Impact of soil-type, soil-pH, and soil-metal(loids) on grain-As and Cd accumulation in Malawian rice grown in three regions of Malawi

Jörg Feldmann; Gareth Norton; Andrea Raab; Shaun Thomas Lancaster; Angstone Mlangeni; Eva Krupp

doi:10.1016/j.envadv.2021.100145

Impact of soil-type, soil-pH, and soil-metal(loids) on grain-As and Cd accumulation in Malawian rice grown in three regions of Malawi

Jörg Feldmann, Gareth Norton, Andrea Raab, Shaun Thomas Lancaster, Angstone Mlangeni^* (Corresponding Author), Eva Krupp

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

Impact of soil type, soil metal(loids) and soil-pH of rice paddies on grain-arsenic (As) and cadmium (Cd) accumulation in Malawian rice was investigated to explore the extent to which Malawi's geographical location, soil types, soil-metal(loids) and soil-pH and their interactions impact on grain-As and Cd accumulation. Multivariate techniques were used to evaluate the relationships among measured parameters. Results showed that the 1st three principal components consisting of soil-types, soil-metal(loids) and soil-pH explained 83% of total variance of both grain-As and Cd accumulation. For As, highest grain-As was detected in rice from central region (CR) cultivated in vertisols characterized with soil-As ≥ 2.5 mg/kg and soil-pH > 7.0 whereas the lowest was in rice from northern region (NR) cultivated in fluvisols characterized with soil-[As] ≤ 1.5 mg As/kg soil and soil-pH range of 6.00–6.99. For Cd, highest grain-Cd was detected in rice from CR cultivated in luvisols with soil-As range of 2.0–3.0 mg/kg and soil-pH < 6.0. For correlation, highest significant correlation coefficient was between soil-As and grain-As (0.512; p < 0.001); and soil-pH and soil-As (0.545; p < 0.001) while correlation coefficient between soil-Cd and grain-Cd and soil-Cd and grain-As were weaker and/or non-significant. These results indicate a synergy impact of soil type, soil-pH, and soil-metal(loids) that simultaneously influence low grain-As and Cd accumulation.

Original language	English
Article number	100145
Number of pages	11
Journal	Environmental Advances
Volume	7
Early online date	5 Dec 2021
DOIs	https://doi.org/10.1016/j.envadv.2021.100145
Publication status	Published - Apr 2022

Bibliographical note

The authors thank the UK government for providing scholarship to Dr Angstone Thembachako Mlangeni (ATM), a commonwealth scholar MWCS-2015-334 and the Natural Resource College for providing funds for fieldwork. ATM also thanks Dr Magali Perez, Luke D. Harrold, and Michael William McGibbon for providing useful instrumentation support.

Data Availability Statement

Supplementary material associated with this article can be found, in
the online version, at doi:10.1016/j.envadv.2021.100145.

Keywords

Rice
Arsenic
Cadmium
Soil types
Soil chemistry

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Mlangeni_etal_EA_Impact_Soil_Type_VoR
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Cite this

@article{7e272a0d9f914d679489ff06bc6522be,

title = "Impact of soil-type, soil-pH, and soil-metal(loids) on grain-As and Cd accumulation in Malawian rice grown in three regions of Malawi",

abstract = "Impact of soil type, soil metal(loids) and soil-pH of rice paddies on grain-arsenic (As) and cadmium (Cd) accumulation in Malawian rice was investigated to explore the extent to which Malawi's geographical location, soil types, soil-metal(loids) and soil-pH and their interactions impact on grain-As and Cd accumulation. Multivariate techniques were used to evaluate the relationships among measured parameters. Results showed that the 1st three principal components consisting of soil-types, soil-metal(loids) and soil-pH explained 83% of total variance of both grain-As and Cd accumulation. For As, highest grain-As was detected in rice from central region (CR) cultivated in vertisols characterized with soil-As ≥ 2.5 mg/kg and soil-pH > 7.0 whereas the lowest was in rice from northern region (NR) cultivated in fluvisols characterized with soil-[As] ≤ 1.5 mg As/kg soil and soil-pH range of 6.00–6.99. For Cd, highest grain-Cd was detected in rice from CR cultivated in luvisols with soil-As range of 2.0–3.0 mg/kg and soil-pH < 6.0. For correlation, highest significant correlation coefficient was between soil-As and grain-As (0.512; p < 0.001); and soil-pH and soil-As (0.545; p < 0.001) while correlation coefficient between soil-Cd and grain-Cd and soil-Cd and grain-As were weaker and/or non-significant. These results indicate a synergy impact of soil type, soil-pH, and soil-metal(loids) that simultaneously influence low grain-As and Cd accumulation.",

keywords = "Rice, Arsenic, Cadmium, Soil types, Soil chemistry",

author = "J{\"o}rg Feldmann and Gareth Norton and Andrea Raab and Lancaster, {Shaun Thomas} and Angstone Mlangeni and Eva Krupp",

