High pyrolysis temperature biochars reduce nitrogen availability and nitrous oxide emissions from an acid soil

Biochar–bioenergy coproduction from biomass pyrolysis has the potential to contribute to climate change mitigation. Biochar produced at various pyrolysis temperatures (<600°C) has been widely studied. However, the effect of biochars, produced at high pyrolysis temperature (≥600°C), on soil nitrogen (N) dynamics and nitrous oxide (N2O) emission is largely unknown. A pot trial was performed to examine the effect of high pyrolysis temperature (600, 700, 850 and 950°C) woody biochars on soil N dynamics, microbial gene abundance and N2O emissions with (+N) and without N (−N) fertilization from an acid soil. Results showed that all biochar treatments significantly lowered the N2O emissions in both fertilized and unfertilized regimes. However, the suppressive effect on N2O emission among different high pyrolysis temperatures was not statistically different. Biochar amendment significantly decreased the concentration of soil NH4+, and lower levels of soil NO3− were observed at the later stage of experiment. Under −N, plant biomass and N uptake were significantly lowered in all biochar treatments. Under +N, biochar addition significantly increased plant biomass, while only the 700°C biochar significantly increased N uptake. This suggests that single application of biochar could limit soil mineral N bioavailability and further decrease plant growth and N uptake in the plant–soil system. Biochar amendments tended to increase nitrous oxide reductase (nosZ) gene abundance, but this effect was only significant for biochar produced at 950°C under +N. In conclusion, high pyrolysis temperature biochars can be effectively used to reduce N2O emission, while increases in nosZ gene abundance and decreases in NH4+ and NO3− concentrations in the acid soil are likely to be responsible for the reduction in N2O emission. Thus, woody biochars as a by‐product produced at high pyrolysis temperature have the potential to mitigate soil N2O emission via modifying N transformation and further affect climate change.

[1]  R. Mulvaney.  Nitrogen-Inorganic Forms , 2018, SSSA Book Series.

[2]  C. Kammann,et al.  Microstructural and associated chemical changes during the composting of a high temperature biochar: Mechanisms for nitrate, phosphate and other nutrient retention and release. , 2018, The Science of the total environment.

[3]  C. Scheer,et al.  Assessment of N2O emissions from a fertilised vegetable cropping soil under different plant residue management strategies using 15N tracing techniques. , 2017, The Science of the total environment.

[4]  C. Kammann,et al.  Biochar reduced nitrate leaching and improved soil moisture content without yield improvements in a four-year field study , 2017 .

[5]  D. K. Zhang,et al.  Stoichiometric ratio of dissolved organic carbon to nitrate regulates nitrous oxide emission from the biochar-amended soils. , 2017, The Science of the total environment.

[6]  Chengrong Chen,et al.  Linking chemical and biochemical composition of plant materials to their effects on N2O emissions from a vegetable soil , 2016 .

[7]  R. Dahlgren,et al.  Modeling nitrous oxide emission from rivers: a global assessment , 2016, Global change biology.

[8]  P. N. Nelson,et al.  Benefits of biochar, compost and biochar-compost for soil quality, maize yield and greenhouse gas emissions in a tropical agricultural soil. , 2016, The Science of the total environment.

[9]  C. Scheer,et al.  Rice husk biochar and crop residue amendment in subtropical cropping soils: effect on biomass production, nitrogen use efficiency and greenhouse gas emissions , 2016, Biology and Fertility of Soils.

[10]  A. Cowie,et al.  Lowering N2O emissions from soils using eucalypt biochar: the importance of redox reactions , 2015, Scientific Reports.

[11]  L. Zwieten,et al.  Wood biochar increases nitrogen retention in field settings mainly through abiotic processes , 2015 .

[12]  P. R. Day,et al.  Particle Fractionation and Particle‐Size Analysis , 2015 .

[13]  M. Ali,et al.  Mitigating yield-scaled greenhouse gas emissions through combined application of soil amendments: A comparative study between temperate and subtropical rice paddy soils. , 2015, The Science of the total environment.

