Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Cycle biogéochimique de l’aluminium. Influence d’une substitution d’espèce : remplacement du chêne (Quercus sessiliflora) par de l’épicéa commun (Picea abies). | Ann. Sci. For. 1988 45 3 189-208 Cycle biogệochimiquẹ de I aluminium. Influence d une substitution d espece remplacement du chêne Quercus sessiliflora par de 1 épicéa commun Picea abies c. NYS avec la collaboration technique de Louisette GELHAYE et D. GELHAYE ỈNRA Station de Recherches sur le Sol la Microbiologie et la Nutrition des Arbres forestiers. Centre de Recherches de Nancy Champenoux F 54280 Seichamps Summary The biogeochemical cycle of aluminium the effect of replacing oak forest Ouercus sessiliflora by Norway spruce Picea abies The substitution of oak forest by Norway spruce induces changes in the physico-chemical properties of soil and in the dynamics of the biogeochemical cycle of elements. Aluminium is a good indicator of pedogenesis. Do conifers induce podzolisation in an acid brown earth soil sol brun acide In the French Ardennes on a brown soil after the substitution of tree species the mull humus under the oak forest became a moder after 50 years of spruce cultivation. The consequence of the change on the soil chemical properties is an increase in exchangeable acidity fig. 2 in the litter and the upper organic layer of the soil A . In relation to the increase of organic matter the . and the Al concentration are greater under spruce fig. 3 in the A level but the acidity ratio AI . remains the same. In figure 4 the weathering complex shows higher levels of translocation of free Al under spruce with adsorption in the B horizon. That is typical under the deciduous forest of a sol brun acide and under the spruce forest of a sol brun ocreux . The evolution of the soil towards the podzolic group due to conifer plantation has been verified by a study of flux and in particular the Al flux in the ecosystems. Aluminium flux has been evaluated in the two ecosystems using lysimeter techniques. A comparison of Al distribution in the two ecosystems shows that no difference exists in the upper part of ecosystems similar biological cycles current .
