Sulfur dynamics in sub-tropical soils of Australia as influenced by long-term cultivation

Kopittke, Peter M., Dalal, Ram C. and Menzies, Neal W. (2016) Sulfur dynamics in sub-tropical soils of Australia as influenced by long-term cultivation. Plant and Soil, 402 1: 211-219. doi:10.1007/s11104-015-2789-6


Author Kopittke, Peter M.
Dalal, Ram C.
Menzies, Neal W.
Title Sulfur dynamics in sub-tropical soils of Australia as influenced by long-term cultivation
Journal name Plant and Soil   Check publisher's open access policy
ISSN 1573-5036
0032-079X
Publication date 2016-05
Sub-type Article (original research)
DOI 10.1007/s11104-015-2789-6
Open Access Status Not Open Access
Volume 402
Issue 1
Start page 211
End page 219
Total pages 9
Place of publication Dordrecht, Netherlands
Publisher Springer
Collection year 2017
Language eng
Formatted abstract
Background and aims Deficiencies of S in agricultural crops are becoming more common but comparatively little is known regarding the kinetics of cultivation-induced long-term changes in soil S pools.
Methods In the present study, six soils were examined with samples collected from 82 sites – this allowing examination of the effects of cultivation for up to 70 years.
Results For four of the six soils, long-term cultivation resulted in significant decreases in total S concentrations, with calculated decreases ranging from 35 to 51 %. This decrease was due to mineralization of organic S, with half-life values ranging from 1.0 to 11 years. Generally, organic S decreased linearly with organic C concentrations. For newly-cultivated soils, the mineralization of organic S was sufficient to replace the S harvested in wheat (Triticum aestivum) grain, but after prolonged cultivation, the rate of S mineralization decreased by several orders of magnitude.
Conclusions The data presented here provide important information on the effects of cultivation on S dynamics within sub-tropical soils – this being required to effectively and sustainably manage these systems.
Keyword Biochemical mineralization
Biological mineralization
Cultivation
Sulfur
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Agriculture and Food Sciences
 
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