[14]  Chengrong Chen,et al.  Strategies to mitigate greenhouse gas emissions in intensively managed vegetable cropping systems in subtropical Australia , 2015 .

[15]  P. Boeckx,et al.  Temporal evolution of biochar's impact on soil nitrogen processes – a 15N tracing study , 2015 .

[16]  C. Kammann,et al.  Plant growth improvement mediated by nitrate capture in co-composted biochar , 2015, Scientific Reports.

[17]  L. Zwieten,et al.  The molar H: Corg ratio of biochar is a key factor in mitigating N2O emissions from soil , 2015 .

[18]  O. Mašek,et al.  Pyrolysis biochar systems, balance between bioenergy and carbon sequestration , 2015 .

[19]  Danielle D. Bellmer,et al.  Recent advances in utilization of biochar , 2015 .

[20]  J. Whitaker,et al.  Biochar suppresses N2O emissions while maintaining N availability in a sandy loam soil , 2015 .

[21]  J. Mcdonagh,et al.  Biochar for Environmental Management , 2015 .

[22]  Yong-guan Zhu,et al.  Biochar impacts soil microbial community composition and nitrogen cycling in an acidic soil planted with rape. , 2014, Environmental science & technology.

[23]  D. Murphy,et al.  An incubation study investigating the mechanisms that impact N2O flux from soil following biochar application , 2014 .

[24]  T. Clough,et al.  Biochar does not affect soil N-transformations or microbial community structure under ruminant urine patches but does alter relative proportions of nitrogen cycling bacteria , 2014 .

[25]  T. Scholten,et al.  Linking N2O emissions from biochar-amended soil to the structure and function of the N-cycling microbial community , 2013, The ISME Journal.

[26]  P. Boeckx,et al.  Effect of different biochar and fertilizer types on N2O and NO emissions , 2014 .

[27]  Y. Elad,et al.  Rhizoctonia solani suppression and plant growth promotion in cucumber as affected by biochar pyrolysis temperature, feedstock and concentration , 2014 .

[28]  J. Whitaker,et al.  Can biochar reduce soil greenhouse gas emissions from a Miscanthus bioenergy crop? , 2014 .

[29]  J. Lehmann,et al.  Biochar and denitrification in soils: when, how much and why does biochar reduce N2O emissions? , 2013, Scientific Reports.

[30]  T. Clough,et al.  A Review of Biochar and Soil Nitrogen Dynamics , 2013 .

[31]  R. Kettunen,et al.  Biochar addition indirectly affects N2O emissions via soil moisture and plant N uptake , 2013 .

[32]  C. Stewart,et al.  Co‐generated fast pyrolysis biochar mitigates green‐house gas emissions and increases carbon sequestration in temperate soils , 2013 .

[33]  J. Novak,et al.  Addition of activated switchgrass biochar to an aridic subsoil increases microbial nitrogen cycling gene abundances , 2013 .

[34]  D. Rasse,et al.  Characterization, stability, and plant effects of kiln-produced wheat straw biochar. , 2013, Journal of environmental quality.

[35]  Liesbeth Bouckaert,et al.  Short-term CO2 and N2O emissions and microbial properties of biochar amended sandy loam soils , 2013 .

[36]  Catherine E Stewart,et al.  Biochar and nitrogen fertilizer alters soil nitrogen dynamics and greenhouse gas fluxes from two temperate soils. , 2012, Journal of environmental quality.

[37]  J. Ippolito,et al.  Biochar and manure affect calcareous soil and corn silage nutrient concentrations and uptake. , 2012, Journal of environmental quality.

[38]  A. Cowie,et al.  Biochar and Emissions of Non-CO2 Greenhouse Gases from Soil , 2012 .

[39]  D. Etheridge,et al.  Trends and seasonal cycles in the isotopic composition of nitrous oxide since 1940 , 2012 .

