Iranian Biology Society Journal of Plant Research (Iranian Journal of Biology) 2383-2592 30 4 2018 02 20 Study of some ecological characteristics of Vitex agnus-castus L. in Qom province Study of some ecological characteristics of Vitex agnus-castus L. in Qom province 807 816 980 FA Elham Khoshsima Department of Biology, Faculty of Science and Agriculture, University of Payame Noor, Tehran Center East, Iran Yunes Asri 0000-0002-4566-1756 Journal Article 2015 11 22 Vitex agnus-castus species of Lamiaceae family and is native to the Mediterranean region and Central Asia. In this investigation, some ecological characteristics of this species were studied in two representer sites representing in Qom province (Iran) in random-systematic method. In these sites, density, coverage, height, stem diameter, companion species and regeneration of Vitex were measured. Cover shrubs were determined by measuring the diameter of large and small crown. Also, three soil samples were taken from the depth gathering of roots and some of their chemical and physical properties were measured. The measured characteristics of soil included texture, electrical conductivity (EC), acidity (pH), nitrogen (N), phosphorus (P), potassium (K) and organic matter (OM). The raw data were analyzed by ANOVA method in Minitab software ver.14. According to the results, plants height, show significant difference at 5% level (P<0.05). To determine the major factors affecting plant distribution, Principle component analysis (PCA) as implemented in minitab ver. 14 was used. The overall results showed that the most important factors in classification of the species of these sites, were phosphorus (P), sand and EC. Vitex agnus-castus species of Lamiaceae family and is native to the Mediterranean region and Central Asia. In this investigation, some ecological characteristics of this species were studied in two representer sites representing in Qom province (Iran) in random-systematic method. In these sites, density, coverage, height, stem diameter, companion species and regeneration of Vitex were measured. Cover shrubs were determined by measuring the diameter of large and small crown. Also, three soil samples were taken from the depth gathering of roots and some of their chemical and physical properties were measured. The measured characteristics of soil included texture, electrical conductivity (EC), acidity (pH), nitrogen (N), phosphorus (P), potassium (K) and organic matter (OM). The raw data were analyzed by ANOVA method in Minitab software ver.14. According to the results, plants height, show significant difference at 5% level (P<0.05). To determine the major factors affecting plant distribution, Principle component analysis (PCA) as implemented in minitab ver. 14 was used. The overall results showed that the most important factors in classification of the species of these sites, were phosphorus (P), sand and EC. https://plant.ijbio.ir/article_980_d79aac075930c83c2f1e369a511148fe.pdf