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Lesnoy Zhurnal

The Effect of Partial Cutting on Tender Roots and Mycorrhiza of Norway Spruce

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A.Yu. Karpechko

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UDС

630*221.04:630*164.3:631.466.12

DOI:

10.17238/issn0536-1036.2018.2.23

Abstract

Tree root systems often are affected by the forestry machinery movement under the forest canopy. At the same time, thinning has a positive effect in decreasing competition between remaining trees (both for their aboveground and underground parts); the soil moisture changes and the light regime improves. All forest-forming species have ectomycorrhizae. Mycorrhizas are especially useful in the taiga zone where relatively poor soils with the slow mineralization process of organic substances predominate, since plant roots receive more nutrition elements from mineral and organic compounds. The goal of research is to study the reaction of roots and mycorrhizas left after felling (mechanized thinning) to the changed conditions of growth. The root systems of the spruce element of the stand were studied in permanent sample plots in the Republic of Karelia (middle taiga subzone). Their condition was estimated in 5 and 14 years after cutting. We used the method of monoliths selected in technological corridors and swaths throughout the area of the site. Simple and ferny forms of spruce mycorrhiza were observed. The root mass was reduced significantly after felling in the technological corridor and could be restored in at least 14 years. Mycorrhiza formation occurred quickly enough. 5 years after felling, the mycorrhiza density on the roots preserved in the technological corridors reached at least 54 % of the background values in the swaths. In some cases, we observed an active restoration of mycorrhiza; their density in the technological corridor was higher than in the swath. Reduction of root competition, increased luminous flux reaching the soil surface in the zone of the technological corridor, are positive factors in the development of tender roots and mycorrhiza. The results of the study can be used to assess the environmental consequences of partial cutting, which is a remarkable wood sourcing.

Authors

A.Yu. Karpechko, Candidate of Agricultural Sciences, Research Officer

Affiliation

Forestry Research Institute of Karelian Research Centre of the Russian Academy of Sciences, ul. Pushkinskaya, 11, Petrozavodsk, 185910, Russian Federation; e-mail: yuvkarp@onego.ru

Keywords

root, mycorrhiza, partial cutting, technological corridor, swath

For citation

The Effect of Partial Cutting on Tender Roots and Mycor-rhiza of Norway Spruce. Lesnoy zhurnal [Forestry journal], 2018, no. 2, pp. 23–32. DOI: 10.17238/issn0536-1036.2018.2.23

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Received on December 15, 2017


The Effect of Partial Cutting on Tender Roots and Mycorrhiza of Norway Spruce

 

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