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<p>Although exclosures were widely implemented to reverse land degradation processes in Tigray region, North Ethiopia, there is a lack of scientific studies on how these exclosures impact the soil erodibility factor. Therefore, this research was carried out to assess the soil erodibility factor in exclosures of varying ages so as to aid land management decisions. In the study area, exclosures aged 9, 14 and 26&#xa0;years, and a nearby open grazing area were selected for comparison. To reduce slope heterogeneity, the selected land use types were further categorized into upper, middle, and lower slope positions. From each of these slope positions, three composite soil samples were collected from the top 0–20&#xa0;cm&#xa0;soil depth of each slope position per land use, resulting in a total of 36 soil samples. Soil texture and organic carbon content were analyzed to evaluate the soil erodibility factor values. Subsequently, the differences in soil erodibility factor values were assessed using the Erosion Productivity Impact Calculator (EPIC) model. Finally, a two-way ANOVA was conducted to assess the impact of exclosures of different ages on soil erodibility. The results indicated that soil erodibility factor values varied significantly (p &lt; 0.05) across all land uses. However, there was no significant variation across slope positions (p &gt; 0.05). Accordingly, exclosures with ages of 26, 14, 9&#xa0;years, and open grazing land, showed mean soil erodibility factor values of 0.015, 0.019, 0.021, and 0.024 tone hr. MJ<sup>− 1</sup>&#xa0;mm<sup>− 1</sup>, respectively. This suggests that exclosures have enhanced soils’ resistance to water erosion, while the adjacent grazing areas are more susceptible to such erosion. It further highlights that soil erodibility is more influenced by vegetation cover and land management practices than slope positions. By quantifying exclosures’ age dependent soil properties changes, this study provides a novel insights into temporal patterns of soil erodibility under exclosures management, offering practical guidance for sustainable land management practices.</p>

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Evaluating the changes in soil erodibility factor (K) induced by exclosures of different ages, Kola Tembien, Tigray, Ethiopia

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  • 发表日期：

    2026年1月9日

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  • Haftaye Hadush,
  • Gebeyehu Taye,
  • Kidane Giday,
  • Girmay Gebresamuel

摘要

Although exclosures were widely implemented to reverse land degradation processes in Tigray region, North Ethiopia, there is a lack of scientific studies on how these exclosures impact the soil erodibility factor. Therefore, this research was carried out to assess the soil erodibility factor in exclosures of varying ages so as to aid land management decisions. In the study area, exclosures aged 9, 14 and 26 years, and a nearby open grazing area were selected for comparison. To reduce slope heterogeneity, the selected land use types were further categorized into upper, middle, and lower slope positions. From each of these slope positions, three composite soil samples were collected from the top 0–20 cm soil depth of each slope position per land use, resulting in a total of 36 soil samples. Soil texture and organic carbon content were analyzed to evaluate the soil erodibility factor values. Subsequently, the differences in soil erodibility factor values were assessed using the Erosion Productivity Impact Calculator (EPIC) model. Finally, a two-way ANOVA was conducted to assess the impact of exclosures of different ages on soil erodibility. The results indicated that soil erodibility factor values varied significantly (p < 0.05) across all land uses. However, there was no significant variation across slope positions (p > 0.05). Accordingly, exclosures with ages of 26, 14, 9 years, and open grazing land, showed mean soil erodibility factor values of 0.015, 0.019, 0.021, and 0.024 tone hr. MJ− 1 mm− 1, respectively. This suggests that exclosures have enhanced soils’ resistance to water erosion, while the adjacent grazing areas are more susceptible to such erosion. It further highlights that soil erodibility is more influenced by vegetation cover and land management practices than slope positions. By quantifying exclosures’ age dependent soil properties changes, this study provides a novel insights into temporal patterns of soil erodibility under exclosures management, offering practical guidance for sustainable land management practices.