Cited by 176Phosphorus and nutrient managementSoil Carbon and Nitrogen DynamicsAgricultural Science and Fertilization

Contrasting effects of biochar on phosphorus dynamics and bioavailability in different soil types

Bornø, Marie Louise, Müller-Stöver, Dorette Sophie, Liu, Fulai·2018·Science of The Total Environment

Abstract

We investigated how two different biochars (wood biochar - WBC and straw biochar - SBC) affected P dynamics and bioavailability in five different soils differing in pH, C%, texture, Fe, Al, Ca, and Mg giving a range of soils with low (S1 and S2), intermediate (S4), and high (S3 and S5) P sorption capacities. Langmuir and Freundlich equations were fitted to the sorption data of soil and soil/biochar mixtures. P fertilizer applied to all treatments was fractioned into strongly sorbed P (qS), easily available sorbed P (qA) and solution P (c) by determining the anion exchange resin (AER)-extractable P in samples from the sorption experiment. A pot experiment was conducted to measure P uptake by maize grown in S1, S2 and S3 amended with WBC or SBC at two P fertilizer levels (0 or 70mgPkg-1). Only WBC could sorb P from solution partly due to a high content of calcite. SBC did not have any effect on P sorption isotherms, whereas WBC increased the P sorption in S1, S2, and S4, yet decreased P sorption in acidic soil S5. qS increased in S1, S2, and S4, and decreased in S5 in WBC treatments, whereas, qS decreased in SBC treatments in soils S2, S4, and S5. Accordingly, there was a significant interaction between soil type and biochar on maize growth and P uptake. Biochar had no effect in an alkaline soil (S3), whereas, WBC and SBC had positive effects on maize growth in slightly acidic soils S1 and S2, depending on the soil P status, however, the P uptake was lower in WBC compared to SBC treatments. Biochar and soil properties and the P status of the soil affect P bioavailability. The study provides useful information for optimizing the use of biochar in agricultural P management.

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Crossref · 10.1016/j.scitotenv.2018.01.283

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Authors
Bornø, M. L., Müller-Stöver, D. S., & Liu, F.
Affiliations
University of Copenhagen (DK)
Corresponding author
Bornø, Marie Louise
Venue
Science of The Total Environment
Publisher
Elsevier BV
Published
2018-06
Volume
627
Pages
963-974
ISSN
0048-9697 (ISSN-L)
OpenAlex
W2792353962
Cited by
174
References
72
Citations by year
2026: 15 · 2025: 23 · 2024: 21 · 2023: 24 · 2022: 22 · 2021: 29 · 2020: 18 · 2019: 14 · 2018: 8
FWCI
15.84
Type
journal article
Language
en
Open access
closed
Locations
  • The Science of The Total Environment (publishedVersion)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (submittedVersion)
Funders
Institute of Soil Science, Chinese Academy of Sciences
Topics
  • Physical Sciences › Environmental Science › Waste Management and Disposal › Phosphorus and nutrient management
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Agricultural Science and Fertilization
Keywords
biochar, phosphorus dynamics, phosphorus bioavailability, phosphorus sorption, wood biochar, straw biochar, soil amendment, phosphorus fractionation, sorption isotherms, soil pH, soil phosphorus status, agricultural phosphorus management

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