Use of alkaline flyash-based products to amend soil acids: Plant growth response and nutrient uptake

Spark, K. M. and Swift, R. S. (2008) Use of alkaline flyash-based products to amend soil acids: Plant growth response and nutrient uptake. Australian Journal of Soil Research, 46 7: 578-584. doi:10.1071/SR07209


Author Spark, K. M.
Swift, R. S.
Title Use of alkaline flyash-based products to amend soil acids: Plant growth response and nutrient uptake
Journal name Australian Journal of Soil Research   Check publisher's open access policy
ISSN 0004-9573
Publication date 2008-10-08
Sub-type Article (original research)
DOI 10.1071/SR07209
Open Access Status
Volume 46
Issue 7
Start page 578
End page 584
Total pages 7
Place of publication Sydney, Australia
Publisher CSIRO Publishing
Language eng
Subject C1
961203 Rehabilitation of Degraded Forest and Woodlands Environments
070199 Agriculture, Land and Farm Management not elsewhere classified
0701 Agriculture, Land and Farm Management
Abstract Vast quantities of flyash are generated annually by the burning of coal in the power industry, with most of this material being stockpiled with little prospect of being utilised at present. Two alkaline flyash-based products (FAP) for use as soil amendments (FAP1 and FAP2) have been assessed using glasshouse pot trials to determine the suitability of using these products to treat acid soils. The products both contain ~80% flyash which originated from coal-fired electricity generation. The acid soils used in the study were 2 Podsols and a Ferrosol, all originating from south-east Queensland and ranging in pH (1 : 5 suspension in water) from 4 to 5.5. The flyash products when applied to the soil significantly enhanced growth of maize plants (Zea mays L.), with optimal application rates in the range 1.25–5% w/w. The FAP/soil mixtures and plants were analysed using a range of methods including extraction with DTPA, and plant biomass (aboveground dry matter). The results indicate that in addition to the liming effect, the flyash in the alkaline flyash products may enhance plant growth as a result of increasing the uptake of micro-nutrients such as copper, zinc, and manganese. The study suggests that flyash has the potential to be used as a base material in the production of soil amendment materials that can change soil pH and act as a fertiliser for certain soil micro-nutrients such as Cu, Mn, and Zn.
Keyword Soil acidity
Soil amendments
Plant growth
Plant micro-nutrients
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Fri, 17 Apr 2009, 04:59:13 EST by Emma Cushworth on behalf of Faculty Of Nat Resources, Agric & Veterinary Sc