Impact of biochar enriched with dairy manure effluent on carbon and nitrogen dynamics
Abstract
Amending soils with biochar can have multiple environmental benefits, including improvement in soil physicochemical properties, carbon sequestration, reduction in leaching losses of essential nutrients, and reduction in greenhouse gas (GHG) emissions. This study was conducted to determine the effect of enriched biochar amendments on leaching losses of essential nutrients and GHG emissions from soil. The enriched biochar was prepared by shaking biochar with dairy manure effluent for 24 h, which increased the C and N concentration of biochar by 9.3 and 8.3%, respectively. Incubation and leaching experiments were conducted for 8 wk with three treatments: soil, soil + 1% biochar, and soil + 1% enriched biochar. Amendment with biochar and enriched biochar relative to unamended soil resulted in 68 and 75% reduction in net nitrification, 221 and 229% reduction in net ammonification, 67 and 68% reduction in cumulative CO flux, respectively, and 26% reduction in cumulative NO flux for both biochar treatments. There were no significant differences among treatments in total leaching losses of C, N, and base cations. Our findings suggest that enrichment of biochar with dairy manure effluent can promote C and N storage in soil and provide additional environmental benefits.
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Enriching biochar with N did not alter the N2O flux.
“However, enriching biochar with N did not alter the N 2 O flux”
From A Review of Biochar and Soil Nitrogen Dynamics (2013) · cites this paper as [84]
In an 8-week incubation, unamended biochar reduced net nitrification by 68%.
“When the unamended and N enriched biochars were added to the soil in an 8 week incubation experiment, reductions in net nitrification were 68% and 75%, respectively”
From A Review of Biochar and Soil Nitrogen Dynamics (2013) · cites this paper as [84]
In an 8-week incubation, N-enriched biochar reduced net nitrification by 75%.
“When the unamended and N enriched biochars were added to the soil in an 8 week incubation experiment, reductions in net nitrification were 68% and 75%, respectively”
From A Review of Biochar and Soil Nitrogen Dynamics (2013) · cites this paper as [84]
N-enriched biochar could be used as a slow release N fertilizer.
“Sarkhot et al. [84] thus concluded that N enriched biochar could be used as a slow release N fertilizer.”
From A Review of Biochar and Soil Nitrogen Dynamics (2013) · cites this paper as [84]
In an 8-week incubation, unamended biochar reduced net ammonification rates by 221%.
“while net ammonification rates were reduced by 221% and 229%, respectively.”
From A Review of Biochar and Soil Nitrogen Dynamics (2013) · cites this paper as [84]
Biochar treatments averaged a 26% reduction in N2O flux.
“which averaged a 26% reduction in the biochar treatments [84].”
From A Review of Biochar and Soil Nitrogen Dynamics (2013) · cites this paper as [84]
Mixing biochar with filtered liquid dairy manure increased the biochar's N content by 8.3%.
“Sarkhot et al. [84] mixed biochar with filtered liquid dairy manure, by shaking the mixture for 24 h and then oven drying the biochar, which increased the biochar's N content by 8.3%.”
From A Review of Biochar and Soil Nitrogen Dynamics (2013) · cites this paper as [84]
In an 8-week incubation, N-enriched biochar reduced net ammonification rates by 229%.
“while net ammonification rates were reduced by 221% and 229%, respectively.”
From A Review of Biochar and Soil Nitrogen Dynamics (2013) · cites this paper as [84]
The reductions in nitrification and ammonification were interpreted as being due to adsorption processes rather than enhanced immobilisation.
“These results were interpreted as being due to adsorption processes rather than enhanced immobilisation, since CO 2 fluxes were also lower under biochar treatments.”
From A Review of Biochar and Soil Nitrogen Dynamics (2013) · cites this paper as [84]
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References 36 · Cited by 132
- Authors
- Sarkhot, D. V., Berhe, A. A., & Ghezzehei, T. A.
- Affiliations
- University of California, Merced (US)
- Corresponding author
- Berhe, Asmeret Asefaw
- Venue
- Journal of Environmental Quality
- Publisher
- Wiley
- Published
- 2012-07
- Volume
- 41
- Issue
- 4
- Pages
- 1107-1114
- ISSN
- 0047-2425 (ISSN-L)
- OpenAlex
- W2008766977
- Cited by
- 132
- References
- 36
- Citations by year
- 2026: 3 · 2025: 10 · 2024: 8 · 2023: 10 · 2022: 8 · 2021: 15 · 2020: 9 · 2019: 11 · 2018: 8 · 2017: 9 · 2016: 8 · 2015: 12 · 2014: 13 · 2013: 6 · 2012: 2
- FWCI
- 16.07
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Journal of Environmental Quality (publishedVersion)
- PubMed (publishedVersion)
- Funders
- University of California
- Topics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
- Physical Sciences › Environmental Science › Environmental Chemistry › Soil and Water Nutrient Dynamics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Agricultural Science and Fertilization
- Keywords
- biochar, soil amendment, carbon sequestration, nitrogen dynamics, nitrification, ammonification, greenhouse gas emissions, nitrous oxide, carbon dioxide, nutrient leaching, base cations, soil carbon storage
- MeSH terms
- Animals, Carbon, Cattle, Dairying, Gases, Manure, Nitrogen, Waste Disposal, Fluid, Water, Water Movements, Greenhouse Effect
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