Does manure management affect the latent greenhouse gas emitting potential of livestock manures?

Pratt, Chris; Redding, Matthew; Hill, Jaye; Jensen, Paul D.

doi:10.1016/j.wasman.2015.08.019

Cited by 19 publications

(10 citation statements)

References 50 publications

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“…We targeted manures from Australia's key intensive livestock industries: beef (feedlot pen surface), pork (spent litter), broiler poultry (spent litter), and poultry layer (fresh manure). Details of these manures were reported in Pratt et al (2015), with the beef feedlot accessed here referred to as "Feedlot 1" in that paper.…”

Section: Manure Collection and Preparationmentioning

confidence: 99%

Clays Can Decrease Gaseous Nutrient Losses from Soil-Applied Livestock Manures

Pratt¹,

Redding²,

Hill³

et al. 2016

J. Environ. Qual.

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Clays could underpin a viable agricultural greenhouse gas (GHG) abatement technology given their affinity for nitrogen and carbon compounds. We provide the first investigation into the efficacy of clays to decrease agricultural nitrogen GHG emissions (i.e., NO and NH). Via laboratory experiments using an automated closed-vessel analysis system, we tested the capacity of two clays (vermiculite and bentonite) to decrease NO and NH emissions and organic carbon losses from livestock manures (beef, pig, poultry, and egg layer) incorporated into an agricultural soil. Clay addition levels varied, with a maximum of 1:1 to manure (dry weight). Cumulative gas emissions were modeled using the biological logistic function, with 15 of 16 treatments successfully fitted ( < 0.05) by this model. When assessing all of the manures together, NH emissions were lower (×2) at the highest clay addition level compared with no clay addition, but this difference was not significant ( = 0.17). Nitrous oxide emissions were significantly lower (×3; < 0.05) at the highest clay addition level compared with no clay addition. When assessing manures individually, we observed generally decreasing trends in NH and NO emissions with increasing clay addition, albeit with widely varying statistical significance between manure types. Most of the treatments also showed strong evidence of increased C retention with increasing clay additions, with up to 10 times more carbon retained in treatments containing clay compared with treatments containing no clay. This preliminary assessment of the efficacy of clays to mitigate agricultural GHG emissions indicates strong promise.

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Section: Manure Collection and Preparationmentioning

confidence: 99%

Clays Can Decrease Gaseous Nutrient Losses from Soil-Applied Livestock Manures

Pratt¹,

Redding²,

Hill³

et al. 2016

J. Environ. Qual.

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“…beef feedlot pen surface, fresh piggery litter, broiler poultry litter and fresh poultry layer manure. Specific details of farms accessed and manure collection are given in earlier published work (Pratt et al 2015a).…”

Section: Manure Collection and Preparationmentioning

confidence: 99%

A novel and effective technology for mitigating nitrous oxide emissions from land-applied manures

Hill¹,

Redding²,

Pratt³

2016

Anim. Prod. Sci.

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Abstract. Land-applied manures produce nitrous oxide (N 2 O), a greenhouse gas (GHG). Land application can also result in ammonia (NH 3 ) volatilisation, leading to indirect N 2 O emissions. Here, we summarise a glasshouse investigation into the potential for vermiculite, a clay with a high cation exchange capacity, to decrease N 2 O emissions from livestock manures (beef, pig, broiler, layer), as well as urea, applied to soils. Our hypothesis is that clays adsorb ammonium, thereby suppressing NH 3 volatilisation and slowing N 2 O emission processes. We previously demonstrated the ability of clays to decrease emissions at the laboratory scale. In this glasshouse work, manure and urea application rates varied between 50 and 150 kg nitrogen (N)/ha. Clay : manure ratios ranged from 1 : 10 to 1 : 1 (dry weight basis). In the 1-year trial, the abovementioned N sources were incorporated with vermiculite in 1 L pots containing Sodosol and Ferrosol growing a model pasture (Pennisetum clandestinum or kikuyu grass). Gas emissions were measured periodically by placing the pots in gastight bags connected to real-time continuous gas analysers. The vermiculite achieved significant (P 0.05) and substantial decreases in N 2 O emissions across all N sources (70% on average). We are currently testing the technology at the field scale; which is showing promising emission decreases (~50%) as well as increases (~20%) in dry matter yields. This technology clearly has merit as an effective GHG mitigation strategy, with potential associated agronomic benefits, although it needs to be verified by a cost-benefit analysis.

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“…Methane emission from other ruminants, such as swine and horses, is generally low (Yusuf et al 2012). Pratt et al (2015) stated that manure management is one of the main sources of agricultural GHG, while O'Mara (2011) estimated that around 10% of the emission is from on-farm emissions. Methane from manure is produced during anaerobic decomposition of the organic matter present in faecal matter and bedding material.…”

Section: Introductionmentioning

confidence: 99%

Artificial Intelligence Projection Model for Methane Emission from Livestock in Sarawak

Peng

Malek²,

Shamsuddin

2019

JSM

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Artificial Intelligence is a topical trend employed to solve engineering and industrial problems by virtue of its abilities to deal with data uncertainty such as methane emissions. Hard computing methods are not suitable for determining the optimal emission in a methane emission data set. Instead, soft computing solutions should be considered in an effort to obtain better optimal solutions for industrial problems. This paper utilized the Guidelines provided in the 2006 Intergovernmental Panel on Climate Change (IPCC) to calculate and project methane emissions from selected six livestock in Sarawak, Malaysia. A particle swarm optimization (PSO) model was developed to project future methane emission by using number of livestock as the input parameter. The total CH 4 inventory from the enteric fermentation of cattle, buffaloes, goats, sheep, swine and deer in Sarawak decreased from 1.860 to 1.856 Gg when calculation was carried out using the Tier 1 method. This decrease was due to population growth and the emission factors employed. Three statistical measures, root mean square error (RMSE), mean absolute error (MAE), and mean absolute percentage error (MAPE) were employed for evaluation. PSO has been shown to be able to give an accurate projection. The results of this study provide a benchmark information which can be used by the Sarawak government to develop appropriate policies and mitigation strategies to reduce future carbon footprint in the Sarawak livestock sector.

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Does manure management affect the latent greenhouse gas emitting potential of livestock manures?

Cited by 19 publications

References 50 publications

Clays Can Decrease Gaseous Nutrient Losses from Soil-Applied Livestock Manures

Clays Can Decrease Gaseous Nutrient Losses from Soil-Applied Livestock Manures

A novel and effective technology for mitigating nitrous oxide emissions from land-applied manures

Artificial Intelligence Projection Model for Methane Emission from Livestock in Sarawak

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