Through-flow chamber CO2/H2O canopy gas exchange system—Construction, microclimate, errors, and measurements in a barley (Hordeum vulgare L.) field

Müller, Johannes; Eschenröder, André; Diepenbrock, W.

doi:10.1016/j.agrformet.2008.08.007

Cited by 31 publications

(17 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The increasing temperature significantly influences the length of the effective measurement and the quality of the measured data [32,33]. In canopy photosynthetic measurements using assimilation chambers without cooling means, the length of the measuring time was only 3 min and the effective measurement time was shorter.…”

Section: Canopy Photosynthetic Measurement Systemmentioning

confidence: 99%

Canopy and leaf gas exchange of Haloxylon ammodendron under different soil moisture regimes

Gao

Yan

et al. 2010

Sci. China Life Sci.

View full text Add to dashboard Cite

In order to reveal the drought resistance and adaptation of the C(4) desert plant Haloxylon ammodendron under artificially controlled soil moisture regimes, representative plants were selected to measure canopy photosynthesis using canopy photosynthetic measurement system. The results showed that appropriate soil moisture significantly enhances the canopy and leaf photosynthetic capacity, and extremely high soil moisture is not conducive to the photosynthesis of H. ammodendron.

show abstract

Section: Canopy Photosynthetic Measurement Systemmentioning

confidence: 99%

Canopy and leaf gas exchange of Haloxylon ammodendron under different soil moisture regimes

Gao

Yan

et al. 2010

Sci. China Life Sci.

View full text Add to dashboard Cite

show abstract

“…Furthermore, the application of a venting tube on the chamber wall can help to balance the pressure between the inside and outside of the chamber (Savage & Davidson 2003). On the other hand, other systems based on air and microclimate conditioning have been tested to reduce the chamber effects, but these systems lack portability (Medhurst et al 2006, Muller et al 2009). …”

Section: Introductionmentioning

confidence: 99%

“…The choice of adequate wall material (Muller et al 2009) and the use of nonsteady state operating for short periods (Steduto et al 2002), can limit the chamber effects due to walls, although longer periods of measurements seems to increase the confidence of the measurements (Pé-rez-Priego et al 2015). Furthermore, the application of a venting tube on the chamber wall can help to balance the pressure between the inside and outside of the chamber (Savage & Davidson 2003).…”

Section: Introductionmentioning

confidence: 99%

“…In the literature, a variety of chambers can be found with different configurations designed to respond to specific requirements such as: different ecosystem types and environments (e.g., croplands, grasslands, orchards, forest understories - Steduto et al 2002, Heijmans et al 2004, Pé-rez-Priego et al 2010, needs to modify the microclimatic conditions inside the chamber (Medhurst et al 2006), and the accessibility of measurement areas (Muller et al 2009). …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Canopy Chamber: a useful tool to monitor the CO2 exchange dynamics of shrubland

Guidolotti¹,

Dato²,

Liberati³

et al. 2017

iForest

View full text Add to dashboard Cite

A transient state canopy-chamber was developed to monitor CO2 exchange of shrubland ecosystems. The chamber covered 0.64 m 2 and it was modular with a variable height. Several tests were carried out to check the potential errors in the flux estimates due to leakages and the environment modifications during the measurements inside the chamber. The laboratory leakages test showed an error below 1% of the flux; the temperature increases inside the chamber were below 1.3 °C at different light intensity and small pressure changes. The radial blowers inside the chamber created different wind speed at different chamber height, with faster speed at the top of the chamber and the minimum wind speed that was recorded at soil level, preventing detectable effects on soil CO2 emission rates. Moreover, the chamber was tested for two years in a semi-arid Mediterranean garrigue, identifying a strong seasonality of CO2 fluxes with the highest rates during spring and lowest rates recorded during the hot dry non-vegetative summer.

show abstract

“…Some common ET measurement methods include lysimeters, eddy covariance, Bowen ratio, soil water balance, and sap flow (Allen et al 2011). ET is sometimes measured by open or closed chamber methods, which involve monitoring the changes in humidity inside a usually portable chamber over the crop canopy (Dugas et al 1997;McLeod et al 2004;Balogh et al 2007;Burkart et al 2007;Centinari et al 2009;Mueller et al 2009;Teitel et al 2011;Langensiepen et al 2012). Usually, ET is estimated by theoretical models that rely on weather measurements, such as the PenmanMonteith equation (Monteith 1965).…”

Section: Introductionmentioning

confidence: 99%

A comparative study of the water budgets of lawns under three management scenarios

Bijoor

Pataki

Haver³

et al. 2014

Urban Ecosyst

View full text Add to dashboard Cite

The fate of irrigation in urban ecosystems is highly uncertain, due to uncertainties in urban ecohydrology. We compared irrigation rates, soil moisture, evapotranspiration (ET), stomatal conductance, and water budgets of landscape ecosystems managed with different turfgrass species and irrigation technologies. The "Typical" landscape had a cool-season fescue and was irrigated by an automatic timer. The "Alternative1" landscape had a warmseason paspalum and a "smart" soil moisture sensor-based irrigation system. The "Alternative2" landscape had a cool-season native sedge and a "smart" weather station-based drip irrigation system. ET was measured with a portable closed chamber and modeled using a Penman-Monteith approach, and the two methods agreed well. The water applied to the Alternative1 was 54 % less than the water applied to the Typical landscape, and the water applied to the Alternative2 was 24 % less. Soil moisture was similar in the Typical and Alternative2, while Alternative1 was drier in spring. The stomatal conductance of sedge was lower than the other two species, but its ET was not lower due to higher leaf area. Irrigation efficiencies (ET/applied irrigation) were 57 -58 %, 86 -97 %, and 78 -80 % for the Typical, Alternative1, and Alternative2 landscapes, respectively. Runoff was less than 2 % in each landscape, and excess irrigation primarily drained below the root zone. Differences in irrigation efficiency between landscapes were due mainly to irrigation application, which varied more than species water use. Smart irrigation systems provided substantial water savings relative to a timer-based system, and prevented significant drainage losses. The utilization of smart sensors was more important than the choice of turfgrass species for irrigation efficiency.

show abstract

Through-flow chamber CO2/H2O canopy gas exchange system—Construction, microclimate, errors, and measurements in a barley (Hordeum vulgare L.) field

Cited by 31 publications

References 41 publications

Canopy and leaf gas exchange of Haloxylon ammodendron under different soil moisture regimes

Canopy and leaf gas exchange of Haloxylon ammodendron under different soil moisture regimes

Canopy Chamber: a useful tool to monitor the CO2 exchange dynamics of shrubland

A comparative study of the water budgets of lawns under three management scenarios

Contact Info

Product

Resources

About