Abstract
Effects of liming and B fertilization on Norway spruce [Picea abies (L.) Karst.] mycorrhizas were studied in factorial field experiments. The lime was applied twice, about 30 years and 12 years before sampling (2000 and 4000 kg ha-1 dolomite). B was applied at the rate of 1.5 kg B ha-1 two years before sampling.
Boron fertilization doubled the number of root tips in the top 10 mm of the humus layer. The proportion of dead short root tips was increased from 10 % in control plots to 29 % in the limed plots. Numbers of dead root tips were increased when both lime and B were applied. The % of mycorrhizas with external mycelium was slightly increased and the % of Piloderma croceum Erikss. and Hjortst. was decreased by lime. In conclusion, adverse effects of lime on mycorrhizas were found, which were ameliorated by B fertilization, but lime-induced B deficiency alone was not the only reason for the effects of lime on root mortality.
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Lehto, T. Effects of liming and boron fertilization on mycorrhizas of Picea abies . Plant Soil 163, 65–68 (1994). https://doi.org/10.1007/BF00033941
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DOI: https://doi.org/10.1007/BF00033941