Document Type : Research Paper
Authors
1
Faculty of Natural Resources, University of Zabol, Zabol, Iran
2
Professor, Faculty of Natural Resources, University of Tehran, Karaj, Iran
3
Associate Professor, Faculty of Natural Resources, University of Tehran, Karaj, Iran
4
MSc. Graduate, Faculty of Natural Resources, University of Tehran, Karaj, Iran
Abstract
The aim of this research was to compare the amounts of existing mineral elements in plant aerial parts, litter and soil of
three range species (Bromus tomentellus, Psathyrostachys fragilis, Agropyron tauri) in order to investigate the litter effect
of species on soil properties of Taleghan rangeland. The measured mineral elements include carbon, nitrogen,
phosphorous and potassium. After selection of the appropriate plant species and suitable sites, random- systematic
sampling method was used to plant aerial part, litter and soil sampling. Soil data were taken of 0-30 cm depth and in
addition to above mineral elements, soil texture, EC, pH and lime percentage was measured in soils of the sites. The data
was analyzed by analysis of variance (ANOVA), Duncan’s test and t-test. Results of analysis of variance of different
elements showed that the amounts of nitrogen, carbon and C/N ratio of the species litter had significant differences, so
that A. tauri had the highest concentration of nitrogen and B. tomentellus had those of Carbon and C/N ratio. Results also
indicated that there are significant difference among the amounts of nitrogen, phosphorous and carbon in plant aerial part
of the mentioned species (P<0.01). P. fragilis had the highest amount of nitrogen and both P. fragilis and B. tomentellus
had higher amount of carbon and phosphorous than A. tauri. Soil under the species and control showed significant
differences so that the mentioned species improve soil productivity. Totally, A. tauri had the highest litter quality and
decomposition rate.
Keywords
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