Grazing exclosure (GE) is used to improve rangelands in the dry area of the world, so it is important to investigate its effects on soil physicochemical and erodibility properties. This study was conducted to evaluate the effect of long-term GE on the physicochemical and erodibility properties of soil and vegetation as compared with open grazing (OG) areas in Bozdaghi region of North Khorasan province, Iran. Soil and vegetation data were sampled from two sites in the grazing exclosure and the open grazing in early autumn in a randomized complete block design with three replications. Therefore, in each area (GE and OG), three transects of 500-m length and 200-m intervals) were set up. Along each transect, five soil samples were taken at the depths of 0–15 and 15–30 cm in a random-systematic method (15 soil samples in each area) and transferred to the laboratory. In the laboratory, some soil physicochemical properties such as saturation percentage, soil texture (clay, silt, and sand), bulk density, porosity, percentage of soil organic matter (SOM), total nitrogen (TN), exchangeable sodium, potassium, pH, and electrical conductivity (EC) were measured and Soil Erodibility Index (SEI) was calculated by using the modified clay ratio relation. After installing the transects (with a length of 50 m) in three blocks in each area, the parameters of species composition and canopy cover were investigated by the linear-contact method. Data analysis was performed by using an independent t test on Statistical Package for Social Sciences (SPSS) v. 23 software. The results indicate that the application of GE in the Bozdaghi area has a significant positive effect on soil physicochemical properties (P < 0.05). Also, the application of GE has increased the amount of SOM and TN in the surface layer of the soil by about twice as much as the OG pastures. Due to these changes, during 20 years in the GE area, the effects of GE can be positively assessed. According to the obtained results, especially the positive changes in vegetation and the soil physicochemical and erodibility properties, it is recommended to execute the GE plan in the study area.

放牧的放牧（GE）用于改善世界干旱地区的牧场，因此研究其对土壤理化和侵蚀性的影响非常重要。与伊朗北部霍拉桑省的博兹达吉地区的开放放牧（OG）地区相比，长期研究GE对土壤和植被的物理化学和可侵蚀性的影响进行了评估。土壤和植被数据是从放牧地点和初秋的开放放牧两个地点取样的，采用随机完整区组设计，重复三次。因此，在每个区域（GE和OG）中，设置了三个长度为500-m，间隔为200-m的样带。沿着每个样带，采用随机系统方法在0-15和15-30 cm的深度处采集了五个土壤样品（每个区域15个土壤样品），并转移到实验室。在实验室中，一些土壤理化特性如饱和度百分比，土壤质地（粘土，淤泥和沙子），堆积密度，孔隙率，土壤有机质百分比（SOM），总氮（TN），可交换的钠，钾，pH ，然后测量电导率（EC），并使用改进的粘土比率关系计算土壤可蚀性指数（SEI）。在每个区域的三个区块中安装了长度为50 m的样条后，通过线性接触方法研究了物种组成和冠层覆盖参数。数据分析是通过使用独立的 一些土壤理化特性，例如饱和度百分比，土壤质地（粘土，淤泥和沙子），堆积密度，孔隙率，土壤有机质百分比（SOM），总氮（TN），可交换的钠，钾，pH和电导率测定EC（EC），并使用改良的粘土比率关系计算土壤可蚀性指数（SEI）。在每个区域的三个街区中安装了长度为50 m的样条后，通过线性接触方法研究了物种组成和冠层覆盖参数。数据分析是通过使用独立的 一些土壤理化特性，例如饱和度百分比，土壤质地（粘土，淤泥和沙子），堆积密度，孔隙率，土壤有机质百分比（SOM），总氮（TN），可交换的钠，钾，pH和电导率测定EC（EC），并使用改良的粘土比率关系计算土壤可蚀性指数（SEI）。在每个区域的三个区块中安装了长度为50 m的样条后，通过线性接触方法研究了物种组成和冠层覆盖参数。数据分析是通过使用独立的 用改进的粘土比率关系测量了电导率（EC），并计算了土壤可蚀性指数（SEI）。在每个区域的三个区块中安装了长度为50 m的样条后，通过线性接触方法研究了物种组成和冠层覆盖参数。数据分析是通过使用独立的 使用改良的粘土比率关系测量了电导率（EC），并计算了土壤可蚀性指数（SEI）。在每个区域的三个区块中安装了长度为50 m的样条后，通过线性接触方法研究了物种组成和冠层覆盖参数。数据分析是通过使用独立的t在社会科学统计软件包（SPSS）v。23软件上进行测试。结果表明，GE在博兹达吉地区的应用对土壤理化性质具有显着的正效应（P <0.05）。同样，GE的应用使土壤表层的SOM和TN含量增加了OG牧场的两倍。由于这些变化，在GE地区20年来，可以肯定地评估GE的影响。根据获得的结果，尤其是植被的积极变化以及土壤理化和侵蚀性，建议在研究区域执行GE计划。