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Paper Information

Journal:   IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH   2016 , Volume 23 , Number 2 #a00466; Page(s) 311 To 321.

Impacts of grazing management on some soil physical and chemical characteristics in semi-steppe rangelands

* Department of Range and Watershed Management, Gorgan University of Agricultural Sciences and Natural Resources, Iran
This research was performed in semi-steppe rangelands of Fars province in the Cheshmeh Anjir region, in 2013. Soil sampling was performed in a random-systematic manner. In each area, three transects of 50 m were established randomly with a proper distance in an area of about two hectares, and on each transect, two soil profiles were dug. The soil samples were collected from two depths of 0-25 and 25-60 cm. The experiment was laid out in a split-plot in a randomized complete block design with three replications. The study area at three levels (key, reference and critical) and the sampling depth at two levels (0-25 and 25-60 cm) were considered as main factor and sub-factor, respectively. The statistical analysis was performed using SPSS software. Mean comparison was performed by Duncan's test. The results of this study showed a significant difference (p<0. 01) among the grazing management regions in terms of soil physical and chemical properties including pH, organic carbon, sand, clay, and total nitrogen, so that pH and sand percentage increased and clay percentage decreased with increasing of grazing intensity. Meanwhile, with increasing of grazing intensity, organic carbon and total nitrogen decreased in the key area and then increased equivalent to that of reference area. Significant differences (P<0. 01) were found between soil depths for the soil pH, and the percentage of sand, silt, phosphorus and total nitrogen. In addition, the percentage of organic carbon and total nitrogen varied significantly (P<0. 01) among transects.
Keyword(s): Grazing management,soil characteristics,grazing intensity,Cheshme-Anjir,Fars Province
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