The study of some ecological factors affecting distribution of Festuca ovina in Rangelands, Lorestan Province- County Delfan

Subject Areas : forest

amir  mirzaei mossivand ¹ (University of Mohagegh Ardabili)
Farshad  Keivan Behjou ² (Associate Professor, Faculty of Agricultural Technology and Natural Resources, University of Mohagegh Ardabili, Ardabil, Iran)
Parvin  Ramak ³ (Research Division of Natural Resources, Lorestan Agricultural and Natural Resources Research and Education Center, AREEO, Khorramabad, Iran)
Ehsan  Zandi Esfahan ⁴ (Assistant Professor, Rangeland Research Division, Research Institute of Forests and Rangelands, Tehran, Iran)

Received: 2016-05-25 Accepted : 2017-02-07 Published : 2017-02-19

Keywords: "Environmental Factors", "Cluster Analysis", "Discriminant Analysis", "Festuca ovina Boiss", "Lorestan Province",

Abstract :

The aim of present study was assessing relationship between Festuca ovina dispersion. 5 habitats in County Delfan was chosen. In each habitat, three sites were selected at each site was established three transects the length of 100 meters. Along each transect in 10-square-meter plots with a total canopy cover and density of the studied species was determined. Then at initial, mid and end of transects soil samples were extracted in 0-30cm depth (A total of 135 soil samples). Height, slope, aspect and some soil characteristics including texture, electrical conductivity, acidity, organic matter, phosphorus, potassium and nitrate was determined. Cluster analysis to classify the sites sampled, Compare groups resulting from cluster analysis of independent t test and discriminate analysis was used to determine the important parameters. The results of cluster analysis indicated that the sites were separated to two main groups (At 5%). Also the results showed that studied species have the most presence in height of 2641m, slope more than 40 percent, NorthWest and western aspect, temperature more than 10 degree, precipitation 481mm, soils with 1.97 percent organic matter and less clay also more silt. The results of discriminant analysis indicated that at first level height, precipitation, temperature and some soil parameters like sand, silt and organic matter and at second level aspect and other soil characteristics like pH and potassium are effective in the studies species dispersion. According to the results of this study can be recommended as suitable to be used for rangeland restoration

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