The aim of this study was to determine the content, distribution and behaviour of Al in soils under beech forest with different parent rock, and to assess the role of herbaceous vegetation on soil Al behaviour. We hypothesize that the contents of elements in the soil sorption complex (Al etc.) are strongly influenced by vegetation cover. Also, low molecular mass organic acids (LMMOA) can be considered as an indicator of soil organic matter (SOM) decomposition and vegetation litter turnover. Speciation of LMMOA, nutrition content (PO₄^3 −, Ca^2 +, K ⁺) and element composition in aqueous extracts were determined by means of ion chromatography and inductively coupled plasma - optical emission spectrometry (ICP-OES) respectively. Active and exchangeable pH, sorption characteristics and exchangeable Al (Al_ex) were determined in BaCl₂ extracts by ICP-OES. Elemental composition of parent rocks was assessed by means of X-ray fluorescence spectroscopy. Herb-poor localities showed lower pH, less nutrients (PO₄^3 −, Ca^2 +, K ⁺), less LMMOA, a larger stock of SOM and greater cation exchange capacity. There was also lower mobilisation of Al in organic horizons, which explains the larger pools of Al. Generally, we can conclude that LMMOA, and thus soil vegetation cover, play an important role in the Al soil cycle.

这项研究的目的是确定不同母岩的山毛榉林下土壤中铝的含量，分布和行为，并评估草本植物对土壤铝行为的作用。我们假设土壤吸附复合物（Al等）中元素的含量受到植被覆盖的强烈影响。此外，低分子量有机酸（LMMOA）可以被视为土壤有机物（SOM）分解和枯枝落叶更新的指标。LMMOA的形态，营养成分（PO ₄ ^3-，Ca ^{2 +}，K  ⁺）和水萃取液中的元素组成分别通过离子色谱法和电感耦合等离子体发射光谱法（ICP-OES）进行测定。ICP-OES测定了BaCl ₂萃取液中的活性和可交换的pH，吸附特性和可交换的Al（Al _ex）。通过X射线荧光光谱法评估母体岩石的元素组成。草药贫乏的地区显示出较低的pH值，较少的养分（PO ₄ ^3-，Ca ^{2 +}，K  ⁺），LMMOA减少，SOM的库存增加和阳离子交换能力增加。有机层中的铝动员程度也较低，这说明了铝的储量更大。通常，我们可以得出结论，LMMOA以及土壤植被的覆盖在Al土壤循环中起着重要作用。