CRA - Centro di Ricerca per l'Agrumicoltura e le Colture Mediterranee, Corso Savoia 190, Acireale (CT), Italy.
J Agric Food Chem. 2010 Mar 24;58(6):3502-6. doi: 10.1021/jf903952v.
To investigate the influence of different types of fertilizers on quality parameters, N-containing compounds, and the delta(15)N, delta(13)C, delta(2)H, delta (34)S, and delta(18)O values of citrus fruit, a study was performed on the orange fruit cv. 'Valencia late' (Citrus sinensis L. Osbeck), which was harvested in four plots (three organic and one conventional) located on the same farm. The results demonstrated that different types of organic fertilizers containing the same amount of nitrogen did not effect important changes in orange fruit quality parameters. The levels of total N and N-containing compounds such as synephrine in fruit juice were not statistically different among the different treatments. The delta(15)N values of orange fruit grown under fertilizer derived from animal origin as well as from vegetable compost were statistically higher than those grown with mineral fertilizer. Therefore, delta(15)N values can be used as an indicator of citrus fertilization management (organic or conventional), because even when applied organic fertilizers are of different origins, the natural abundance of (15)N in organic citrus fruit remains higher than in conventional ones. These treatments also did not effect differences in the delta(13)C, delta(2)H, delta(34)S, and delta(18)O values of fruit.
为了研究不同类型肥料对柑橘品质参数、含氮化合物以及柑橘果实的 δ(15)N、δ(13)C、δ(2)H、δ(34)S 和 δ(18)O 值的影响，在同一农场的三个有机地块和一个常规地块上，对‘晚熟脐橙’（Citrus sinensis L. Osbeck）果实进行了研究。结果表明，含等量氮的不同类型有机肥并未对柑橘果实品质参数产生重要影响。果汁中总氮和诸如辛弗林等含氮化合物的水平在不同处理之间没有统计学差异。动物源肥料和蔬菜堆肥施用于果实中导致的 δ(15)N 值明显高于矿物肥。因此，δ(15)N 值可作为柑橘施肥管理（有机或常规）的指标，因为即使使用不同来源的有机肥，有机柑橘果实中的天然 (15)N 丰度仍高于常规柑橘。这些处理也不会影响果实的 δ(13)C、δ(2)H、δ(34)S 和 δ(18)O 值的差异。
