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Research Journal of Biological Sciences
Year: 2010  |  Volume: 5  |  Issue: 9  |  Page No.: 628 - 631

Under-Ground Biomass Characteristic of Perennial Species (Onosma trachtricum) in Northwest Iran (Till Area of Shabestar)

Hamideh Shadkami-Til and Ghassem Habibi Bibalani    

Abstract: Onosma trachtricum (Boiss.) is an important perennial native grass widespread in the range areas of the arid and semi-arid Phytogeographical region in Northwest Iran. Previous studies have shown great variability in forage biomass production per plant among different varieties. Research area is of rangeland of Til village from Shabestar district with distance is 25 km from it. This area is semi arid area and this land covered with natural range land grasses. Root and shoot in these species were sampled in one stage from late March late to late August. Roots of plants stable soils on slope and provide resistance against the forces that improve slope instability. We studied, Onosma trachtricum to determine, its characteristics. Data were collected with random sampling in this area with 1 m2 in 64 quadrate plots. Mean, max and min root biomass of this plant is 1.14, 13.05, 5.22 g m-2, respectively.

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