Influence of nitrogen fertilization on mycotoxin contamination of maize kernels

Blandino, Massimo; Reyneri, Amedeo; Vanara, Francesca

doi:10.1016/j.cropro.2007.05.008

Cited by 64 publications

(60 citation statements)

References 28 publications

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“…Previous studies have linked pre-harvest aflatoxin levels with suboptimal nitrogen fertilization, drought conditions, and increased soil temperatures [22,24,27]. Univariate analyses showed that other soil characteristics were also significantly associated with aflatoxin contamination, but there were few clear trends.…”

Section: Discussionmentioning

confidence: 93%

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Examining environmental drivers of spatial variability in aflatoxin accumulation in Kenyan maize: Potential utility in risk prediction models

Smith

Stasiewicz

Hestrin

et al. 2016

AJFAND

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Maize, a staple food in most African countries, is prone to contamination by aflatoxins, toxic secondary metabolites mainly produced by Aspergillus flavus and A. parasiticus. Aflatoxins are known to cause liver cancer, and chronic exposure has been linked to other adverse health outcomes including growth faltering in children. To mitigate exposure in maize-dependent populations, there is need to identify the factors associated with aflatoxin contamination. This is difficult, however, because of high sampling cost and lack of affordable and accurate analytical methods. Publicly available, remotely-sensed data on vegetation, precipitation, and soil properties could be useful in predicting locations at risk for aflatoxin contamination in maize. This study investigates the utility of publicly available remotely-sensed data on rainfall, vegetation cover (indicated by normalized difference vegetation index or NDVI), and soil characteristics as potential predictors of aflatoxin contamination in Kenyan maize. Aflatoxin was analyzed in maize samples (n=2466) that were collected in 2009 and 2010 at 243 local hammer mills in eastern and western Kenya. Overall, 60% of maize samples had detectable aflatoxin. Global positioning system coordinates of each mill location were linked to remotelysensed, spatially explicit indicators of average monthly NDVI, total monthly rainfall, and soil properties. Higher rainfall and vegetation cover during the maize pre-flowering period were significantly associated with higher prevalence of aflatoxin contamination. Conversely, higher rainfall and vegetation cover during the maize flowering and postflowering periods (not including harvest) were associated with lower prevalence of aflatoxin contamination. Water stress throughout the growing season may cause increased plant susceptibility to fungal colonization and aflatoxin accumulation. Soil organic carbon content, pH, total exchangeable bases, salinity, texture, and soil type were significantly associated with aflatoxin. In conclusion, this study shows that remotelysensed data can be regressed on available aflatoxin data highlighting important potential predictors that could reduce the cost of data collection and the cost of aflatoxin risk forecasting models.

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Section: Discussionmentioning

confidence: 93%

“…Sub-optimal nitrogen availability and high planting density have been associated with aflatoxin contamination [27][28][29]. Soil properties can affect water retention and nutrient availability, thereby influencing plant health and susceptibility to fungal colonization and aflatoxin production [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Examining environmental drivers of spatial variability in aflatoxin accumulation in Kenyan maize: Potential utility in risk prediction models

Smith

Stasiewicz

Hestrin

et al. 2016

AJFAND

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“…Blandino et al (2008) relataram que, por falta de nitrogênio, o estresse aumenta significativamente a contaminação de milho por FB 1 . Paralelamente, os baixos níveis de fumonisinas podem ter sido reflexo também das condições climáticas (restrições hídricas) durante o desenvolvimento da cultura no campo (Figura 1).…”

Section: Resultsunclassified

“…O suprimento inadequado de nitrogênio e fósforo é um dos fatores limitantes ao rendimento de grãos. Aliadas a isto, plantas de milho expostas ao estresse por falta de fertilidade do solo são altamente susceptíveis à infecção por fungos toxigênicos (Blandino et al, 2008).…”

Section: Introductionunclassified

Inoculação de Pseudomonas fluorescens e adubação NPK na composição química e contaminação fungo-fumonisina de milho

Bernd¹,

Souza²,

Oliveira³

et al. 2014

Rev. bras. eng. agríc. ambient.

