In this study, the influence of nitrogen (N) fertilization (170 vs 300 kg N/ha) on the content of bioactive compounds of whole-meal flour of 10 different colored corn genotypes was investigated. Considerable differences in antioxidant capacity and phytochemical concentrations were observed among genotypes. Higher N fertilization rates significantly (P<0.05) increased the content of both total cell-wall bound phenolics and xanthophylls (lutein and zeaxanthin). Nevertheless, the main phenolic acids (ferulic, p-coumaric and sinapic acids), as well as the antioxidant capacity and the content of β-cryptoxanthin, β-carotene and total anthocyanins did not show significant differences as far as the N fertilization rate is concerned. For corn cultivation, the application of high N fertilization rates, generally carried out in order to obtain higher grain yields, could positively influence the content of some bioactives particularly in years characterized by high rainfall levels responsible of a N leaching from the soil.

Influence of agricultural management on phytochemicals of colored corn genotypes (Zea mays L.). Part 1: Nitrogen fertilization

Debora Giordano;Francesca Vanara;Massimo Blandino
Last
2018

Abstract

In this study, the influence of nitrogen (N) fertilization (170 vs 300 kg N/ha) on the content of bioactive compounds of whole-meal flour of 10 different colored corn genotypes was investigated. Considerable differences in antioxidant capacity and phytochemical concentrations were observed among genotypes. Higher N fertilization rates significantly (P<0.05) increased the content of both total cell-wall bound phenolics and xanthophylls (lutein and zeaxanthin). Nevertheless, the main phenolic acids (ferulic, p-coumaric and sinapic acids), as well as the antioxidant capacity and the content of β-cryptoxanthin, β-carotene and total anthocyanins did not show significant differences as far as the N fertilization rate is concerned. For corn cultivation, the application of high N fertilization rates, generally carried out in order to obtain higher grain yields, could positively influence the content of some bioactives particularly in years characterized by high rainfall levels responsible of a N leaching from the soil.
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Zea mays, Colored corn, Nitrogen fertilization, Phenolic acids, Carotenoids, Anthocyanins
Debora Giordano; Trust Beta; Francesca Vanara; Massimo Blandino
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/1671071
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