Investigation of fine root and mycorrhizal development of Norway spruce (Picea abies (L.) Karst.) in the upper soil layers of the open-top chambers at Edelmannshof

1997

S. 21-47

7 Tab., 11 Abb., 18 Lit. Ang.

Unselbständiges Werk

200104667

Fine root density and mycorrhizal development of Norway spruce (Picea abies (L.) Karts.) were investigated after one sampling date in the OTC-experimental plots Edelmannshof. No disturbance of development by stress from soil or fumigation treatments could be found. Surprisingly, the mycorrhizas of two trees fumigated by ambient air revealed higher FDA-hydrolysing activity than the mycorrhizas of the four trees fumigated by filtered air. This finding correlates to the higher leaching rate in the unfiltered air and may have compensated the loss by higher uptake rate of cations. This may explian why no deficiency of nutrients was found in the ambient air chambers. The probing date in early spring, however, may alos have influenced the actual activity of the mycorrhizas of the different trees.