Quantitative studies on the water and nutrient enrichment of throughfall and stemflow in the Cerrado are lacking, especially among tree species. This work tested the hypothesis that the chemistry of rainfall fractions is altered after passing through the canopy and that the chemistry of stemflow can substantially change among tree species. We compared the nutrient concentrations in rainfall, throughfall and stemflow, dry deposition and canopy exchange among eight Cerrado species in Brazil. Rainfall, throughfall and stemflow were monitored from April 2018 to March 2019. The following chemical factors were determined using a Metrohm liquid chromatograph ECO IC: Na²⁺, K⁺, Ca²⁺, Mg²⁺, Br⁻, Cl⁻, ${\text{NO}}_3^{-},{\text{SO}}_4^{2-}$and ${\text{PO}}_4^{3-}$. The enrichment ratio, depositions of rainfall, throughfall and stemflow and canopy budget of different nutrients were calculated for the stand and species. A comparison between the mean concentrations showed that most of the elements and compounds were relatively more concentrated in the throughfall and stemflow, except for Na²⁺and Ca²⁺, which were more concentrated in the rainfall (p<0.05). We noted that each species had a specific contribution to the stemflow nutrients. The different components and canopy geometry, as well as the bark morphology of the studied species, contributed varying proportions to the nutrient fluxes. The stemflow deposition of most nutrients was significantly higher in Xylopia aromatica. The highest nutrient input by stemflow was observed for K⁺, which ranged from 2.13 (A. peregrina) to 77.36 (X. aromatica) kg ha⁻¹ y ^− 1. A canopy budget model indicated that canopy exchange was often more dominant than dry deposition. Unlike the other nutrients, Cl⁻ and ${\text{PO}}_4^{3-}$ were taken up by the canopy. Given the variation in the nutrient input, these results highlight the importance of investigating the individual contribution of the stemflow of each species in the Cerrado forest and provide a potential strategy for adapting the species to soil recovery.

缺乏关于塞拉多河中穿透和茎流的水和养分富集的定量研究，尤其是在树种之间。这项工作检验了以下假设：降雨分数的化学成分在穿过树冠后发生了变化，并且茎流的化学成分在树种之间可能发生显着变化。我们比较了巴西8个塞拉多（Cerrado）物种在降雨，穿透流和茎流，干沉降和冠层交换中的养分含量。雨量，穿透和茎流是从2018年4月监测，以2019年三月使用万通液相色谱ECO IC测定以下化学因素：钠²⁺，ķ ⁺，钙²⁺，镁²⁺，溴^- ，氯⁻，${\text{不}}_3^{-}，{\text{所以}}_4^{\mathrm{2个}-}$和 ${\text{采购订单}}_4^{3-}$。计算了林分和物种的富集率，降雨沉积，通流和茎流以及不同养分的冠层预算。平均浓度之间的比较表明，除Na ²⁺和Ca ²⁺以外，大多数元素和化合物相对更集中于通流和茎流中（p <0.05）。我们注意到每种物种对茎流养分都有特定的贡献。所研究物种的不同组成和冠层几何形状以及树皮形态对养分通量的贡献比例各不相同。最营养的树干流沉积在显著高于Xylopia郁金。观察到由树干流的最高养分输入ķ ⁺，它从2.13（范围A.蝇）到77.36（X.郁金）公斤公顷^-1 ý  ^{-  1}。冠层预算模型表明，冠层交换通常比干沉降更占优势。不像其他的营养物质，氯^-和${\text{采购订单}}_4^{3-}$被树冠占据了。考虑到养分输入的变化，这些结果凸显了调查塞拉多森林中每个物种的茎流的个体贡献的重要性，并提供了使该物种适应土壤恢复的潜在策略。