Cited by 111Soil Carbon and Nitrogen DynamicsLegume Nitrogen Fixing SymbiosisAgricultural Science and Fertilization

Partitioning the contributions of biochar properties to enhanced biological nitrogen fixation in common bean (Phaseolus vulgaris)

Güereña, David T., Lehmann, Johannes, Thies, Janice E., Enders, Akio, Karanja, Nancy, Neufeldt, Henry·2015·Biology and Fertility of Soils

Abstract

Studies document increases in biological nitrogen fixation (BNF) following applications of biochar. However, the underlying mechanisms for this response remain elusive. Greenhouse experiments were conducted to test the effects of biochar mineral nutrients, pH, and volatile matter (VM) on BNF in common beans (Phaseolus vulgaris L.). Biochars were produced from seven feedstocks pyrolyzed at either 350 or 550 °C. Biochars were treated with acid to reduce mineral nutrient contents, with acetone to remove acetone-soluble VM, with steam to reduce both the mineral and VM contents, or left untreated. The biochar additions at a rate of 15 t ha⁻¹resulted in an average 262 % increase in shoot biomass, 164 % increase in root biomass, 3575 % increase in nodule biomass, and a 2126 % increase in N derived from atmosphere (Ndfa) over the control. Simple mineral nutrients and soil acidity amelioration from the biochar were only to a minimal extent responsible for these increases (r² = 0.03; P = 0.0298, n = 201). Plant growth and Ndfa were significantly correlated with plant P uptake (r² = 0.22; P < 0.0001, n = 201). However, plant P uptake was not correlated with biochar P additions (P > 0.05). Improved P nutrition resulted from 360 % greater mycorrhizal colonization with biochar additions. Removal of acetone-soluble VM increased plant growth and Ndfa, and VM extracted from the biochar produced at 350 °C reduced the growth of rhizobia in yeast extract mannitol agar (YMA) medium. In contrast, acetone-soluble VM extracted from seven biochars produced at 550 °C increased the growth of rhizobium in the YMA compared to an acetone-residue control, suggesting differential effects of VM forms on rhizobia.

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Crossref · 10.1007/s00374-014-0990-z

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Authors
Güereña, D. T., Lehmann, J., Thies, J. E., Enders, A., Karanja, N., & Neufeldt, H.
Affiliations
  • Cornell University (US)
  • University of Nairobi (KE)
  • World Agroforestry Centre (KE)
Corresponding author
Lehmann, Johannes
Venue
Biology and Fertility of Soils
Published
2015-01-29
Volume
51
Issue
4
Pages
479-491
ISSN
  • 0178-2762 (ISSN-L)
  • 1432-0789
OpenAlex
W2068194912
Cited by
111
References
63
Citations by year
2026: 3 · 2025: 10 · 2024: 5 · 2023: 6 · 2022: 14 · 2021: 14 · 2020: 12 · 2019: 8 · 2018: 13 · 2017: 12 · 2016: 11 · 2015: 3
FWCI
17.81
Type
journal article
Language
en
Open access
closed
Locations
Biology and Fertility of Soils (publishedVersion)
Funders
Mario Einaudi Center for International Studies
Topics
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Legume Nitrogen Fixing Symbiosis
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Agricultural Science and Fertilization
Keywords
biochar, nitrogen fixation, Phaseolus vulgaris, rhizobia, mycorrhizal colonization, phosphorus nutrition, biochar pyrolysis temperature, soil pH, root nodules, nitrogen derived from atmosphere

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