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Contemporary Problems of Ecology

2004 year, number 1

Specific Features of the Changes in Daily Photosynthetic Productivity of Conifers. I. Siberian Larch

G. G. SUVOROVA, A. S. SHCHERBATYUK, L. S. YAN’KOVA

Abstract

The dependencies of daily photosynthetic productivity of the Siberian larch on total daily illumination, air temperature averaged over the photosynthesis period, soil temperature at the depth of 5 cm, and amount of moisture accumulated in the upper half-a-meter layer of soil are analyzed. Regular variations of this parameter are revealed. For larch under the conditions of optimal soil moistening, broad ranges of optimal air temperature and illumination are typical. The dependence on temperature is clearly expressed during cold seasons. The importance of these features in vital functions of plants is discussed.