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Predicting aflatoxin content in peanuts using ambient temperature, soil temperature and soil moisture content during pod development

OAR@ICRISAT

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Relation http://oar.icrisat.org/11390/
https://doi.org/10.5897/AJPS2018.1742
doi:10.5897/AJPS2018.1742
 
Title Predicting aflatoxin content in peanuts using ambient temperature, soil temperature and soil moisture content during pod development
 
Creator Hendrix, M C
Obed, I L
Alice, M M
Elijah, P
Jones, Y
Njoroge, S M C
Rick, L B
David, J
 
Subject Zambia
Statistical Models
Groundnut
Soil Science
Aflatoxins
 
Description Higher than acceptable aflatoxin levels in peanut kernels (Arachis hypogaea L.) and related products is
a worldwide food safety concern. Strict regulatory standards by major importers of peanuts limit the
marketability of peanuts for many developing tropical countries including Zambia. The incidence of preharvest
aflatoxins is strongly linked to soil and weather conditions during pod-development. This study
aimed to formulate statistical models to predict total aflatoxin content in peanut kernels using selected
environmental factors during pod development. Field experiments were conducted for two years during
which the peanut crop was exposed to 84 combinations of ambient temperature, soil temperature and
soil moisture content measured during the last 30 days of pod development. These data were used to
formulate regression models to predict total aflatoxin content in peanut kernels. Simple linear
regression models had R2 values of 0.30 for maximum ambient temperature, 0.24 for soil temperature
and 0.38 for soil moisture content. Combining soil moisture content and soil temperature in a
multivariate regression model could explain 54% of the variation in total aflatoxin content while a
combination of soil moisture content and maximum ambient temperature could only explain 46% of the
variation in total aflatoxin content.
 
Publisher Academic Journals
 
Date 2019-03
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11390/1/ea79eb09acc678531ebbaf643126ebbddaa1.pdf
Hendrix, M C and Obed, I L and Alice, M M and Elijah, P and Jones, Y and Njoroge, S M C and Rick, L B and David, J (2019) Predicting aflatoxin content in peanuts using ambient temperature, soil temperature and soil moisture content during pod development. African Journal of Plant Science, 13 (3). pp. 59-69. ISSN 1996-0824