Article (Scientific journals)
Effet du biochar sur la biodisponibilité du phosphore dans un sol limoneux acide
Houben, D.; Hardy, B.; Faucon, Michel-Pierre et al.
2017In Biotechnologie, Agronomie, Société et Environnement, 21 (3), p. 209-217
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Keywords :
Bioavailability; Carbon sequestration; Phosphorus; Soil fertility
Abstract :
[en] This paper deals with the impact of biochar on soil phosphorus (P) bioavailability with a view to improving the management of P fertilization. Objectives. The aim of this study was to explore the potential of biochar to increase P bioavailability in soil. The specific objectives were to elucidate the role of feedstock and the rate of application of biochar on P solubility. Method. Three biochars produced from different feedstocks (Miscanthus straws, coffee husks and woody material) were added to an acidic Luvisol at two rates of application (1% and 3%; w/w). At the end of a 76-day incubation period, P bioavailability was assessed (0.01 M CaCl2 extraction). Soil physico-chemical properties and the amount of CO2 emitted over the incubation period were also determined. Results. The wood-derived biochar applied at 3% was the only treatment that increased significantly P bioavailability (+ 75%). This increase might result from the release of P by biochar itself (direct effect) but also from an enhanced P solubility in soil (indirect effect) related to a large increase in pH (+3.6 units compared to the control) and a higher soil biological activity. The other treatments had no significant impact on soil P bioavailability, probably as a result of their minor effect on soil pH. Conclusions. Our study shows that biochar-induced changes in P bioavailability in soil varied greatly with type of feedstock and rate of application. However, the balance between the direct and indirect effects of biochar on P bioavailability was not elucidated. Further investigations are thus essential to clarify the potential of biochar to improve P bioavailability in the soil-plant system. © 2017 FAC univ sciences agronomiques Gembloux, All Right Reserved.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Houben, D.;  UniLaSalle, HydrISE, 19, rue Pierre Waguet, Beauvais cedex, F-60026, France
Hardy, B.;  Université catholique de Louvain, Earth and Life Institute – Environmental Sciences, Croix du Sud, 2 bte L7.05.10, Louvain-la-Neuve, BE-1348, Belgium
Faucon, Michel-Pierre;  UniLaSalle, HydrISE, 19, rue Pierre Waguet, Beauvais cedex, F-60026, France
Cornelis, Jean-Thomas ;  Université de Liège - ULiège > Ingénierie des biosystèmes (Biose) > Echanges Eau-Sol-Plantes
Language :
French
Title :
Effet du biochar sur la biodisponibilité du phosphore dans un sol limoneux acide
Alternative titles :
[en] Effect of biochar on phosphorus bioavailability in an acidic silt loam soil
Publication date :
2017
Journal title :
Biotechnologie, Agronomie, Société et Environnement
ISSN :
1370-6233
eISSN :
1780-4507
Publisher :
FAC UNIV SCIENCES AGRONOMIQUES GEMBLOUX
Volume :
21
Issue :
3
Pages :
209-217
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 26 June 2019

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