Department of Soil Science and Soil Protection, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague - Suchdol, Czech Republic.
Department of Soil Science and Soil Protection, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague - Suchdol, Czech Republic.
J Inorg Biochem. 2018 Apr;181:139-144. doi: 10.1016/j.jinorgbio.2017.09.017. Epub 2017 Sep 20.
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 (PO, Ca, 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) were determined in BaCl 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 (PO, Ca, 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.
本研究旨在确定不同母岩下的山毛榉林土壤中铝的含量、分布和行为，并评估草本植被对土壤铝行为的作用。我们假设土壤吸附复合体（如铝等）中元素的含量受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质（SOM）分解和植被凋落物周转的指标。通过离子色谱法和电感耦合等离子体 - 光学发射光谱法（ICP-OES）分别测定了 LMMOA 的形态、营养成分（PO、Ca、K）和水提取液中的元素组成。通过 ICP-OES 测定 BaCl 提取液中的活性和可交换 pH 值、吸附特性和可交换铝（Al）。通过 X 射线荧光光谱法评估母岩的元素组成。草本植物匮乏的地方表现出较低的 pH 值、较少的营养物质（PO、Ca、K）、较少的 LMMOA、较大的 SOM 储量和更大的阳离子交换能力。有机层中铝的迁移率也较低，这解释了更大的铝库。总的来说，我们可以得出结论，LMMOA，因此土壤植被覆盖，在铝的土壤循环中起着重要作用。
