Impact of cattle slurry application methods on ammonia losses and grassland nitrogen use efficiency

Nyameasem, John Kormla; Zutz, Mareike; Kluß, Christof; Huf, Martin ten; Essich, Christoph; Buchen‐Tschiskale, Caroline; Ruser, Reiner; Flessa, Heinz; Olfs, Hans‐Werner; Taube, F.; Reinsch, Thorsten

doi:10.1016/j.envpol.2022.120302

Cited by 11 publications

(7 citation statements)

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“…Maize silage yields were assumed to increase by 5 % [ 32 ], and grassland forage yields by 30 % [ 33 , 73 ], while total applied N amounts were assumed to remain the same as in the reference scenario ( Table 1 ). NH 3 and N 2 O reduction levels were derived from Nyameasem, Zutz et al [ 29 ] and Emmerling, Krein et al [ 30 ], respectively, while the percentage reduction of N leaching [ 31 ] was considered for forage of which Ecovinvent provided data on leaching, i.e. maize silage, alfalfa silage and grass silage.…”

Section: Methodsmentioning

confidence: 99%

“…Slurry treatment with sulfuric acid can reduce NH 3 , N 2 O and CH 4 emissions during land application by decreasing the slurry pH [ 8 , 29 , 30 ] and decreasing N leaching [ 31 , 32 ], thereby increasing the availability of nutrients for plants and yields [ 32 , 33 ]. Current Danish legislation prescribes the addition of 3 kg of sulfuric acid per m³ of cattle slurry to ensure a minimum NH 3 reduction of 25 % [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

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Modeling the environmental impacts of Asparagopsis as feed, a cow toilet and slurry acidification in two synthetic dairy farms

Méité,

Bayer,

Martin

et al. 2024

Heliyon

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling the environmental impacts of Asparagopsis as feed, a cow toilet and slurry acidification in two synthetic dairy farms

Méité,

Bayer,

Martin

et al. 2024

Heliyon

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“…The NH 3 mitigation potential was defined as the relative reduction of NH 3 emissions in a plot with optimized application technique compared to the average NH 3 emissions in the TH treatment with the corresponding type of liquid organic fertilizer (CS or BD). It was calculated according to Equation (3) [38]:…”

Section: Analyses Of Variance (Anova)mentioning

confidence: 99%

Effects of Liquid Manure Application Techniques on Ammonia Emission and Winter Wheat Yield

et al. 2023

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Ammonia emissions following liquid manure application impair human health and threaten natural ecosystems. In growing arable crops, where immediate soil incorporation of the applied liquid manure is not possible, best-available application techniques are required in order to decrease ammonia losses. We determined ammonia emission, crop yield and nitrogen uptake of winter wheat in eight experimental sites across Germany. Each individual experiment consisted of an unfertilized control (N0), broadcast calcium ammonium nitrate (CAN) application as well as four different techniques to apply cattle slurry (CS) and biogas digestate (BD). Fertilizer was applied to growing winter wheat at a total rate of 170 kg N ha−1 split into two equal dressings. The following application techniques were tested for both liquid manure types: (i) trailing hose (TH) application using untreated and (ii) acidified (~pH 6) liquid manure (+A), as well as (iii) a combination of open slot injection (SI) for the first dressing and trailing shoe (TS) application for the second dressing without and (iv) with the addition of a nitrification inhibitor (NI) for the first dressing. The highest ammonia emissions (on average 30 kg N ha−1) occurred following TH application of BD. TH application of CS led to significantly lower emissions (on average 19 kg N ha−1). Overall, acidification reduced ammonia emissions by 64% compared to TH application without acidification for both types of liquid manures. On average, the combination of SI and TS application resulted in 23% lower NH3 emissions in comparison to TH application (25% for the first application by SI and 20% for the second application by TS). Supplementing an NI did not affect ammonia emissions. However, decreasing ammonia emissions by acidification or SI did not increase winter wheat yield and nitrogen uptake. All organically fertilized treatments led to similar crop yield (approx. 7 t ha−1 grain dry matter yield) and above-ground biomass nitrogen uptake (approx. 150 kg ha−1). Yield (8 t ha−1) and nitrogen uptake (approx. 190 kg ha−1) were significantly higher for the CAN treatment; while for the control, yield (approx. 4.5 t ha−1) and above-ground biomass nitrogen uptake (approx. 90 kg ha−1) were significantly lower. Overall, our results show that reducing NH3 emissions following liquid manure application to growing crops is possible by using different mitigation techniques. For our field trial series, acidification was the technique with the greatest NH3 mitigation potential.

