Effects of Liming and Ash Application on Below Ground Ectomycorrhizal Community Structure in Two Norway Spruce Forests

Water, Air and Soil Pollution: Focus - 2003
Andrew F. S. Taylor1, Roger D. Finlay1
1Department of Forest Mycology and Pathology, SLU, Uppsala, Sweden (author for correspondence

Tóm tắt

The effect of lime and ash additions upon the below ground ectomycorrhizal communities was studied at two spruce forest sites, Horröd and Hasslöv, in Southern Sweden. At Hasslöv, fifteen years after the addition of 8.75 ton ha-1 of dolomite, the species richness of the mycorrhizal community was unchanged. However, the liming resulted in an almost total replacement of species normally found under the site conditions, with only three morphotypes from a total of 24 distinguished being common to both the control and limed plots. At Horröd, four years after the application of 3.25 ton ha-1 crushed lime, there was a significant reduction in the number of species recorded. This was not a result of a reduction in root tips sampled, since there was no significant treatment effect upon root tip abundance. Instead, it appeared that the less common species present in the control plots had been lost following liming. At the same site, the addition of 4.28 ton ha-1 of wood ash had little effect upon the mycorrhizal community as a whole, with only small changes recorded in the abundance of a small number of species. This study highlights the urgent need for additional data on the temporal and load response of ectomycorrhizal fungi to the addition of lime. This information is vital in view of the proposed widespread use of lime as a counter measure to soil acidification.

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Tài liệu tham khảo

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Water, Air and Soil Pollution: Focus

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