酸沉降对地表生态系统的影响I.土壤中铝的活化与迁移

土壤中Al的活化与迁移是酸沉降对地表生态系统最突出的影响之一,也是土壤缓冲酸沉降的重要过程。因此土壤中Al的活化迁移过程成为研究和预测地表酸化及其生态效应的关键环节。然而由于土壤系统和Al形态的复杂性,目前的模式并不能充分与实验室和野外的数据相吻合。本文从Al的形态、释放机制和在土壤剖面中迁移过程等方面对近年来的研究工作进行综述和评价,并在此基础之上对今后的研究工作提出展望。

EFFECTS OF ACID PRECIPITATION ON TERRESTRIAL ECOSYSTEM I. MOBILIZATION AND TRANSLOCATION OF ALUMINUM IN SOIL

The mobilization and translocation of aluminum is one of the severest effects of acid precipitation on ecosystem and an important process by which soils significantly buffer the acid deposition. Because of high toxicity of active aluminum, soil aluminum mobilization has been paid much more attention to in both agronomic and eco-environmental researches. But it is unfortunate that current models cannot account for field and experimental data due to complexity of the soil system and aluminum forms. In this paper, a relatively comprehensive review of recent studies on soil aluminum mobilization mechanisms was carried out. Based on the work, some promising prospects were explored for future study.