Nutrient uptake of a mixed oak/beech forest in Flanders (Belgium)
1998
Mussche, S. | Bussche, B. | Schrijver, A. de | Neirynck, J. | Nachtergale, L. | Lust, N. (Gent Univ. (Belgium). Lab. of Forestry)
A 72-year-old mixed oak/beech stand has been studied on the element (N, P, K, Ca and Mg) content in its woody biomass, in the wood increment and in the litter fall. Crown leaching and nutrient uptake have been calculated respectively according to Ulrich (1983) and to Cole & Rapp (1981). Eight oaks and six beeches have been sampled, regression equations between the tree element content and the stem volume have been calculated in order to scale up from the tree to the stand level. The annual amount of elements taken up is 70 kg N, 4,9 kg P, 69,3 kg K, 43 kg Ca and 6,1 kg Mg per ha. For K, Ca and Mg a large part of the nutrient uptake is due to crown leaching. The amount of N and P in the litter fall constituted the largest part of the uptake of N and P. For the elements K, Ca and Mg, crown leaching is very important in the nutrient cycling : crown leaching amounts respectively 63/, 21/ and 43/ of the annual return of these elements from the canopy to the forest floor.
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