Effects of cattle-slurry treatment by acidification and separation on nitrogen dynamics and global warming potential after surface application to an acidic soil

Fangueiro, David; Pereira, José; Bichana, A.; Surgy, S.; Cabral, F. M.; Coutinho, João

doi:10.1016/j.jenvman.2015.07.032

Cited by 37 publications

(28 citation statements)

References 26 publications

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“…Acidification to a pH of <6.0 reduced NH 3 volatilization to <2.0% of the total N applied (AD and AD+NI plots), a similar reduction to that reported by other authors when non-acidified digestate or slurries were injected into the soil (Fangueiro et al, 2015b;Riva et al, 2016;Baral et al, 2017). These values were significantly lower than when the digestate was not acidified (D and D+NI), resulting in NH 3 losses of more than 27% of the total applied N ( Table 4).…”

Section: Nitrogen Losses: Acidification and Nitrification Inhibitorssupporting

confidence: 85%

“…Therefore, we do not discard that denitrification was, in part, responsible of some N 2 O emissions observed after digestate application ( Figure S3), although the initial NO lower (Figures 1E,F) than in a previous study by Fangueiro et al (2015b) where high soil NO − 3 -N content (c. 80 mg kg −1 ) resulted in significant N 2 O emissions. In addition, hot spots where both nitrification and denitrification processes occur are created in soil after the addition of organic manures, including even when bulk WFPS is below 50%, resulting in N 2 O emissions (MarkFoged et al, 2011;Zhu et al, 2015).…”

Section: Nitrogen Losses: Acidification and Nitrification Inhibitorsmentioning

confidence: 61%

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Advanced Processing of Food Waste Based Digestate for Mitigating Nitrogen Losses in a Winter Wheat Crop

Sánchez‐Rodríguez

Carswell

Shaw

et al. 2018

Front. Sustain. Food Syst.

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The anaerobic digestion of food waste converts waste products into "green" energy. Additionally, the secondary product from this process is a nutrient-rich digestate, which could provide a viable alternative to synthetically-produced fertilizers. However, like fertilizers, digestate applied to agricultural land can be susceptible to both ammonia (NH 3 ) and nitrous oxide (N 2 O) losses, having negative environmental impacts, and reducing the amount of N available for crop uptake. Our main aim was to assess potential methods for mitigating N losses from digestate applied to a winter wheat crop and subsequent impact on yield. Plot experiments were conducted at two UK sites, England (North Wyke-NW) and Wales (Henfaes-HF), to assess NH 3 and N 2 O losses, yield and N offtake following a single band-spread digestate application. Treatments examined were digestate (D), acidified-digestate (AD), digestate with the nitrification inhibitor DMPP (D+NI), AD with DMPP (AD+NI), and a zero-N control (C). Ammonium nitrate (NH 4 NO 3 ) fertilizer N response plots (from 75 to 300 kg N ha −1 ) were included to compare yields with the organic N source. Across both sites, cumulative NH 3 -N losses were 27.6% from D and D+NI plots and 1.5% for AD and AD+NI of the total N applied, a significant reduction of 95% with acidification. Cumulative N 2 O losses varied between 0.13 and 0.35% of the total N applied and were reduced by 50% with the use of DMPP although the differences were not significant. Grain yields for the digestate treatments were 7.52-9.21 and 7.23-9.23 t DM ha −1 at HF and NW, respectively. Yields were greater from the plots receiving acidified-digestate relative to the non-acidified treatments but the differences were not significant. The yields obtained for the digestate treatments ranged between 84.2% (D+NI) and 103.6% (D) of the yields produced by the same N rate from an inorganic source at HF. Advanced processing of digestate reduced N losses providing an environmentally sound option for N management.

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Section: Nitrogen Losses: Acidification and Nitrification Inhibitorssupporting

confidence: 85%

Section: Nitrogen Losses: Acidification and Nitrification Inhibitorsmentioning

confidence: 61%

Advanced Processing of Food Waste Based Digestate for Mitigating Nitrogen Losses in a Winter Wheat Crop

Sánchez‐Rodríguez

Carswell

Shaw

et al. 2018

Front. Sustain. Food Syst.

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“…Above-normal precipitation in August 2009 may have increased NO 3 -N leaching from the surface to the 30-to 60-cm depths. Because NH 4 -N is quickly oxidized to NO 3 -N after manure application Bechini and Marino, 2009;Fangueiro et al, 2012Fangueiro et al, , 2014Fangueiro et al, , 2015, the high NH 4 -N content in ADM (20 times the values in CM and 41 times the values in SS), combined with its 95% water content, favored NH 4 -N oxidation to NO 3 -N and increased the NO 3 -N leaching potential more than soil receiving CM or SS. The higher residual NO 3 -N in the soil in Year 4 (2011) probably resulted from low precipitation that growing season combined with a later seeding date, which limited NO 3 -N uptake by barley.…”

Section: Olsen-phosphorusmentioning

confidence: 99%

Agronomic Values of Anaerobically Digested Cattle Manure and the Separated Solids for Barley Forage Production

