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Can organic amendments be used to improve the properties of bauxite processing residue sand
| Content Provider | Semantic Scholar |
|---|---|
| Author | Jones, B. E. H. Haynes, Richard J. Phillips, Ian Ross |
| Copyright Year | 2010 |
| Abstract | The effects of adding of a range of organic amendments (biosolids, spent mushroom compost, green waste compost and green waste-derived biochar), at two rates, on some key chemical, physical and microbial properties of bauxite processing sand were studied in a laboratory incubation study. Addition of all amendments tended to decrease bulk density and macroporosity but increase total porosity, available water holding capacity and water retention at field capacity (-10 kPa). Addition of biosolids, mushroom compost and green waste compost all increased soluble organic C, microbial biomass C and basal respiration. The germination index of watercress grown in the materials was greatly reduced by biosolids application and this was attributed to the combined effects of a high EC and large concentrations of extractable P and NO 3 - -N. We concluded that the increases in both water retention and microbial activity induced by additions of the composts is likely to improve the properties of residue sand as a growth medium during revegetation. |
| Starting Page | 32 |
| Ending Page | 35 |
| Page Count | 4 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.iuss.org/19th%20WCSS/Symposium/pdf/0296.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
