تعداد نشریات | 418 |
تعداد شمارهها | 10,002 |
تعداد مقالات | 83,581 |
تعداد مشاهده مقاله | 78,083,020 |
تعداد دریافت فایل اصل مقاله | 55,020,106 |
Study on the Environmental Factors Contributing to Distribution of Thymus kotschyanus in Taleghan Basin, Iran | ||
Journal of Rangeland Science | ||
مقاله 9، دوره 4، شماره 1، فروردین 2014، صفحه 82-90 اصل مقاله (1.99 M) | ||
نوع مقاله: Research and Full Length Article | ||
نویسندگان | ||
Leila Darvishi1؛ Mohammad Ali Zare Chahouki* 2؛ Mohammad Jafari2؛ Hussein Azarnivand2؛ Majid Yousefi Valikchali3 | ||
1Department of Rangeland Management, University of Tehran | ||
2Department of Rehabilitation of Arid and Mountainous Regions, Faculty of Natural Resources, University of Tehran | ||
3Faculty of Forest Science, Gorgan University of Agricultural Sciences & Natural Resources | ||
چکیده | ||
Growth and productivity of plants are mainly affected by various environmental factors in different ecosystems and natural habitat in the world. This research aims to study the existing relationships between the phytosociology characteristics of Thymus kotschyanus and environmental factors in order to find the most important factors governing development of the species in middle Taleghan rangelands, Iran. Subsequent to indicating the study region, the required flora and environmental data were collected by field survey. Plot size and sample size were determined by minimum area and vegetation procedure methods, using 40 plots along four 100 m transects. The characteristics including floristic list, percentage of canopy cover, number of plants as well as height, the largest and smallest diameter, and freshness of T. kotschyanus were recorded. Likewise, bare soil percentage, litter percentage, and stone and gravel percentage of topsoil were recorded in each plot. Moreover, in order to study the soil features, eight soil profiles were taken in each site up to 30 cm depth at the beginning and end of each transect. Classification of vegetation cover was performed by TWINSPAN analysis while factors influencing the change in vegetation characteristics of T. kotschyanus were determined by PCA analysis. Results demonstrated that factors involving slope, altitude, organic matter, lime content, nitrogen content and soil texture show the highest impact on vegetation characteristics. Overall, variables including elevation ranging between 2300-2500 m, slope in the range of 20% - 40%, and fertile sandy loam textured soils in presence of nitrogen and high organic matter content as well as low lime content provide the most suitable condition to develop a high production T. kotschyanus. | ||
کلیدواژهها | ||
Taleghan rangelands؛ Thymus kotschyanus؛ TWINSPAN؛ PCA | ||
مراجع | ||
Akbarzadeh, M., 2003. Medicinal plants of the family Labiatae in the Vaz Mazandaran region. Iranian Jour. Medicinal and Aromatic Plants., 19(1): 37-45. (In Persian). Boira, H. and Blanquer, A., 1998. Environmentalfactors affecting chemical variability of essential oils in Thymus piperella L. Biochemical Systematics and Ecology., 26(8): 811-822. Corticchiato, M., Tomi, F., Bernardini, A. F., Casanova, J., 1998. Composition attnd infraspecific variability of essential oil from Thymus herba barona Lois Biochem. Syst. Ecol., 26: 915-932. Davies, K. W., 2007. Environmental and vegetation relationships of the Artemisia tridentata spp. wyomingensis alliance. Jour. Arid Environments., 70: 478-494. Escudero, A., Iriondo, J. M., Olano, J. M., Rubio A., Somolinos, R. C., 2000. Factor affecting establishment of a Gypsophyte, the case of Lepidium subulatum (Brassicaceae). Am. Jour. Bot., 87: 861-871. Habibi, H., Mazaheri, D., Majnon Hossini, N., Chaiechi, M., Fakhretabatabaie, M., 2006. The height of the essential oils and medicinal compounds Thymus kotschyanus Boiss. (Case Study: Taleghan rangelands). Jour. Research and Development, 19(8): 2-10. (In Persian). Hasani, J., 2004. Identification and ecology of two species of aromatic plants Ziziphora sp. and Thymus sp. in Kurdistan. Iranian Jour. Medicinal and Aromatic Plants, 20(1): 1-17. (In Persian). Hill, M. and Hill, O., 1979. TWINSPAN - A FORTRAN program for arranging multivariate data in an ordered two-way table by classification of the individuals and attributes. Cornell University, Ithaca, New York. Jamshidi, A., Aminzadeh, M., Azarnivand, H., Abedi, M., 2006. High impact on the quantity and quality of plant oils T. kotschyanus (Case Study: Tar Lake). Iranian Jour. Medicinal and Aromatic Plants, 18(5): 17-22. (In Persian). Kent, M. and Coker, P., 1992. Vegetation description and analysis: a practical approach. John Wiley and Sons. Larti, M. and Ghasempour, S., 2009. Identifying and assessing ecological Thymus species to domestication and cultivation in West Azerbaijan. Booklet published by Agriculture and Natural Resources Research Center of West Azerbaijan, Iran. 6 pp. (In Persian). Mirdavoodi, H. and Babakhanloo, P., 2007. Identification of medicinal plants of Markazi province. Iranian Jour. Medicinal and Aromatic Plants, 23(4): 544-559. (In Persian). Mohtashamnia, S., Zahedi Amiri, Gh., Arzani, H. 2007. Vegatation ordination of steppie Rangelands in relation to the edaphical and physiographical factors. Agricultural Sciences and Natural Resources Jour., 14(6): 111-123. (In Persian). Stahl-biskup, E., 1991. The chemical composition of Thymus sp. oil. J. Essent. Oil. Res., 3: 61-82. Zare Chahouki, M. A., 2006. Modelling the spatial distribution of plant species in arid and semi-arid rangelands. Ph.D. Thesis in Range Management, Faculty of Natural Resources, University of Tehran, Iran.180 pp. (In Persian). Zargari, A., 1990. Medicinal Plants (Volume IV). Printing and Publishing Institute of University of Tehran., 923 pp. Tehran, Iran. (In Persian). | ||
آمار تعداد مشاهده مقاله: 6,919 تعداد دریافت فایل اصل مقاله: 5,053 |