Recycled organic products to reduce the negative impact of salinity and sodicity on acidic soil properties and plant growth

Raue, Judith Doris (2008) Recycled organic products to reduce the negative impact of salinity and sodicity on acidic soil properties and plant growth. Masters by Research thesis, Queensland University of Technology.


Salt affected soils and their effects on land and water resources have been identified as one of the most severe environmental problems facing Australia. This current study focused on the incorporation of recycled organic products (RO) into an acidic saline soil that had been irrigated with an industrial effluent (IE), specifically to investigate the potential for these organics to be used in rehabilitation. Compost incorporated into the acidic saline soil was able to raise pH to more favourable levels required for plant growth (pH 6 – 7.5). Plant growth was however dependent on the input material of the compost as well as the irrigation scheme. The soils amended with this compost generally showed higher and more rapid microbial activity, measured by CO2 emissions, in all amendment rates than the plant derived compost. Overall it could be concluded that the application of RO on saline soils improved the establishment and growth of plants and alleviated to some degree the negative effects of IE. However great care should be taken at the selection of the input material, as high rates of ammonium, calcium and other soluble salts can increase the EC of an amended soil further.

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ID Code: 20652
Item Type: QUT Thesis (Masters by Research)
Supervisor: Grace, Peter R.
Keywords: recycling, organic products, salinity, sodicity, acidic soil, plant growth
Divisions: Past > Schools > Biogeoscience
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Institution: Queensland University of Technology
Deposited On: 25 May 2009 04:49
Last Modified: 09 Feb 2011 13:53

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