康状况。本文重点介绍美国国家航空航天局生物质生产舱在监测和评估气体交换速率方面的独特能力，特别强调了以小麦和大豆作为研究对象所取得的结果，这两种作物是美国国家航空航天局为受控生态生命支持系统选定的候选物种。