note = "The authors thank the UK government for providing scholarship to Dr Angstone Thembachako Mlangeni (ATM), a commonwealth scholar MWCS-2015-334 and the Natural Resource College for providing funds for fieldwork. ATM also thanks Dr Magali Perez, Luke D. Harrold, and Michael William McGibbon for providing useful instrumentation support.",

year = "2022",

month = apr,

doi = "10.1016/j.envadv.2021.100145",

language = "English",

volume = "7",

journal = "Environmental Advances",

issn = "2666-7657",

publisher = "Elsevier",

}

TY - JOUR

T1 - Impact of soil-type, soil-pH, and soil-metal(loids) on grain-As and Cd accumulation in Malawian rice grown in three regions of Malawi

AU - Feldmann, Jörg

AU - Norton, Gareth

AU - Raab, Andrea

AU - Lancaster, Shaun Thomas

AU - Mlangeni, Angstone

AU - Krupp, Eva

N1 - The authors thank the UK government for providing scholarship to Dr Angstone Thembachako Mlangeni (ATM), a commonwealth scholar MWCS-2015-334 and the Natural Resource College for providing funds for fieldwork. ATM also thanks Dr Magali Perez, Luke D. Harrold, and Michael William McGibbon for providing useful instrumentation support.

PY - 2022/4

Y1 - 2022/4

N2 - Impact of soil type, soil metal(loids) and soil-pH of rice paddies on grain-arsenic (As) and cadmium (Cd) accumulation in Malawian rice was investigated to explore the extent to which Malawi's geographical location, soil types, soil-metal(loids) and soil-pH and their interactions impact on grain-As and Cd accumulation. Multivariate techniques were used to evaluate the relationships among measured parameters. Results showed that the 1st three principal components consisting of soil-types, soil-metal(loids) and soil-pH explained 83% of total variance of both grain-As and Cd accumulation. For As, highest grain-As was detected in rice from central region (CR) cultivated in vertisols characterized with soil-As ≥ 2.5 mg/kg and soil-pH > 7.0 whereas the lowest was in rice from northern region (NR) cultivated in fluvisols characterized with soil-[As] ≤ 1.5 mg As/kg soil and soil-pH range of 6.00–6.99. For Cd, highest grain-Cd was detected in rice from CR cultivated in luvisols with soil-As range of 2.0–3.0 mg/kg and soil-pH < 6.0. For correlation, highest significant correlation coefficient was between soil-As and grain-As (0.512; p < 0.001); and soil-pH and soil-As (0.545; p < 0.001) while correlation coefficient between soil-Cd and grain-Cd and soil-Cd and grain-As were weaker and/or non-significant. These results indicate a synergy impact of soil type, soil-pH, and soil-metal(loids) that simultaneously influence low grain-As and Cd accumulation.

AB - Impact of soil type, soil metal(loids) and soil-pH of rice paddies on grain-arsenic (As) and cadmium (Cd) accumulation in Malawian rice was investigated to explore the extent to which Malawi's geographical location, soil types, soil-metal(loids) and soil-pH and their interactions impact on grain-As and Cd accumulation. Multivariate techniques were used to evaluate the relationships among measured parameters. Results showed that the 1st three principal components consisting of soil-types, soil-metal(loids) and soil-pH explained 83% of total variance of both grain-As and Cd accumulation. For As, highest grain-As was detected in rice from central region (CR) cultivated in vertisols characterized with soil-As ≥ 2.5 mg/kg and soil-pH > 7.0 whereas the lowest was in rice from northern region (NR) cultivated in fluvisols characterized with soil-[As] ≤ 1.5 mg As/kg soil and soil-pH range of 6.00–6.99. For Cd, highest grain-Cd was detected in rice from CR cultivated in luvisols with soil-As range of 2.0–3.0 mg/kg and soil-pH < 6.0. For correlation, highest significant correlation coefficient was between soil-As and grain-As (0.512; p < 0.001); and soil-pH and soil-As (0.545; p < 0.001) while correlation coefficient between soil-Cd and grain-Cd and soil-Cd and grain-As were weaker and/or non-significant. These results indicate a synergy impact of soil type, soil-pH, and soil-metal(loids) that simultaneously influence low grain-As and Cd accumulation.

KW - Rice

KW - Arsenic

KW - Cadmium

KW - Soil types

KW - Soil chemistry

U2 - 10.1016/j.envadv.2021.100145

DO - 10.1016/j.envadv.2021.100145

M3 - Article

SN - 2666-7657

VL - 7

JO - Environmental Advances

JF - Environmental Advances

M1 - 100145

ER -

Impact of soil-type, soil-pH, and soil-metal(loids) on grain-As and Cd accumulation in Malawian rice grown in three regions of Malawi

Abstract

Bibliographical note

Data Availability Statement

Keywords

Access to Document

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