[40]  S. Sohi,et al.  Localisation of nitrate in the rhizosphere of biochar-amended soils , 2011 .

[41]  M. Velde,et al.  A quantitative review of the effects of biochar application to soils on crop productivity using meta-analysis , 2011 .

[42]  G. Pan,et al.  Effect of biochar amendment on maize yield and greenhouse gas emissions from a soil organic carbon poor calcareous loamy soil from Central China Plain , 2011, Plant and Soil.

[43]  Caroline A. Masiello,et al.  Biochar effects on soil biota – A review , 2011 .

[44]  Gpj Geert Verbong,et al.  Biomass gasification: Still promising? A 30-year global overview , 2011 .

[45]  L. Zwieten,et al.  Influence of biochars on flux of N2O and CO2 from Ferrosol. , 2010 .

[46]  T. Clough,et al.  Biochar and the nitrogen cycle: introduction. , 2010, Journal of environmental quality.

[47]  A. Cowie,et al.  Influence of biochars on nitrous oxide emission and nitrogen leaching from two contrasting soils. , 2010, Journal of environmental quality.

[48]  S. Riha,et al.  Maize yield and nutrition during 4 years after biochar application to a Colombian savanna oxisol , 2010, Plant and Soil.

[49]  A. Cowie,et al.  Effects of biochar from slow pyrolysis of papermill waste on agronomic performance and soil fertility , 2010, Plant and Soil.

[50]  D. C. Reicosky,et al.  Impacts of Sixteen Different Biochars on Soil Greenhouse Gas Production , 2009 .

[51]  D. Laird,et al.  Review of the pyrolysis platform for coproducing bio‐oil and biochar , 2009 .

[52]  S. O. Petersen,et al.  Effects of C and N availability and soil-water potential interactions on N2O evolution and PLFA composition. , 2009 .

[53]  Y. Inoue,et al.  Biochar amendment techniques for upland rice production in Northern Laos 1. Soil physical properties, leaf SPAD and grain yield , 2009 .

[54]  J. Lehmann,et al.  Biochar for Environmental Management: Science and Technology , 2009 .

[55]  Yong-guan Zhu,et al.  Ammonia-oxidizing archaea: important players in paddy rhizosphere soil? , 2008, Environmental microbiology.

[56]  Akwasi A. Boateng,et al.  Distributed processing of biomass to bio‐oil for subsequent production of Fischer‐Tropsch liquids , 2008 .

[57]  P. Chain,et al.  The impact of genome analyses on our understanding of ammonia-oxidizing bacteria. , 2007, Annual review of microbiology.

[58]  M. Kuypers,et al.  New processes and players in the nitrogen cycle: the microbial ecology of anaerobic and archaeal ammonia oxidation , 2007, The ISME Journal.

[59]  L. Zwieten,et al.  Agronomic values of greenwaste biochar as a soil amendment , 2007 .

[60]  Johannes Lehmann,et al.  Nutrient availability and leaching in an archaeological Anthrosol and a Ferralsol of the Central Amazon basin: fertilizer, manure and charcoal amendments , 2003, Plant and Soil.

[61]  P. Brookes,et al.  AN EXTRACTION METHOD FOR MEASURING SOIL MICROBIAL BIOMASS C , 1987 .

[62]  E. Davidson,et al.  Distinguishing between Nitrification and Denitrification as Sources of Gaseous Nitrogen Production in Soil , 1986, Applied and environmental microbiology.

[63]  P. Brookes,et al.  Chloroform fumigation and the release of soil nitrogen: A rapid direct extraction method to measure microbial biomass nitrogen in soil , 1985 .

[64]  A. Page.  Methods of soil analysis. Part 2. Chemical and microbiological properties. , 1982 .

[65]  E. Teller,et al.  ADSORPTION OF GASES IN MULTIMOLECULAR LAYERS , 1938 .

[66]  E. Rideal.  Adsorption of Gases , 1932, Nature.