Climate warming affects nitrogen (N) cycling in forest soils, but implications for plant available N have remained unclear. We estimated in situ diffusive fluxes of amino acids and inorganic N in a temperate forest soil after 14 years of soil warming. Results from four sampling campaigns (n = 1152 microdialysis samples) during the growing season showed no effect of warming on diffusive N fluxes. Diffusive NH₄⁺ fluxes increased from spring towards autumn while NO₃⁻ fluxes followed an opposite trend. Overall, the proportion of amino acids in the total diffusive N flux was low (13–30%) in this carbonate soil compared to other temperate and boreal forest soils.

气候变暖影响森林土壤中的氮（N）循环，但是对植物可用氮的影响仍不清楚。我们估算了土壤变暖14年后温带森林土壤中氨基酸和无机氮的原位扩散通量。生长季节期间的四个采样活动（n = 1152个微透析样品）的结果表明，变暖对扩散氮通量没有影响。漫射NH _4个⁺通量从弹簧朝增加而秋NO ₃ ^-通量遵循相反的趋势。总体而言，与其他温带和北方森林土壤相比，这种碳酸盐土壤中氨基酸在总扩散氮通量中的比例较低（13–30％）。