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(Article of periodic en Français - 1983)

Document title

Effets de la fertilisation minérale sur les ectomycorhizes d'une hêtraie

Authors(s) and Affiliation(s)

BLAISE T. ; GARBAYE J. ;

Abstract

Five different morphological types of ectomycorrhizae have been counted in three treatments (control, Ca, and NPKCa) of a fertilization experiment in a mature beech forest on acid soil with moder-type humus. Nine years after the fertilization, the greatest alterations in the root systems and of the mycorrhization have been observed in the complete NPKCa treatments, which proved to be very efficient for the growth of the trees. Thin roots are all mycorrhizal but, compared with the control treatment, their total number per square meter is reduced to one half, and hairy mycorrhizae with abundant external mycelium are partly replaced by smooth ones. These results suggest that the new supply of nutrients following fertilization leads to a reduction of the density of exploration of soil by roots and mycorrhizae.

Source

Article of periodic

published at : Acta oecologica. Série Oecologia plantarum Montreuil

Editor :

Millesime : 1983, vol. 4, no2 [pp. 165-169]

Bibliographic references : 7 réf.

Language

Français

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