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Reduction of soil acidity for agriculture activities in Malaysian ultisols by rhodopseudomonas palustris

Khamis, A. K. and Asli, U. A. and Lee, C. T. and Zailani, S. N. and Sarmidi, M. R. (2017) Reduction of soil acidity for agriculture activities in Malaysian ultisols by rhodopseudomonas palustris. Chemical Engineering Transactions, 56 . pp. 667-672. ISSN 2283-9216

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The potential of the phototrophic bacterium, Rhodopseudomonas palustris (R. palustris), to reduce the acidic soil pH of Malaysian Ultisols (Bungor Series) was investigated. The R. palustris was first adsorbed onto the dried pineapple leaves (DPL) before being applied. The most suitable broth condition for the bacterium that could be adsorbed onto the DPL was identified. Different conditions and amounts of R. palustris adsorbed onto the DPL % (w/w) were tested in soils where the soil pH was monitored. It was found that the maximum cell adsorption onto the DPL was obtained using an initial cell concentration of 1.5 x 107 colony-forming units (CFU) mL-1, at pH 8.0 with the ionic strength of 5 mmolL-1 ammonium nitrate (NaNO3). The R. palustris was adsorbed onto the DPL surface area of 64.33 Å. The acidic soil was treated with R. palustris adsorbed onto the DPL by direct application. The calcium carbonate (CaCO3) was introduced as a benchmark to reduce the soil acidity. The results showed that, with the application of R. palustris adsorbed on 5.0 % (w/w) of DPL, the soil pH was improved from 4.9 to more than 6.0 after 12 d of application. This improved soil pH will make the soil more applicable for agricultural activity.

Item Type:Article
Uncontrolled Keywords:phototrophic bacterium, Rhodopseudomonas palustris (R. palustris)
Subjects:T Technology > TP Chemical technology
Divisions:Chemical Engineering
ID Code:75826
Deposited By: Widya Wahid
Deposited On:30 May 2018 12:01
Last Modified:30 May 2018 12:01

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