Cultivation of flax in spoil‐bank clay: Mycorrhizal inoculation vs. high organic amendments |
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Authors: | David Püschel Jana Rydlová Radka Sudová Milan Gryndler |
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Affiliation: | 1. Institute of Botany, Academy of Sciences of the Czech Republic, Zámek 1, 252 43 Pr?honice, Czech Republic;2. Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20 Prague, Czech Republic |
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Abstract: | A greenhouse experiment was focused on the application of arbuscular mycorrhizal fungi (AMF) in effective crop production during reclamation of coal‐mine spoil banks. The aim of the study was to find out whether mycorrhizal inoculation improves growth of flax (Linum usitatissimum L.) and whether it can compensate for high doses of expensive organic amendment. Flax was planted in original spoil‐bank gray Miocene clay amended with organic matter used for spoil‐bank reclamation (mixture of composted urban waste and lignocellulose papermill waste). This amendment was applied in four descending doses equivalent to the application of 500, 200, 100, and 0 t ha–1. The plants received either a mixed inoculum of three AMF species (Glomus mosseae, G. claroideum, and G. intraradices) or were left uninoculated. Growth of flax was significantly increased by mycorrhizal inoculation in pure clay (by 60%) as well as in clay with all amendment doses (by 119% on average). Also, the addition of organic matter increased plant growth but, interestingly, the biomass production was comparable regardless the dose of amendment. Our results suggest that similar yields are attainable with only one fifth of the usual fertilization dose, which can significantly decrease costs related to the reclamation of spoil banks. If mycorrhizal inoculation is applied together with the optimized fertilization, growth of flax planted in spoil‐bank clay can be further improved. |
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Keywords: | arbuscular mycorrhizal fungi compost lignocellulose papermill waste Linum usitatissimum reclamation |
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