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Evaluation of Arsenic Accumulation by Colocasia Esculenta (kochu) from Soil

M.I. MANIRUL
Scientifc Officer
Bangladesh Institute of Nuclear Agriculture (BINA), Bangladesh

U. MAYDA
Department of Botany, Jahangirnagar University, Savar, Dhaka, Bangladesh

H. MEHRAJ
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

I.H. SHIAM
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

A.F.M. JAMAL UDDIN
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

Abstract/ Executive Summary:

The experiment was conducted at the Horticulture farm, Sher-e-Bangla Agricultural University, Bangladesh during July 2012 to October 2012. An experiment was conducted for the evaluation of arsenic accumulation by kochu (Colocasia esculenta) from different concentration of arsenic contaminated soil during July 2012 to October 2012. Plants were grown on soil treated with different arsenic concentrations viz. A0; 0 mg/kg, A₁; 500 mg/kg, A₂; 1000 mg/kg and A₃; 2000 mg/kg. From the experiment it was found that leaf number, plant height, leaf area, number of runner, number of sucker, plant leaf biomass and runner biomass were decreased significantly while the arsenic contamination level in soil increased. Kochu leaves accumulated 422.3, 751.7 and 973.5 mg/kg arsenic and kochu runner accumulated 178.8, 202.3 and 210.4 mg/kg arsenic when soil treated with 2000 mg/kg, 1000 mg/kg and 500 mg/kg arsenic respectively.

Keywords: Colocasia esculenta, Soil arsenic, Arsenic accumulation

Location: Horticulture farm, Sher-e-Bangla Agricultural University, Bangladesh

Start Date: 00-07-2012

End Date: 00-10-2012

Program Area: Risk Management in Agriculture

Commodity: Aroids

Objectives:

To evaluate the arsenic accumulation by kochu (Colocasia esculenta) from different concentration of arsenic contaminated soil.

Methodology:

The experiment was conducted at the Horticulture farm, Sher-e-Bangla Agricultural University, Bangladesh during July 2012 to October 2012. Three weeks kochu seedlings were used in the experiment. The experiment was carried out in a Completely Randomized Design where soil treated with four levels of arsenic viz. A₀: Control (0 mg/kg); A₁: 500 mg/kg; A₂: 1000 mg/kg; A₃: 2000 mg/kg with three replications. Arsenic was applied in the form of Arsenic trioxide (As₂O₃). A ratio of 1:1 well rotten cow dung and soil were mixed and pots were filled 15 days before transplanting. Three weeks old kochu seedlings were transplanted in the pot. The pots were hand-weeded and watered as needed. No additional fertilizers or soil amendments were used during the growing season. Data were collected on leaf number, plant height, leaf area, number of runner, number of sucker, leaf biomass, runner biomass and arsenic accumulationin leaf and runner. Leaf area was measured by non-destructive method using CL-202 Leaf Area Meter, (USA) and plant biomass was measured by using precision balance after drying (oven dry). The chemical analysis was performed by using “Atomic Absorption Spectrometer” in Bangladesh Council of Scientific Research Institute (BCSRI). Collected data were statistically analyzed using MSTAT-C computer package programmed. Mean for every treatments were calculated and the analysis of variance for each one of the characters was performed by F–test (Variance Ratio). Difference between treatments was evaluated by Least Significance Difference (LSD) test at 5% level of significance.

Source of Information: J. Soil Nature, 8(2):1-4, 2015

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

When the soil contamination level was 2000 mg/kg then kochu plant accumulated 973.5 mg/kg arsenic in leaves and 210.3 mg/kg arsenic in runner. Kachu had a higher arsenic accumulating capability and hence could be recommended for phytoremediation of arsenic contaminated soils.

Knowledge Management: Journal