Specific absorption-translocation of nutrients in relation to the morphology of root surface tissues, in the case of beech (Fagus sylvatica) and Norway spruce (Picea abies). Measurements of absorption-translocation
1993
Praag, H.J. van (Faculte des Sciences Agronomiques, Gembloux (Belgium). Centre de Recherche et de Promotion Forestieres) | Sougnez-Remi, S. | Weissen, F.
The specific absorption-translocation technique of Clarkson and Sanderson was applied using root segments of whole seedlings of Fagus sylvatica L. and Picea abies Karst., from natural regeneration. The amounts of 45Ca and 32PO4H2 translocated form the absorbing segments to the various organs were measured. Notwithstanding the variability of the results, a distribution curve of absorption-translocation fluxes, depending on the mean distance of the absorbing segments to the root apex, was observed. In any modellisation of root absorption of forest trees, total absorption flux assigned to whole rootlets may be divided and redistributed according to segment distance to the tip, in order to give a better estimate of the theoretical parameters that characterize nutrient uptake.
显示更多 [+] 显示较少 [-]