J. Bio. Env. Sci.5(2), 282-288, September 2014
Planning and optimal management of rangelands is important to achieve to vegetation changes in enclosure and enclosure rangelands. In this study due to the lack of sufficient research was compared the effect of each of the four methods of rangeland management on the plant composition. The study area located in the rangelands around the Bojnourd city of Northern Khorasan province and management methods including enclosure (18 years), enclosure agricultural rangelands, key and critical rangelands. Sampling was done by 1 meter Plots and random distribution. The canopy cover divided by species and studied based on growth form and life form. Results was analysed by SPSS software, One-Way ANOVA exam, Dunkan average compare and Chi-Square exam. The results showed that plant composition in enclosure and enclosure agricultural rangelands had significant difference with critical area. Key area had significant difference with other management methods. The conopy cover in order was reduced in enclosure, enclosure agricultural rangelands, key and critical rangelands. in other words, conopy cover was increased with increasing in grazing.
Akbarzade M. 2004. Study of vegetation changes inside and outside of Roodshour exclosure. Journal of Rangeland and desert operation of Iran 12(2), 167-188.
Akbarzade M, Mirhaji T. 2006. Vegetation changes affect of rainfall in stepp rangeland of Roodshour. Journal of Rangeland and desert operation of Iran 3, 222-235.
Arzani H, Fatahi MR, Ekhtesasi MR. 1998. Qualitative and quantitative study of vegetation cover changes in poshtkoh rangeland of yazd in past decade (1985-1997). Journal of Pajouhesh & sazandegi 44, 31-35.
Asadian GH, Akbarzade M, Sadeghimanesh MR. 2008. Journal of Rangeland and desert operation of Iran 16 (3), 343-352.
Azarnivand H, Zare Chahoki MA. 2009. Rangeland ecology. University of Tehran press, 345 p.
Basiri M, Irvani M. 2008. Vegetation changes in experimental exclosure after 19 years in sentral Zagros region. Journal of rangeland 3(2), 155-170.
Berg WA, Bradford JA, Sims PL. 1997. Long-term soil nitrogen and vegetation change on sand hill rangeland. Journal of Range Management 50(5), 462-466.
Brook EW, West NE, Walker JW. 1998. Cover components on long-term seasonal sheep grazing treatment in three- tip sagebrush steppe. Journal of Range Management 51(3), 293 – 300.
Hart RG, Ashby MM, 1988. Grazing intensities, vegetation and heifer gains : 55 years on Short grass. Journal of Range Management 51, (4): 392 – 398.
Heydarian M, Naghipoure AA, Tavili H. 2009. Journal of Rangeland and desert operation of Iran 17 (2), 243-255.
Holechek JL, Stephenson T. 1983.Comparison of big sagebrush vegetation in north central New Mexico under moderately grazed and grazing excluded conditions. Journal of Range Management 36(4), 455-456.
Holechek JL, Pieper RD, Herbel CH. 2004. Range Management (Principle and Practices). 736.
Hoveizeh H, Malekpour B, Salehi H. 2001. Study of exclosure effect on rangeland condition and terend in warm semi-stepp rangeland of Khozestan. 2th national congress rangeland and rangemanagement in Iran. 16-18 january 2001, 134-140.
Khatirnameni J. 2007. Study of vegetation changes in grazing and without grazing condition in Chat rangeland. Journal of Rangeland and desert operation of Iran 14(1), 88-96.
Laycock WA. 1967. How heavy grazing and protection affect Sagebrush – Grass Ranges. Journal of Range Management 20(4), 206-213.
LeHouerou HN. 1981. An eco-climatic classification of intertropical Africa, FAO plant Production and Protection Paper ( FAO), No. 31, Rome ( Italy): 43.
Mirzaali A, Mesdaghi M, Erfanzade R. 2003. Study of exclosure effect on vegetation and surface soil in Gomishan salt rangeland. Journal of agricultural science and natural resources. 20(2), 194-201.
Moghadam MR. 2005. Rangeland and range management. University of Tehran press. 470 p.
Mosavi AM, Aghajanlo F. 2006. Study of exclosure effect on qualitative and quantitative changes in rangeland (1384-2002). Journal of forest and rangeland. 67, 605-613.
Noor M, Khan M, Nabi G. 1991. Effect of 6 years livestock exclusion on palatable range vegetation of Banda Shah Kohat. Pakistan. Journal of Forestry 41 (3), 126 – 129.
Pieper RD. 1968. Comparision of vegetation ongrazed and ungrazed Pinyon-juniper grassland sites in south centeral NewMexico. Journal of Range Management 21(1), 51-53.
Romo JT, Redmann RE. 1975. Growth of winter fat following defoliation in Northern mixed prairie of Saskatchewan. Journal of Range Management 48 (3),240 –245.
Rose AB, Plat KH. 1992. Snow tussock (Chionochloa) population response to removal of sheep and European hares, Canterbury, New Zealand, New Zealand. journal of botany 30(4), 373-382.
Vahabi M, Khajodin SJ. 1997. Study of vegetation changes, plant composition and rangeland product in exclosure condition. Journal of of agricultural science and natural resources 20(1), 59-70.
West NE. 1984. Vegetation change after 13 years of livestock grazing exclusion on sagebrush semidesert in west central Utah. Journal of Range Management. 37(3), 262-264.
Yavari A, Tavili H, Garivani GM. 2001. Study of rangeland vegetation dynamism affect of different utilization and improvemental management in northern Khorasan condition. 2th national congress rangeland and rangemanagement in Iran. 16-18 january 2001, 175-186.
Yorks TP, West NE, Capels KM. 1992. Vegetation diffrences in desert shrublands of west Utah, Spine Valley between 1933 and 1989. Journal of Range Management. 45(6), 589-577.