Academic Publications
My Publications
2023
Sakunthala, KADD; Perera, PLRA; Perera, WPRT; Liyanage, JA; Premaratne, WAPJ
Impact of organic farming practices on toxic metal accumulation in topsoil in paddy areas: A comparative study in Sri Lanka Proceedings Article
In: pp. 32, University of Kelaniya, Sri Lanka International Postgraduate Research Conference (IPRC), Department of Chemistry, Faculty of Science, University of Kelaniya, Sri Lanka, 2023.
Abstract | Links | BibTeX | Tags: Bioaccumulation, Organic Farming, paddy soil, Sri Lanka, Toxic Metals
@inproceedings{Sakunthala2023,
title = {Impact of organic farming practices on toxic metal accumulation in topsoil in paddy areas: A comparative study in Sri Lanka},
author = {KADD Sakunthala and PLRA Perera and WPRT Perera and JA Liyanage and WAPJ Premaratne},
url = {https://www.researchgate.net/publication/377599811_Impact_of_organic_farming_practices_on_toxic_metal_accumulation_in_topsoil_in_paddy_areas_A_comparative_study_in_Sri_Lanka
https://conf.kln.ac.lk/iprc/media/attachments/2024/01/23/abstract-volume-2023.pdf},
year = {2023},
date = {2023-11-24},
volume = {23},
issue = {2023},
pages = {32},
publisher = {International Postgraduate Research Conference (IPRC)},
address = {Department of Chemistry, Faculty of Science, University of Kelaniya, Sri Lanka},
organization = {University of Kelaniya, Sri Lanka},
abstract = {Given the increasing importance of sustainability in agriculture, this study investigateshow organic farming influences soil toxicity, specifically the accumulation of toxic metalsin paddy fields within the Anamaduwa Divisional Secretariat area. Collections of paddysoil samples were made both from an organically cultivated field and a chemicallyfertilized field. Twenty composite topsoil samples were collected from each paddy fieldaccording to the random sampling method. Soil quality parameters such as soil pH,conductivity, organic matter, total phosphate, potassium, ammonium nitrogen, and ashcontent were analyzed and toxic metal concentrations(Pb, Cd, As, Ni, and Cr) wereanalyzed by Inductively Coupled Plasma–Mass Spectrometry(ICP-MS). Results indicatethe soil collected from paddy areas treated with chemical fertilizers has high average pH,conductivity, total phosphate content, and potassium content. The ammonium nitrogenand ash content were enhanced in the soil collected from organic land and organiccontent fluctuated slightly between the two areas(p>0.05). Soil samples from the fieldusing chemical fertilizers displayed higher average concentrations of Pb(7.15±1.57mg/kg), As(0.87±0.17 mg/kg), Cr(20.09±4.91 mg/kg), Ni(8.58±2.51 mg/kg) compared tothe organically farmed paddy field. The mean concentrations of the Pb, As, Cr, and Ni inthe soil samples of the organically cultivated field were reported as 2.84±1.06 mg/kg,0.49±0.18 mg/kg, 12.19±3.72 mg/kg, 2.72±1.58 mg/kg respectively. Statistical analysisindicates a significant difference in mean heavy metal concentrations(As, Ni, Cr) betweenorganic and chemically fertilized soil samples(p<0.05). The concentration of Cd in thepaddy soil has not been reported in either of the selected paddy areas. In conclusion, thesustained reduction of chemical fertilizer application over a long-term period maycontribute to the decrease in toxic metal contamination observed in the paddy soil withinorganically cultivated areas. This reduction in contamination subsequently mitigates therisk of the transfer of these toxic metals to the paddy root and grain. },
keywords = {Bioaccumulation, Organic Farming, paddy soil, Sri Lanka, Toxic Metals},
pubstate = {published},
tppubtype = {inproceedings}
}
Given the increasing importance of sustainability in agriculture, this study investigateshow organic farming influences soil toxicity, specifically the accumulation of toxic metalsin paddy fields within the Anamaduwa Divisional Secretariat area. Collections of paddysoil samples were made both from an organically cultivated field and a chemicallyfertilized field. Twenty composite topsoil samples were collected from each paddy fieldaccording to the random sampling method. Soil quality parameters such as soil pH,conductivity, organic matter, total phosphate, potassium, ammonium nitrogen, and ashcontent were analyzed and toxic metal concentrations(Pb, Cd, As, Ni, and Cr) wereanalyzed by Inductively Coupled Plasma–Mass Spectrometry(ICP-MS). Results indicatethe soil collected from paddy areas treated with chemical fertilizers has high average pH,conductivity, total phosphate content, and potassium content. The ammonium nitrogenand ash content were enhanced in the soil collected from organic land and organiccontent fluctuated slightly between the two areas(p>0.05). Soil samples from the fieldusing chemical fertilizers displayed higher average concentrations of Pb(7.15±1.57mg/kg), As(0.87±0.17 mg/kg), Cr(20.09±4.91 mg/kg), Ni(8.58±2.51 mg/kg) compared tothe organically farmed paddy field. The mean concentrations of the Pb, As, Cr, and Ni inthe soil samples of the organically cultivated field were reported as 2.84±1.06 mg/kg,0.49±0.18 mg/kg, 12.19±3.72 mg/kg, 2.72±1.58 mg/kg respectively. Statistical analysisindicates a significant difference in mean heavy metal concentrations(As, Ni, Cr) betweenorganic and chemically fertilized soil samples(p<0.05). The concentration of Cd in thepaddy soil has not been reported in either of the selected paddy areas. In conclusion, thesustained reduction of chemical fertilizer application over a long-term period maycontribute to the decrease in toxic metal contamination observed in the paddy soil withinorganically cultivated areas. This reduction in contamination subsequently mitigates therisk of the transfer of these toxic metals to the paddy root and grain.