The study was conducted in Taftan rangeland in Sistan and Baluchestan, Iran, to study the effects of grazing exclusion on reclamation of vegetation cover and soil properties. After a comprehensive assessment of the vegetation types, plant sampling was carried out in sampling stands (50 × 50 m). In each stand, vegetation properties were measured using simple transect lines (50 m) method within quadrats (5 × 5 m), with a systematically randomized method. Soil sampling (75 samples) was performed along transects from the surface layer (0–30 cm). Results showed that livestock exclusion significantly affected community characteristics. The species richness (14.32), diversity (2.97), and plant cover (65.14%) showed their maximum level in the 15-year exclusion. The soil nutrient content increased during exclusion. Organic carbon (4.20%), total nitrogen (1.12%), available potassium (393.33 mg kg−1), and available phosphorus content (17.13 mg kg−1) attained significantly greater values under the long-term e...

Effects of rangeland exclusion on plant cover and soil properties in a steppe rangeland of Southeastern Iran

Studies on vegetation changes of rangelands under grazed and non-grazed conditions are of great importance in the range management planning programs. To determine the change process of vegetation, this study was performed in Inche Shorezar site of Golestan province for nine years (1997-2005). The vegetation parameters were measured every year in several fixed plots inside and adjacent of exclosures. The canopy cover of each species was estimated in each plot. Forage production was randomly measured on one meter square plots in each year using the clipping and weighing method. Correlations between canopy cover of species and growth forms with the rainfall of different months and periods were calculated using SPSS software. Results showed that total canopy cover in 2005 was significantly higher than 1997 both inside and adjacent of exclosures which has been mainly related to increased annual plant cover but the perennial canopy cover was decreased in these years. Perennial species of (class I) did not grow inside the fixed plots. Cover of increasers (class II) species was reduced from the first year to the final one for both inside and adjacent of exclosures. However, the cover of (class III) species in the final year was not significantly increased than that for the first year. Forage production generally was higher inside than adjacent of exclosures. Litter increased during the study period for both inside and adjacent. Litter was significantly higher inside of exclosures than adjacent in 2005. Although the plant canopy cover was affected by rainfall but correlation coefficient was statistically significant only for total, annual and some perennial canopy cover species. Although total and annual cover was high inside and adjacent of exclosures in 2005, the cover of perennials was decreased. By the reduction of palatable species, unpalatable species were increased inside and adjacent. Although by increasing the plant cover, the range condition was relatively improved, this improvement was achieved by the increase in the annuals instead of perennials. It was concluded that the exclosure cannot be used as a range improvement method to improve these rangelands' conditions. For the rehabilitation of these areas, human interference is necessary.

http://www.rangeland.ir/article_512817_f3c5a31ce8563c8728d062f7f3f23b61.pdf

Studying the Vegetation Changes of Natural Rangelands in Inche Shorezar of Agh Ghala, North Golestan Province, Iran

ششوپ تارییغت هعلاطم یهایگ رد يارچ مدع و ارچ طيارش ماد  یعترم ياههاگشيور رد ،  رد نآ شقن هب هجوت اب  همانرب يزير ياه عتارم يایحا ،  تیمها هژيو يا  دراد . هقطنم رد یعیبط عتارم یهایگ ششوپ تارییغت دنور رد قرق ریثات یپتسا همین ناشیمگ رد ناتسلگ ناتسا لاس زا 1931  ات 1931  .تفرگ رارق هعلاطم دروم  نيدب هک تروص  هلاس ره ياهرتماراپ  رد قرق جراخ و لخاد رد یهایگ ششوپ  تارداوک تباث ياه  هزادنا دش يریگ . ،سپس شور هب ناهایگدیلوت و عطق  زا هدافتسا اب نيزوت  وک ا تارد ياه یفداصت هزادنا يریگ .دش  هداد اه  نومزآ اب  T مرن رد رازفا MiniTab 15  .دندش هسياقم یجات ششوپ لک داد ناشن جياتن  و یمئاد نایمدنگ لخاد رد هب تبسن قرق جراخ  ب ه ینعم روط راد هتوب یلو دنتفاي شيازفا يا سارگ و ناگرب نهپ ،اه دنتفاي شهاک هلاسكي ياه . لخاد رد یمئاد نایمدنگ شيازفا ق قر ب ه یمئاد یمدنگ شيازفا تلع Puccinella distans  دوب ه ،  هنوگ زا هک سلاک ياه  I  .تسا هتوب شهاک يا رد اه و لخاد ب قرق جراخ ه هتوب هنوگ شهاک تلع يا Halocnemum strobilaceum  هنوگ زا هک هدوب اه سلاک ي  III  .تسا  هنوگ ياه یمئاد Artemisia sieberi  و Frankenia hirsuta  دنتشادن دوجو قرق ادبم لاس رد هک ،  لاس رد .دندش رقتسم دعب ياه نازیم داد ناشن دیلوت هسياقم جياتن  یمئاد نایمدنگ و لک دیلوت شيازفا جراخ هب تبسن قرق لخاد رد تشاد تسا ه .  نینچمه لخاد عترم تیعضو قرق بوخ هب طسوتم زا دوبهب تفاي .

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Akbarzadeh Morteza

Papers

The effects of the exclosure on the improvement of the range lands in hamedan province