CENTRE ON THE PROBLEMS OF ECOLOGY AND PRODUCTIVITY OF FORESTS

RUSSIAN ACADEMY OF SCIENCES

A.B. Belyaev, D.I. Shcheglov Soil-climatic factors of oak growth and productivity in its introduction // Forest Science (Lesovedenie). 2012. No 1. С.14-21.

The soil cover, taxation and climatic characteristics in the areas of primary oak (Quercus borealis Mich.) introduction were studied in European Russia and adjacent states using the same program and methods accepted for biogeocenological investigations. Methods of statistic and information analyses were used for processing the field and laboratory materials. Each of the climatic and soil indices (factors) was assessed by the coefficient characterizing the intensity of information transmission to the phenomenon studied that is the mean increment of reserves in pure stands with a stocking of 1.0. The best growth of Quercus borealis is observed on fresh-moist acid (pH 4.0-4.5) loamy soils with well-developed humus horizon A + AB(B) (>75 cm). The bulk density of the humus horizon (root-dwelling layer) is <1.0 g cm-3, porosity >50%, and the mean humus content >1.0%. The highest productivity of oak was found at precipitation 300-500 mm for growing period, hydrothermal coefficient >1.3, relative air humidity > 73%, sum of active (>10°C) temperatures > 2475°C, duration of growing period > 160 days, and absolute minimum temperature not lower than -35°C.

Introduction, north oak (Quercus borealis, Q. rubra), statistical processing, information analysis, coefficient characterizing the intensity of information transmission (CCIIT), site index, factor ranges, leaf diagnostics..

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