The Impact of Vertical Belts and Plant Vegetation Period on the Biomass Accumulation in the Rangelands

Abstract

The article considers the peculiarities of biomass accumulation and its fluctuation characteristics throughout the plants vegetation period in the rangelands of the three zones on the south-western slopes of Mount Aragats.
The highest indices for the above - and below-ground masses have been recorded in the meadow-steppe and subalpine belts, while among the vegetative groups the leguminous plants have been distinguished by the least specific weight. Some regularities related to the formation of above - and below-ground mass and to the changes of plants root system have been disclosed.
It is recommended to take measures promoting the efficiency increase in the rangelands and enrichment of plant varieties.