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R E S U M OPropôs, neste trabalho, avaliar o efeito da inoculação de sementes com Pseudomonas fluorescens e adubação NPK (nitrogênio, fósforo e potássio) na composição química e contaminação por fungo-fumonisina de grãos de milho. O delineamento experimental foi bloco casualizado em fatorial 2 x 3, correspondente à inoculação com P. fluorecens (não inoculada ou inoculada) e níveis de adubação NPK (0, 125 e 250 kg ha -1 , formulados 08-28-16) com 4 repetições. Os parâmetros avaliados foram composição química (proteína e cinzas), contaminação fúngica (bolores e leveduras) e fumonisinas B 1 (FB 1 ) e B 2 (FB 2 ). Os dados foram submetidos à análise de variância, comparação de médias pelo teste de Tukey e correlação de Pearson, pelo teste-t (p < 0,05). Inoculação com P. fluorescens e adubação mineral não apresentaram efeito individual sobre os parâmetros avaliados (p > 0,05). A interação entre fatores, com incremento no nível de adubação NPK e uso de P. Fluorescens, resultou em aumento no teor de cinzas e proteína (p < 0,05) e reduziu a contaminação por leveduras no grão, favorecendo o crescimento de Fusarium spp. (r = -0,40; p < 0,05). Os níveis de fumonisinas totais (FB 1 + FB 2 ) observados estão enquadrados nos limites máximos tolerados, estabelecidos por órgãos de vigilância sanitária. Inoculation of Pseudomonas fluorescens and NPK fertilization on chemical composition and fungal-fumonisin contamination of maize A B S T R A C TThe study aimed to evaluate the effect of inoculation of seeds with Pseudomonas fluorescens and NPK fertilization (nitrogen, phosphorus and potassium) on chemical composition and contamination by fungal-fumonisin of maize grains. The experiment was conducted in randomized block design in factorial 2 x 3, corresponding to inoculation with P. fluorescens (non-inoculated or inoculated) and levels of NPK fertilization (0, 125 and 250 kg ha -1 , formulation 8-28-16), with 4 replications. The parameters evaluated were chemical composition (protein and ash), contamination by fungal (mold and yeast) and fumonisins B 1 (FB 1 ) and B 2 (FB 2 ). The data were subjected to analysis of variance, comparisons of means by Tukey test and Pearson correlation by test-t (p < 0.05). Inoculation with P. fluorescens and mineral fertilizer as an isolated factor did not affect the parameters evaluated (p > 0.05). The interaction between factors, increase in NPK level and use of P. fluorescens, resulted in increase in protein content and ash (p < 0.05), and reduction in contamination by yeast of the grain, favoring the growth of Fusarium sp. (r = -0.40, p < 0.05). The levels of total fumonisins (FB 1 +FB 2 ) observed are above the maximum tolerated limit established by health surveillance agencies. Palavras

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“…Crop nutrition stresses, e.g., nitrogen deficiency, have been associated with high aflatoxin levels (Lisker and Lillehoj 1991). Therefore, balanced N fertilizer application is the best approach for low mycotoxin contamination (Blandino et al 2008).…”

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confidence: 99%

Effect of cropping systems and crop successions on fumonisin levels in corn from Northern Paraná State, Brazil

et al. 2011

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In this study the effect of different cropping systems and crop successions was evaluated on natural Fusarium sp. contamination and fumonisin levels in corn. The cropping systems consisted of a conventional and no-tillage area cultivated with corn in the summer following either oats or fallow in the winter (2006 and 2007 growing seasons). In addition, the effect of applying nitrogen fertilizer (0, 22.5, 45.0, 90.0 and 90.0 kg ha −1 nitrogen supplemented with potassium oxide) on fumonisin contamination was evaluated in the 2006 growing season. Fusarium sp. was detected in 90% samples in 2006 and in 100% samples in 2007. In both growing seasons, no-till corn following oats showed the highest mean fumonisin levels and differed significantly (P<0.05) from all the others (2006) and from conventional till corn following either oats or fallow in the winter (2007). Fumonisin levels ranged from 0.13 to 19.52 μg g −1 (mean 6.97 μg g −1 ) and from 3.70 to 7.75 μg g −1 (mean 6.29 μg g −1 ) in no-till corn following oats from the 2006 and 2007 growing seasons, respectively. Plots treated with 0 kg ha −1 and 22.5 kg ha −1 nitrogen showed the highest mean fumonisin levels and differed significantly from those with 45.0 and 90 kg ha −1 nitrogen. Fumonisin levels correlated negatively (P<0.05) with the nitrogen fertilization rates. Although no-till is advantageous from a soil conservation standpoint, it may enhance the potential for fumonisin contamination in corn.

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Influence of nitrogen fertilization on mycotoxin contamination of maize kernels

Cited by 64 publications

References 28 publications

Examining environmental drivers of spatial variability in aflatoxin accumulation in Kenyan maize: Potential utility in risk prediction models

Examining environmental drivers of spatial variability in aflatoxin accumulation in Kenyan maize: Potential utility in risk prediction models

Inoculação de Pseudomonas fluorescens e adubação NPK na composição química e contaminação fungo-fumonisina de milho

Effect of cropping systems and crop successions on fumonisin levels in corn from Northern Paraná State, Brazil

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