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“…Overall, ten consecutive measurements were carried out, and the NH3 concentration, as well as the required pump strokes of each measurement, were noted. [24]. Immediately after slurry application, the chamber system was placed on the slurry-covered soil surface, and a DTM measurement was performed.…”

Section: Constancy Of the Nh3 Concentration Within The Chamber Systemmentioning

confidence: 99%

“…These acid traps are placed in each plot of a field experiment to collect NH 3 to assess relative differences between plots, while the wind speed corrected DTM is used on a few selected plots to scale those relative differences [12]. This approach was used in a wide range of experiments in Germany [4,[23][24][25][26][27] and Denmark [28].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Dynamic Tube Method for Measuring Ammonia Emissions after Liquid Manure Application

Huf

Olfs

2023

Agriculture

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Easy and inexpensive methods for measuring ammonia emissions in multi-plot field trials allow the comparison of several treatments with liquid manure application. One approach that might be suitable under these conditions is the dynamic tube method (DTM). Applying the DTM, a mobile chamber system is placed on the soil surface, and the air volume within is exchanged at a constant rate for approx. 90 s. with an automated pump. This procedure is assumed to achieve an equilibrium ammonia concentration within the system. Subsequently, a measurement is performed using an ammonia-sensitive detector tube. Ammonia fluxes are calculated based on an empirical model that also takes into account the background ammonia concentration measured on unfertilized control plots. Between measurements on different plots, the chamber system is flushed with ambient air and cleaned with paper towels to minimize contamination with ammonia. The aim of this study was to determine important prerequisites and boundary conditions for the application of the DTM. We conducted a laboratory experiment to test if the ammonia concentration remains stable while performing a measurement. Furthermore, we investigated the cleaning procedure and the effect of potential ammonia carryover on cumulated emissions under field conditions following liquid manure application. The laboratory experiment indicated that the premeasurement phase to ensure a constant ammonia concentration is not sufficient. The concentration only stabilized after performing more than 100 pump strokes, with 20 pump strokes (lasting approximately 90 s) being the recommendation. However, the duration of performing a measurement can vary substantially, and linear conversion accounts for those differences, so a stable concentration is mandatory. Further experiments showed that the cleaning procedure is not sufficient under field conditions. Thirty minutes after performing measurements on high emitting plots, which resulted in an ammonia concentration of approx. 10 ppm in the chamber, we detected a residual concentration of 2 ppm. This contamination may affect measurements on plots with liquid manure application as well as on untreated control plots. In a field experiment with trailing hose application of liquid manure, we subsequently demonstrated that the calculation of cumulative ammonia emissions can vary by a factor of three, depending on the degree of chamber system contamination when measuring control plots. When the ammonia background values were determined by an uncontaminated chamber system that was used to measure only control plots, cumulative ammonia emissions were approximately 9 kg NH3-N ha−1. However, when ammonia background values were determined using the contaminated chamber system that was also used to measure on plots with liquid manure application, the calculation of cumulative ammonia losses indicated approximately 3 kg NH3-N ha−1. Based on these results, it can be concluded that a new empirical DTM calibration is needed for multi-plot field experiments with high-emitting treatments.

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Impact of cattle slurry application methods on ammonia losses and grassland nitrogen use efficiency

Cited by 11 publications

References 54 publications

Modeling the environmental impacts of Asparagopsis as feed, a cow toilet and slurry acidification in two synthetic dairy farms

Modeling the environmental impacts of Asparagopsis as feed, a cow toilet and slurry acidification in two synthetic dairy farms

Effects of Liquid Manure Application Techniques on Ammonia Emission and Winter Wheat Yield

Evaluation of the Dynamic Tube Method for Measuring Ammonia Emissions after Liquid Manure Application

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