Aged biochar affects gross nitrogen mineralization and recovery: a <sup>15</sup>N study in two contrasting soils

GCB Bioenergy - Tập 9 Số 7 - Trang 1196-1206 - 2017
Shamim Mia1, Balwant Singh1, Feike A. Dijkstra1
1Centre for Carbon, Water and Food, School of Life and Environmental Sciences, The University of Sydney, Camden, NSW 2570, Australia

Tóm tắt

AbstractBiochar is a pyrolysed biomass and largely consists of pyrogenic carbon (C), which takes much longer to decompose compared to the biomass it is made from. When applied to soil, it could increase agricultural productivity through nutrient retention and changing soil properties. The biochar‐mediated nutrient retention capacity depends on the biochar properties, which change with time, and on soil properties. Here, we examined the effects of a wood biochar (20 t ha−1), that has aged (21 months) in a grassland field, on gross nitrogen (N) mineralization (GNM) and 15N recovery using a 15N tracer. A field experiment was conducted in two soil types, that is a Tenosol and a Dermosol, and also included a phosphorus (P) addition treatment (1 kg ha−1). Compared to the control, biochar with P addition significantly increased GNM in the Tenosol. Possibly, biochar and P addition enhanced nutrient availability in this nutrient‐limited soil, thereby stimulating microbial activity. In contrast, biochar addition reduced GNM in the Dermosol, possibly by protecting soil organic matter (SOM) from decomposition through sorption onto biochar surfaces and enhanced formation of organo‐mineral complexes in this soil that had a higher clay content (29% vs. 8% in the Tenosol). Compared to the control, biochar significantly increased total 15N recovery in the Tenosol (on average by 12%) and reduced leaching to subsurface soil layers (on average by 52%). Overall, 15N recovery was greater in the Dermosol (83%) than the Tenosol (63%), but was not affected by biochar or P. The increased N recovery with biochar addition in the sandy Tenosol may be due to retention at exchange sites on aged biochar, while such beneficial effects may not be visible in soils with higher clay content. Our results suggest that aged biochar may increase N use efficiency through reduced leaching or gaseous losses in sandy soils.

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Tài liệu tham khảo

10.3390/agronomy6010013

10.1111/ejss.12064

10.1111/gcbb.12119

10.1016/j.pedobi.2011.07.005

10.1007/s10533-004-0372-y

10.1007/s11104-013-1913-8

10.1111/gcbb.12037

10.1111/j.1365-2389.2011.01377.x

10.2136/sssaj2011.0101

10.1111/aab.12014

10.1016/j.soilbio.2014.11.012

10.1016/j.agee.2013.10.009

10.1016/j.gca.2008.01.010

10.1007/s00374-012-0687-0

10.1007/s10533-007-9132-0

10.3390/agronomy3020275

10.1007/s11270-010-0366-4

10.1111/ejss.12094

10.1016/j.soilbio.2014.10.006

10.2134/jeq2005.0022

10.1007/s00374-015-0997-0

10.1007/s11104-012-1383-4

Guimarães GGF, 2015, Volatilization of ammonia originating from urea treated with oxidized charcoal, Journal of Brazillan Chemical Society, 26, 1928

10.1016/j.soilbio.2014.12.015

10.1111/gcbb.12250

10.1021/es400997n

10.1007/s00374-014-0908-9

10.2134/jeq2011.0100

Isbell R, 2002, The Australian Soil Classification, Vol. 4, 10.1071/9780643069817

10.1016/j.agee.2011.08.015

10.1016/j.soilbio.2015.06.007

10.2134/agronj2016.02.0074

10.1071/SR10036

10.2136/sssaj1954.03615995001800010009x

10.1016/j.envint.2015.10.018

10.1016/S0038-0717(00)00084-5

10.1016/j.soilbio.2011.04.022

10.1016/j.orggeochem.2009.09.007

10.1016/S2095-3119(13)60708-X

10.1016/j.soilbio.2014.04.029

10.1016/j.soilbio.2011.07.020

10.1016/j.chemosphere.2015.04.086

10.1016/j.geoderma.2016.08.011

10.1016/S1002-0160(15)30050-3

10.1016/bs.agron.2016.10.001

10.1111/j.1747-0765.2010.00501.x

10.3390/agronomy3020313

10.1016/S0065-2113(02)79002-0

10.1016/j.soilbio.2012.05.019

10.1111/gcbb.12156

10.1371/journal.pone.0086388

10.2134/jeq2011.0133

10.2134/jeq2009.0138

10.2136/sssaj1996.03615995006000060033x

10.1002/jpln.200625199

10.2136/sssaj2010.0325

10.1111/ejss.12302

10.1016/j.scitotenv.2016.01.160

10.1016/j.apsoil.2015.12.012

10.1038/srep05615

10.1111/gcbb.12266

10.1080/00380768.2013.830229

10.1016/j.soilbio.2011.02.005

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GCB Bioenergy

Tập 9 Số 7

1196-1206

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