Fertilisation of Quercus seedlings inoculated with Tuber melanosporum: effects on growth and mycorrhization of two host species and two inoculation methods
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Date
2017
Authors
GarcĂa Barreda, SergiMolina Grau, Sara
Reyna, Santiago
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Abstract
Modern truffle cultivation is based on use of inoculated seedlings, which
should exhibit highly colonised roots as well as a vegetative quality enhancing
field plant performance. However, poor shoot and fine root growth has been a
frequent issue in inoculated Quercus seedlings production. Fertilisation is a
common solution in forest nurseries, but high fertilisation levels have been
found to inhibit the formation of ectomycorrhizas of many fungal species. The
influence of slow-release fertilisation (52 mg N, 26 mg P and 36 mg K per
seedling) on growth and ectomycorrhizal status of Tuber melanosporum-inoculated
seedlings was evaluated. Host species Quercus ilex and Quercus faginea
and inoculation methods involving root-dipping and root-powdering were
tested. Fertilisation increased weight of both host species without significant
detrimental effects on ectomycorrhizal colonisation, showing that it can be
effectively used in inoculated seedlings production. Both host species showed
similar response to fertilisation. The inoculation method affected seedling
weight and ectomycorrhizal status, suggesting that some inoculant carriers are
able to damage Quercus development and T. melanosporum colonisation. The
study provided an important basis for fine-tuning the use of fertilisers in truffle-
inoculated seedling production.
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Bibliographic citation
iForest - Biogeosciences and Forestry, 10(1), p. 267-272
AGROVOC subjects
QuercusTuber melanosporum
Mycorrhizae
InoculaciĂłn