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Báo cáo toán học: "mpact of dolomite lime on the ground vegetation and on potential net N transformations in Norway spruce (Picea abies (L.) Karst.) and sessile oak (Quercus petraea (Matt.) Lieb.) stands in the Belgian Ardenne"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Impact of dolomite lime on the ground vegetation and on potential net N transformations in Norway spruce (Picea abies (L.) Karst.) and sessile oak (Quercus petraea (Matt.) Lieb.) stands in the Belgian Ardenne. | 361 Ann. For. Sci. 56 1999 361-370 Inra Elsevier Paris Original article Impact of dolomite lime on the ground vegetation and on potential net N transformations in Norway spruce Picea abỉes L. Karst. and sessile oak Quercus petraea Matt. Lieb. stands in the Belgian Ardenne Jean-Franẹois Dulièrea b Monique Carnolc Shanti Dalemc Jean Remaclec Francois Malaisseb a Faculte des sciences biologie végétale université de Mons-Hainaut avenue Maistriau 23 7000 Mons Belgium hLaboratoire d ecologie faculte universitaire des sciences agronomiques passage des déportés 2 5030 Gembloux Belgium c Departement de botanique B22 écologie microbienne et radioécologie université de Liège Sart Tilman 4000 Liège Belgium Received 15 September 1998 accepted 25 November 1998 Abstract - The impact of dolomite lime 5 T ha on the ground vegetation and on potential net nitrogen N transformations was investigated in two Belgian forest ecosystems. Norway spruce Picea abies L. Karst. and sessile oak Quercus petraea Matt. Lieb. stands were situated in the Haute Ardenne east Belgium on acid-brown soil. The herb-layer floristic richness increased during the 2 years following liming with the appearance of light and N-demanding species which are also found in clear-cut areas or on road verges. Mosses reacted rapidly showing a decrease acidophilous-dominant species and the establishment of some ruderal species. Six months after liming the pH was significantly increased in the organic horizon of both stands and in the organomineral horizon of the oak stand. Soils originating from the two stands showed distinct responses in net NO production to the dolomite lime treatment. In the organic layer of the Quercus soil net NH4 production was decreased NO production increased and total N mineralisation remained unchanged. In the organomineral layer NO production was increased. In the Picea soil NO production was decreased in the organomineral soil layer. These results indicate the possibility of differences in the