KARELIAN BIRCH RESPONSIVENESS TO NITROGEN TREATMENT Cover Image

РЕАКЦИЯ КАРЕЛЬСКОЙ БЕРЕЗЫ НА ВНЕСЕНИЕ АЗОТНЫХ УДОБРЕНИЙ
KARELIAN BIRCH RESPONSIVENESS TO NITROGEN TREATMENT

Author(s): Elena V. Novichonok, Vladislava B. Pridacha, Nadezdha N. Nikolaeva, Diana S. Ivanova, Tatiana A. Sazonova
Subject(s): Physical Geopgraphy, Environmental interactions
Published by: Петрозаводский государственный университет
Keywords: Karelian birch; nitrogen treatment; atmospheric drought; leaf CO2/H2O-exchange parameters; leaf anatomical structure; leaf morphology;

Summary/Abstract: The hypothesis that the formation of the figured pattern in Karelian birch wood is related to excess sucrose in the conducting phloem and cambial zone of the trunk highlights the significance of soil fertility in this process. The present studies were conducted on Karelian birch plants grown under two different regimes of nitrogen treatment (0 and 40 g N tree-1). The fertilization resulted in an increase in leaf area and the above ground to below ground biomass ratio. The development of water stress, probably due to the combined effect of nitrogen treatment and atmospheric drought, is prevented through a decrease in stomatal conductance and transpiration rate. At the same time, there is a decrease in the rate of photosynthesis, which leads to a decrease in the amount of produced sucrose. In this regard, we assume that the nitrogen treatment of the soil will have a negative impact on figured wood formation in Karelian birch.

  • Issue Year: 2018
  • Issue No: 8 (177)
  • Page Range: 48-54
  • Page Count: 7
  • Language: Russian
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