Journal cover Journal topic
SOIL An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/soil-2017-16
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Original research article
23 Jun 2017
Review status
This discussion paper is a preprint. A revision of this manuscript was accepted for the journal SOIL (SOIL) and is expected to appear here in due course.
Bone char effects on soil: sequential fractionations and XANES spectroscopy
Mohsen Morshedizad1, Kerstin Panten2, Wantana Klysubun3, and Peter Leinweber1 1Soil Science, Faculty of Agricultural and Environmental Sciences, University of Rostock, Justus-von-Liebig Weg 6, 18051 Rostock, Germany
2Institute for Crop and Soil Science, Julius Kühn Institute, Bundesallee 50, D-38116 Braunschweig, Germany
3Synchrotron Light Research Institute, 111 University Avenue, Muang District, Nakhon Ratchasima 30000, Thailand
Abstract. Acceptability of novel bone char fertilizers depends on their P release but reactions at bone char surfaces and impacts to soil P speciation are insufficiently known. By sequential fractionation and synchrotron-based X-ray absorption near edge structure (XANES) spectroscopy we investigated whether and how the chemical composition of bone char particles has been altered in soil and, consequently, has affected the P speciation of amended soils. Therefore, two different kinds of bone char particles (BC, produced by pyrolysis of degreased animal bone chips at 800 ºC and BCplus, a BC enriched with reduced sulfur compounds) were manually separated from the soil at the end of two different experiments: incubation-leaching and ryegrass cultivation. Sequential P-fractionation of amended soils showed P-enrichment in all fractions as compared to the control. The most P increase between all treatments significantly occurred in the NaOH-P and resin-P fractions in response to BCplus application in both, incubation-leaching and ryegrass cultivation experiments. This increase of the readily available P fraction in BCplus treated soils was confirmed by linear combination fitting (LCF) analysis on P K-edge XANES spectra of BCs particles and amended soils. The proportion of Ca-hydroxyapatite decreased, whereas the proportion of CaHPO4 increased in BCplus particles after amended soils had been incubated and leached and cropped by ryegrass. Based on P-XANES speciation as determined by LCF analysis, the proportion of inorganic Ca(H2PO4)2 increased in amended soils after BCplus application. These results indicated that soil amendment with BCplus particles leads to elevated P concentration and maintains more soluble P species than BC particles even after 230-days of ryegrass cultivation.

Citation: Morshedizad, M., Panten, K., Klysubun, W., and Leinweber, P.: Bone char effects on soil: sequential fractionations and XANES spectroscopy, SOIL Discuss., https://doi.org/10.5194/soil-2017-16, in review, 2017.
Mohsen Morshedizad et al.
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
 
RC1: 'Interactive comment on "Bone char effect on soil: Sequential fractionations and XANES spectroscopy" by Morshedizad et al.', Sander Bruun, 24 Jul 2017 Printer-friendly Version 
 
RC2: 'Review', Anonymous Referee #2, 28 Jul 2017 Printer-friendly Version 
 
AC1: 'Response to Referees', Peter Leinweber, 30 Aug 2017 Printer-friendly Version Supplement 
Mohsen Morshedizad et al.
Mohsen Morshedizad et al.

Viewed

Total article views: 300 (including HTML, PDF, and XML)

HTML PDF XML Total BibTeX EndNote
223 74 3 300 1 1

Views and downloads (calculated since 23 Jun 2017)

Cumulative views and downloads (calculated since 23 Jun 2017)

Viewed (geographical distribution)

Total article views: 300 (including HTML, PDF, and XML)

Thereof 299 with geography defined and 1 with unknown origin.

Country # Views %
  • 1

Saved

Discussed

Latest update: 12 Dec 2017
Publications Copernicus
Download
Short summary
We investigated how the composition of bone char (BC) particles altered in soil and affected the soil P speciation by fractionation and X-ray absorption near edge structure spectroscopy. Bone char particles (BC from pyrolysis of bone chips and BCplus, a BC enriched with S compounds) collected at the end of incubation-leaching and ryegrass cultivation trials. Soil amendment with BCplus lead to elevated P concentrations and maintained more soluble P species than BC even after ryegrass growth.
We investigated how the composition of bone char (BC) particles altered in soil and affected the...
Share