Effects of species diversity changes on soil organic matter particle of mountainous rangeland of West Azerbaijan
Subject Areas : forestbehnam bahrami 1 , reza erfanzadeh 2 , javad moetamedi 3
1 - MSc Student of Rangeland Management Department, Faculty of Natural Resources, Tarbiat Modares University, Iran
2 - Assistant Professor of Rangeland Management Department, Faculty of Natural Resources, Tarbiat Modares University, Iran.
3 - - Assistant Professor, Rangeland Management Department, Faculty of Natural Resources, Urmia University, Iran
Keywords: Rangeland ecosystem, Prangos uloptera, Unstable soil components, Aggregate soil, West Azerbaijan,
Abstract :
In this study, For evaluating the effect of Prangos uloptera and accompanying species on the components of soil organic matter and distribution of aggregates, mountainous rangelands of Khaneghah-Sorkh of Urmia was selected. Sampling was conducted random-systematically. Initially, two locations beside of each other were selected, and then 4 sites, which were the representative of each location, were selected for sampling. Soil samples were collected from 0-15 and 15-30cm depth and totally 32 soil samples for each location from two depths were collected. Particulate organic matter- Carbon (POM-C) and Particulate organic matter- Nitrogen (POM-N), Percentage of coarse and fine aggregates and existing carbon of them were examined and analyzed. Results of variance analysis show that except the percentage of coarse aggregate all other investigated factors were increased by the increase of accompanied species diversity with each base of Prangos uloptera in the second location. Particulate organic carbon and nitrogen, carbon associated with coarse and fine aggregates percentage is significantly influenced by the high diversity of the accompanied plant species with the Prangos uloptera in the second location. Results of this study showed the rapid effects of management changes on the particulate organic matter and also proved the variability of particulate organic matter in the soil under the change of management practices on vegetation. Moreover, the increase of particulate organic matter can be unstable, thus management of vegetation and species diversity of rangeland ecosystems must be conserved for long time, till we have seen positive increase in soil organic carbon
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