Effects of the construction of Yazd-Eghlid railway on vegetation and soil of shrublands in Kalmand-Bahadoran Protected Area (Yazd Province)

Document Type : Original Article

Authors

1 Department of Environment, Faculty of Natural Resources and Desert Studies, Yazd University, Yazd, Iran

2 Researcher, Forest and Rangeland Research Department, Agricultural Research and Training Center, Yazd Province, Yazd, Iran

Abstract

Introduction: Railway construction is one of the important activities in the development of any country. Railway construction operations can have an impact on the environment around the railway. This study investigated the effects of Yazd-Eghlid railway construction on some vegetation and soil characteristics of artemisia and camel grass species located in Kalmand-Bahadoran Protected Area.
Material and methods: In order to evaluate the vegetation and soil variables in the studied types, random-systematic sampling method was used. Random-systematic sampling method is used; Thus, within each brigade, three areas with different distances by rail include the first area (distance 0 to 250 meters), the second area (distance 250 to 500 meters) and the third area (distance 500 to 1000 meters) from Railway was considered and vegetation and soil samples were taken. Within each area, 4 100-meter transects were randomly placed and 2 plots at the beginning and end of each transect were systematically placed. The reason for comparison of more than two groups was analyzed using one-way analysis of variance and Duncan test using SPSS software.
Results and discussion: The results of this study showed that the construction of a railway in the Kalmand-Bahadoran Protected Area and the measures taken during the construction process may affect the physical and chemical properties of soil and vegetation, which in the Artemisia type causes a significant decrease in the production of plant vegetative form srub (0.81 g) (P <0.05). Also, a significant decrease in electrical conductivity (0.78 ds/m), potassium (0.64), acidity (7.7),lime percentage (26.25) (P <0.05), and percentage of clay (4%) (P <0.01) was observed. In the Cornulaca type, construction of railways significantly increased production (6.13 g), density (1.42), and percentage of cover form shrub (6.01) (P <0.05). It also significantly reduced the production of shrub vegetative form (0), the percentage of shrub vegetative form cover (0.17) (P <0.05) and the density of shrub vegetative form (0) (0.01), (P <0.01). Regarding the effect of railway construction on soil parameters of this type, it can be said that railway construction causes a significant increase in the percentage of rock (93%) and a significant decrease in the percentage of silt (2%), electrical conductivity (ds / m66 (P <0.05) and also significantly reduced organic matter (0.18), phosphorus (5.25 ppm) and potassium (0.63 ppm) (P <0.01).
Conclusion:The construction of the railway and activities that take place during the processes for the construction of the railway units can cause the movement of soil around the railway, whichcauses soil and water erosion in the region that may lead toa decrease in soil quality in the areas near the railway and consequently, the decrease of vegetation production in the area.

Keywords

References

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Environmental Sciences
Volume 19, Issue 4
January 2022
Pages 165-182

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