Natural abundance analysis of the role played by 15N as indicator for the certification of organic‐system deriving food
2022
Trapp, Talita | Inácio, Caio de Teves | Ciotta, Marlise Nara | Hindersmann, Jacson | Lima, Andria Paula | dos Santos, Thiago Stacowski | Ferreira, Guilherme Wilbert | Morais, Gildean Portela | de Conti, Lessandro | Comin, Jucinei José | Loss, Arcângelo | Giacomini, Sandro José | Lourenzi, Cledimar Rogério | Rozane, Danilo Eduardo | Brunetto, Gustavo
BACKGROUND: The natural abundance of stable isotope ¹⁵N (δ¹⁵N) in production systems has emerged as an alternative to distinguish organic products from conventional ones. This study evaluated the use of δ¹⁵N values recorded for nitrogen fertilizers, soil and plant tissue in order to set the differences between organic and conventional agricultural production systems applied to rice, potatoes, apple and banana crops. RESULTS: Values of δ¹⁵N recorded for N sources ranged from +5.58‰ to +18.27‰ and from −3.55‰ to +3.19‰ in organic and synthetic fertilizers, respectively. Values recorded for δ¹⁵N in food from organic rice, potatoes and banana farms were higher than values recorded for δ¹⁵N in conventional farms; the same was observed for values recorded for δ¹⁵N in leaves from the four crops. CONCLUSION: Results have allowed for differentiation between production systems due to values of δ¹⁵N recorded in leaves of all crops and food, for rice, potatoes and banana trees. © 2021 Society of Chemical Industry.
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