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Contemporary Problems of Ecology

2013 year, number 5

About Comparability of Litter Morphogenetic Peculiarities and Litter Humus State in the Bog Birch Forest

T. T. EFREMOVA, A. F. AVROVA, S. P. EFREMOV
V. N. Sukachev Institute of Forest, SB RAS, 660036, Krasnoyarsk, Akademgorodok, 50, building 28
Keywords: bog birch forest, forest litter, morphogenetic types, organic matter, humification

Abstract

The six litter types, such as heavily decomposed, middle decomposed, rhizome-like (coarse decomposed), turfy, peaty and turf, were determined on the gradient of large grass-dead soil cover-sphagnum in the bog birch forest. Specificity of their biochemical transformation depends on the amount of gumic acid accumulation, mainly of the first fraction (GA-1), at the background of relatively uniform rate of the formation of fulvic acids. The intensity of GA-1 formation is closely positively connected with the biological activity of substratum, judging from the C/N ratio. However, unclear distinctions between these indices of forestry-morphological litter types limit their diagnostic reliability. Grouped biochemical litter categories – mild (heavilyand middle decomposed), transitional (rhizome-like, turfy, peaty) and coarse (mossy) are significantly discriminated by the C/N ratio – 20, 30, 40, as well as by the content of GA-1 – 14, 10, 6 %, respectively.