Article CC BY 4.0
refereed
published

Evaluation of calibrated passive sampling for quantifying ammonia emissions in multi-plot field trials with slurry application

Affiliation
Plant Nutrition and Crop Production, Faculty of Agricultural Sciences and Landscape Architecture, University of Applied Sciences Osnabrück, Osnabrück, Germany
ten Huf, Martin;
GND
1043869344
Affiliation
Institute of Crop Science and Plant Breeding, Grass and Forage Science/Organic Agriculture, Christian-Albrechts-University Kiel, Kiel, Germany
Reinsch, Thorsten;
Affiliation
Institute of Crop Science and Plant Breeding, Grass and Forage Science/Organic Agriculture, Christian-Albrechts-University Kiel, Kiel, Germany
Kluß, Christof;
GND
127017956X
Affiliation
Department Fertilization and Soil Matter Dynamics, Institute of Crop Science, University of Hohenheim, Stuttgart, Germany
Essich, Christoph;
GND
138033986
Affiliation
Department Fertilization and Soil Matter Dynamics, Institute of Crop Science, University of Hohenheim, Stuttgart, Germany
Ruser, Reiner;
GND
1108124615
ORCID
0000-0003-0540-4883
Affiliation
Thünen Institute of Climate-Smart Agriculture, Federal Research Institute for Rural Areas, Forestry and Fisheries, Braunschweig, Germany
Buchen-Tschiskale, Caroline;
GND
1018860924
ORCID
0000-0003-1615-5122
Affiliation
Thünen Institute of Climate-Smart Agriculture, Federal Research Institute for Rural Areas, Forestry and Fisheries, Braunschweig, Germany
Pacholski, Andreas;
GND
1018952160
Affiliation
Thünen Institute of Climate-Smart Agriculture, Federal Research Institute for Rural Areas, Forestry and Fisheries, Braunschweig, Germany
Flessa, Heinz;
GND
172294274
Affiliation
Plant Nutrition and Crop Production, Faculty of Agricultural Sciences and Landscape Architecture, University of Applied Sciences Osnabrück, Osnabrück, Germany
Olfs, Hans-Werner

Background: There is a great need for simple and inexpensive methods to quantify ammonia emissions in multi-plot field trials. However, methods that meet these criteria have to be thoroughly validated. In the calibrated passive sampling approach, acid traps placed in the center of quadratic plots absorb ammonia, enabling relative comparisons between plots. To quantify ammonia emissions, these acid trap samplings are scaled by means of a transfer coefficient (TC) obtained from simultaneous measurements with the dynamic tube method (DTM). However, dynamic tube measurements are also comparatively costly and time-consuming. Aims: Our objective was to assess the best practice for using calibrated passive sampling in multi-plot field trials. One particular challenge in such experiments is to evaluate the influence of ammonia drift between plots. Methods: In a series of eight multi-plot field trials, acid traps and DTM were used simultaneously on all plots to measure ammonia emissions caused by different slurry application techniques. Data obtained by both methods were correlated, and the influence of the ubiquitous ammonia background on both methods was evaluated by comparing net values, including the subtraction of the background with gross values (no background subtraction). Finally, we provide recommendations for calculating a TC for calibrating relative differences between plots, based on simultaneous acid trap and dynamic tube measurements on selected plots. Results: Treatment mean values obtained by both methods correlated well. For most field trials, R2 values between 0.6 and 0.8 were obtained. Ammonia background concentrations affected both methods. Drift between plots contributed to the background for the acid traps, whereas the contamination of the chamber system might have caused the background for the DTM. Treatments with low emissions were comparatively more affected by that background. Conclusion: For a robust application of calibrated passive sampling, we recommend calculating the TC based on a treatment with high ammonia emissions, reducing the relative influence of the ubiquitous ammonia background.

Preview

Cite

Citation style:
Could not load citation form.

Access Statistic

Total:
Downloads:
Abtractviews:
Last 12 Month:
Downloads:
Abtractviews:

Rights

Use and reproduction: