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Effet du biochar sur la biodisponibilité du phosphore dans un sol limoneux acide
| Content Provider | Semantic Scholar |
|---|---|
| Author | Houben, David Hardy, Brieuc Faucon, M. Cornelis, J. |
| Copyright Year | 2017 |
| Abstract | Description of the subject. 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. |
| Starting Page | 209 |
| Ending Page | 217 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.25518/1780-4507.13539 |
| Volume Number | 21 |
| Alternate Webpage(s) | https://orbi.uliege.be/bitstream/2268/237510/1/Houben%20et%20al.%202017%20Biochar%20P.pdf |
| Alternate Webpage(s) | http://popups.ulg.ac.be/bao/mkh2p/index.php?upd=1502179032&url=http://popups.ulg.ac.be/1780-4507/index.php?id%3D13539%26format%3Dpdf |
| Alternate Webpage(s) | http://www.pressesagro.be/base/index.php/base/article/download/2345/870 |
| Alternate Webpage(s) | http://popups.ulg.ac.be/1780-4507/index.php?file=1&id=13546&pid=13539 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