Hao

Thomas

Nelson

et al. 2016

Soil Science Soc of Amer J

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As biogas production expands, digestates from that industry are increasingly available as potential nutrient sources for crop production, but their agronomic value is poorly understood. Thus, a 5-yr field experiment was conducted to determine the agronomic values of anaerobically digested solid beef cattle feedlot manure (ADM) and the separated solids (SS) from ADM under a semiarid reduced-tillage dryland barley (Hordeum vulgare L.) forage cropping system. Three organic amendments, ADM, SS, and undigested solid beef cattle feedlot manure (CM), were applied annually at 200 or 400 kg total N ha −1 for 4 yr, while the residual effect was examined in the fifth year. The higher N and P availability in ADM translated into greater barley forage yields, total N uptake, amendment-derived N uptake, and apparent N recovery (ANR) from ADM-amended soil than SS-and CM-amended soils, while there were no significant differences between soils receiving SS or CM. The ANR was 22% for ADM but only 12% for CM and 9% for SS. In contrast, P uptake, the fraction of amendment-derived P uptake, and apparent P recovery were similar among all amendments. Similar yields, ANR, post-harvest soil NH 4 , NO 3 , and Olsen-P concentrations between SS-and CM-amended soils suggest that they have a comparable agronomic value. Less residual Olsen-P in soil receiving ADM than SS or CM suggests that ADM is a lower risk for P accumulation when applied at N-based rates. We recommend that current agronomic values for cattle feedlot manure could be applied to SS but not ADM.

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“…The simple way to minimize NH 3 and additional N 2 O emission is to create conditions that minimize the concentration of NH 3 relative to those of NH 4 + , specifically by lowering slurry pH, a process that has been developed, widely tested and recently reviewed [ 3 ]. The positive effects of slurry acidification in reducing NH 3 and N 2 O emissions [ 13 ] as well as on field crop yields [ 14 – 16 ] have been widely reported. However, acids are highly corrosive and hazardous to use, unless diluted with water.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, spreading of acidified slurry on soil will increase soil acidification, and chemical scorching of crops following application of slurries containing nitric acid have been reported. A recent review by Fanguerio et al [ 13 ] revealed that the effects of slurry acidification on the mineral fertilizer equivalent (MFE) varied significantly in several studies. As such, there is a need to improve our understanding of the implications of increasing the use efficiencies of manure N, and mitigating NH 3 and N 2 O emissions and nitrate leaching, in order to achieve global targets.…”

Section: Introductionmentioning

confidence: 99%

Acidification of pig slurry effects on ammonia and nitrous oxide emissions, nitrate leaching, and perennial ryegrass regrowth as estimated by 15N-urea flux

Park

Lee

Jung

et al. 2018

Asian-Australas J Anim Sci

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ObjectiveThe present study aimed to assess the nitrogen (N) use efficiency of acidified pig slurry for regrowth yield and its environmental impacts on perennial ryegrass swards.MethodsThe pH of digested pig slurry was adjusted to 5.0 or 7.0 by the addition of sulfuric acid and untreated as a control. The pig slurry urea of each treatment was labeled with 15N urea and applied at a rate of 200 kg N/ha immediately after cutting. Soil and herbage samples were collected at 7, 14, and 56 d of regrowth. The flux of pig slurry-N to regrowth yield and soil N mineralization were analyzed, and N losses via NH3, N2O emission and NO3− leaching were also estimated.ResultsThe pH level of the applied slurry did not have a significant effect on herbage yield or N content of herbage at the end of regrowth, whereas the amount of N derived from pig slurry urea (NdfSU) was higher in both herbage and soils in pH-controlled plots. The NH4+-N content and the amount of N derived from slurry urea into soil NH4+ fraction (NdfSU-NH4+) was significantly higher in in the pH 5 plot, whereas NO3− and NdfSU-NO3− were lower than in control plots over the entire regrowth period. Nitrification of NH4+-N was delayed in soil amended with acidified slurry. Compared to non-pH-controlled pig slurry (i.e. control plots), application of acidified slurry reduced NH3 emissions by 78.1%, N2O emissions by 78.9% and NO3− leaching by 17.81% over the course of the experiment.ConclusionOur results suggest that pig slurry acidification may represent an effective means of minimizing hazardous environmental impacts without depressing regrowth yield.

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Effects of cattle-slurry treatment by acidification and separation on nitrogen dynamics and global warming potential after surface application to an acidic soil

Cited by 37 publications

References 26 publications

Advanced Processing of Food Waste Based Digestate for Mitigating Nitrogen Losses in a Winter Wheat Crop

Advanced Processing of Food Waste Based Digestate for Mitigating Nitrogen Losses in a Winter Wheat Crop

Agronomic Values of Anaerobically Digested Cattle Manure and the Separated Solids for Barley Forage Production

Acidification of pig slurry effects on ammonia and nitrous oxide emissions, nitrate leaching, and perennial ryegrass regrowth as estimated by 15N-urea flux

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