Autor: |
Mie, Axel, Novak, Vlastimil, Franko, Mikael Andersson, Bügel, Susanne Gjedsted, Laursen, Kristian Holst |
Zdroj: |
Journal of Agricultural and Food Chemistry; March 2022, Vol. 70 Issue: 11 p3391-3399, 9p |
Abstrakt: |
The stable nitrogen isotope ratio δ15N is used as a marker of dietary protein sources in blood. Crop fertilization strategies affect δ15N in plant foods. In a double-blinded randomized cross-over dietary intervention trial with 33 participants, we quantified the effect of fertilizer type (conventional: synthetic fertilizer and organic: animal or green manure) on δ15N in blood plasma. At study baseline, plasma δ15N was +9.34 ± 0.29‰ (mean ± standard deviation). After 12 days intervention with a diet based on crops fertilized with animal manure, plasma δ15N was shifted by +0.27 ± 0.04‰ (mean ± standard error) compared to synthetic fertilization and by +0.22 ± 0.04‰ compared to fertilization with green manure (both p< 0.0001). Accordingly, differences in the δ15N values between fertilizers are propagated to the blood plasma of human consumers. The results indicate a need to consider agricultural practices when using δ15N as a dietary biomarker. |
Databáze: |
Supplemental Index |
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