AI Article Synopsis
- Brown rice is linked to lower risks of chronic diseases, and this study focused on how different nitrogen fertilizer levels affect its bioactive compounds and antioxidant properties.
- At nitrogen levels of 210-260 kg N/100 m, the highest levels of total flavonoids, β-sitosterol, and stigmasterol, as well as strong antioxidant activity were found.
- The research highlighted significant relationships between these compounds and antioxidant effectiveness, suggesting that optimal nitrogen fertilization (around 210 kg N/100 m) enhances both the nutritional quality and antioxidant capacity of brown rice.
Article Abstract
Brown rice as a whole grain food is associated with various chronic diseases' reduced risks. In this study, the effects of different doses of nitrogen fertilization (0, 160, 210, 260, 315, and 420 kg N/ 100 m) on bioactive compounds and antioxidant activity of brown rice (yanfeng47) were investigated. At nitrogen level of 210-260 kg N/100 m, the content of TFC (302.65 mg/100 g), β-sitosterol (1762.92 mg/100 g), stigmasterol (1358.735 mg/100 g), DPPH (74.57%), and OH free radical scavenging (74.19%) was the highest. The major phenolic acid was p-hydroxybenzoic acid. There were significant positive linear relationships between TFC (0.872, 0.843), β-sitosterol (0.896, 0.657), stigmasterol (0.543, 0.771), p-hydroxybenzoic acid (0.871, 0.875), and DPPH, OH antioxidant activity. These indicated that TFC and phytosterols were the most important components in brown rice that had strong antioxidant activity. Composite score of principal components indicated 210 Kg N/100 m exhibited a more ideal dose of nitrogen for nutritional composition and antioxidant activity of brown rice.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9936061 | PMC |
| http://dx.doi.org/10.3389/fnut.2023.1071874 | DOI Listing |
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