Journal of Rangeland

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The effect of different levels of protection as a management tool on the organic carbon dynamics is important. To examine the case areas with three levels of protection, including hunting prohibited region, national park and protected areas were selected and studied. Soil samples were taken from depths of 0-10, 10-30, and 30-100 cm in a randomized-systematic method having three replications. Soil fractions were screened using meshes sized 18, 35, 60 and 270. Soils of each depth were put into 5 size fractions and their carbon were measured. The results showed that the amount of carbon in different depths of soil in the national park is the same with no significant differences. In general, the area is not used by any means and amount of the carbon for all measured soil depth, therefor, is not significantly different. For the protected areas and hunting prohibited region amount of the carbon is varied for different depths. In the protected area for the average grazing intensity, wildlife and nomadic livestock, root growth and organic matter decomposition in the lower layers are low and the highest levels of carbon only in the surface layers could be observed. In the hunting prohibited region, grazing intensity reduces the entry of plant materials and the high loss of carbon dioxide occurs, result is the low percentage of soil carbon. For all studied areas, the soil carbon content decreases when particle size is increased. The least amount of carbon therefore, is related to F1 and F2 components and the most to F4 and F5 size fractions.

Keywords: Carbon dynamics, Salook, hunting prohibited, national park, protected area, carbon content

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