TY - CHAP
T1 - Plant chamber measurements
AU - Perez-Priego, Oscar
PY - 2021
Y1 - 2021
N2 - Enclosure-based techniques are widely used in physiological studies and largely constitute the foundation of our current understanding of the processes controlling the plant–soil–atmosphere gas exchange, such as photosynthesis, respiration, and evaporation. Back in the 1970s, chamber systems became highly developed to overcome the difficulties in integrating gas-exchange measurements from single leaves to obtain whole canopy estimates (whole plant or plant parts). The main principle of chamber-based measurements involves enclosures of a relatively large volume of air, so that the changes in the gas properties by diffusive processes can be continuously monitored over time. Typically, the basic components of a chamber system consist of an infrared gas analyzer, an air sampling circuit, the transparent enclosure, and a software-logging module to store and process data. Although a variety of types of enclosures and operating systems can be found, chamber fluxes can be subject to considerable uncertainties, making it fundamental to adapt appropriate error treatment protocols and flux calculation methods to improve the flux estimates. Accuracy and precision of the fluxes are largely determined by the degree of chamber disturbance. In addition to the more stable compounds, such as CO2, CH4 and water vapor, canopy chambers have been adapted to measure reactive trace gases (e. g., NO2, NO, O3, VOCs, HONO, HNO3, CH2O, etc.) with short lifetimes. In this chapter, we will provide a practical guide to the use of plant chambers and an elaborated discussion on basic considerations, including error treatment protocols and flux calculation procedures.
AB - Enclosure-based techniques are widely used in physiological studies and largely constitute the foundation of our current understanding of the processes controlling the plant–soil–atmosphere gas exchange, such as photosynthesis, respiration, and evaporation. Back in the 1970s, chamber systems became highly developed to overcome the difficulties in integrating gas-exchange measurements from single leaves to obtain whole canopy estimates (whole plant or plant parts). The main principle of chamber-based measurements involves enclosures of a relatively large volume of air, so that the changes in the gas properties by diffusive processes can be continuously monitored over time. Typically, the basic components of a chamber system consist of an infrared gas analyzer, an air sampling circuit, the transparent enclosure, and a software-logging module to store and process data. Although a variety of types of enclosures and operating systems can be found, chamber fluxes can be subject to considerable uncertainties, making it fundamental to adapt appropriate error treatment protocols and flux calculation methods to improve the flux estimates. Accuracy and precision of the fluxes are largely determined by the degree of chamber disturbance. In addition to the more stable compounds, such as CO2, CH4 and water vapor, canopy chambers have been adapted to measure reactive trace gases (e. g., NO2, NO, O3, VOCs, HONO, HNO3, CH2O, etc.) with short lifetimes. In this chapter, we will provide a practical guide to the use of plant chambers and an elaborated discussion on basic considerations, including error treatment protocols and flux calculation procedures.
KW - canopy chamber
KW - closed static chamber
KW - flux calculation
KW - open-top chamber
KW - plant chamber
KW - trace gas fluxes
KW - transient chamber
UR - http://www.scopus.com/inward/record.url?scp=85119068275&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-52171-4_59
DO - 10.1007/978-3-030-52171-4_59
M3 - Chapter
AN - SCOPUS:85119068275
SN - 9783030521707
T3 - Springer Handbooks
SP - 1585
EP - 1604
BT - Springer Handbook of Atmospheric Measurements
A2 - Foken, Thomas
PB - Springer, Springer Nature
CY - Cham, Switzerland
ER -