2014,    N 2 (15)    

FORESTRY

Makarikova R., Naumova N., Kuznetsova G.

Intra- and interspecies variability of pines: relationship with soil chemical properties in the long-term provenance experiment in the Western Sayans

In the long-term field provenance experiment in the south of Krasnoyarsk region (Russia) the interspecies heterogeneity of pines (Pinus sibirica Du Tour и Pinus koraeansis Sieboldd et Zucc.) was shown to influence some soil chemical properties. The plots under the Siberian pine, as compared to the ones under the Korean pine, were found to have higher (P <= 0,05) contents of soil total nitrogen (0,124% vs. 0,105%), nitrites (0,21 vs. 0,14 mg N•kg-1 soil), and pH (6,21 vs. 6,05); as well as (P <= 0,10) soil organic carbon (3,84% vs. 3,53%), nitrates (2,6 vs. 1,4 mg N•kg-1 soil) and labile phosphorus (3,0 vs. 2,5 mg•kg-1 soil). The pines’ intraspecies heterogeneity was shown to have practically no influence on soil chemical properties. Overall the variability of soil chemical properties to a much greater extent was determined by the immediate influence of pine roots, i.e. rhizosphere effect, than by inter- or intraspecies variability of the studied pines.

Keywords: PINUS SIBIRICA DU TOUR, PINUS KORAEANSIS SIEBOLDD ET ZUCC., CLIMATYPES, GREY SOIL, SOIL CHEMICAL PROPERTIES, RHIZOSPHERE, LONG-TERM PROVENANCE EXPERIMENT, THE WESTERN SAYANES

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