The effect of organic mulch amendments on the physical and chemical properties and revegetation success of a saline-sodic minespoil from central Queensland, Australia

Grigg, AH, Sheridan, GJ, Pearce, AB and Mulligan, DR (2006) The effect of organic mulch amendments on the physical and chemical properties and revegetation success of a saline-sodic minespoil from central Queensland, Australia. Australian Journal of Soil Research, 44 2: 97-105. doi:10.1071/SR05047


Author Grigg, AH
Sheridan, GJ
Pearce, AB
Mulligan, DR
Title The effect of organic mulch amendments on the physical and chemical properties and revegetation success of a saline-sodic minespoil from central Queensland, Australia
Journal name Australian Journal of Soil Research   Check publisher's open access policy
ISSN 0004-9573
Publication date 2006-01-01
Sub-type Article (original research)
DOI 10.1071/SR05047
Open Access Status Not yet assessed
Volume 44
Issue 2
Start page 97
End page 105
Total pages 9
Editor Jenny C Fegent
Place of publication Collingwood, Victoria
Publisher CSIRO Publishing
Language eng
Subject C1
300801 Environmental Management and Rehabilitation
771007 Rehabilitation of degraded mining lands
Abstract Saline-sodic clay minespoil materials excavated during open-cut coal mining in central Queensland, Australia, pose significant challenges for revegetation, particularly where suitable topsoil capping is not available. We examined the ability of sawdust or straw mulch amendments to ameliorate the adverse properties of these minespoils and improve the success of revegetation efforts. In laboratory studies, mulch application improved infiltration, increased soil moisture retention and reduced surface crust strength. In the field, mulches incorporated to a depth of 0.15 m at application rates of at least 20 t/ha straw or 80 t/ha sawdust were needed to mitigate against capillary rise of salts during drying cycles and support satisfactory vegetation cover. Further research is needed to determine whether improvements are maintained beyond the 4-year trial period reported here.
Keyword Agriculture, Soil Science
Reclamation
Overburden
Crust Formation
Straw
Sawdust
Gypsum
Bentonite Mine Spoils
Wood-residue
Erosion
Soil
Responses
Runoff
Cover
Soil Science
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 20:46:46 EST