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IJRSP Vol.35(3) [June 2006] >

Title: Monitoring and controlling of CO₂ concentrations in open top chambers for better understanding of plants response to elevated CO2 levels
Authors: Vanaja, M
Maheswari, M
Ratnakumar, P
Ramakrishna, Y S
Keywords: Elevated CO2
Open top chamber
Instrumentation and technology
Issue Date: Jun-2006
Publisher: CSIR
Abstract: The exponentially rising concentration of CO₂ in the atmosphere is one of the important changes, which effectively influences the productivity of agricultural crops. Innovative approaches for conducting long-term experiments on plants have been developed to investigate the growth and yield response of different plants to predicted elevated levels of CO₂. The accuracy of the results depends on the system adopted and its maintenance of the desired CO₂ levels with near natural conditions for other parameters. In one of such efforts, a system for continuous monitoring and maintaining the desired level of CO₂, temperature and relative humidity in open top chambers (OTCs) was developed. Carbon dioxide gas was supplied to the chambers and maintained at set levels using manifold gas regulators, pressure pipelines, solenoid valves, rotameters, sampler, pump, CO₂ analyzer, PC linked Program Logic Control (PLC) and Supervisory Control And Data Acquisition (SCADA). These OTCs are cost effective for meeting the requirements of field research on CO₂ enrichment.
Page(s): 193-197
ISSN: 0367-8393
Source:IJRSP Vol.35(3) [June 2006]

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