Effects of Bromus kopetdaghensis Drobov Pit-Seeding on Soil and Vegetation Characteristics in a Semi-Arid Rangeland

Document Type : Brief Communication

Authors
1 Associate Professor, Department of Nature Engineering, Malayer University, Malayer, Iran
2 Postgraduate Student of Rangeland Management, Department of Nature Engineering, Malayer University
Abstract
Aims: Pit-seeding is widely recognized as a primary method for rangeland improvement in hilly and sloping areas. This research aimed to investigate the impact of pit-seeding on soil and vegetation properties in the semi-arid rangelands of Hamadan Province.

Materials & Methods: Systematic random sampling was conducted in May 2022. Ten 100-meter transects were established in the pit-seeding area, and an equal number of samples were collected from an adjacent uncultivated control area.

Findings: ANOVA analysis revealed no significant differences in soil bulk density (SBD), soil moisture content (SMC), or pH values between pit-seeding and control regions. However, the electrical conductivity (EC) of soil in the control region was 5.9 ds.m⁻¹, which was significantly higher than 4.3 ds.m⁻¹ in the pit-seeding area. Statistical comparisons (p<0.05) of soluble sugar levels showed that plants in the pit-seeding area had significantly higher sugar content than those in the control region. Additionally, the highest numerical values for bioindicators (richness, evenness, and diversity) were observed in the pit-seeding area, while the lowest values were recorded in the control region. Proline, catalase (CAT), and peroxidase (POD) levels were significantly higher in the control region, likely due to livestock grazing. Soil nutrient levels, including calcium (Ca), magnesium (Mg), copper (Cu), iron (Fe), manganese (Mn), and zinc (Zn), were also notably greater in the control region.

Conclusion: Pit-seeding improved vegetation quality and strengthened ecological bioindicators in semi-arid rangelands, fostering healthier plant communities. This method effectively reduced soil electrical conductivity, creating more favorable conditions for vegetation growth. Moreover, pit-seeding maintained higher soil nutrient levels, underscoring the importance of sustainable grazing practices in preserving ecosystem balance.
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Abdalla M, Hastings A, Chadwick DR, Jones DL, Evans CD, Jones MB, Rees RM, Smith P. Critical review of the impacts of grazing intensity on soil organic carbon storage and other soil quality indicators in extensively managed grasslands. Agric Ecosyst Environ. 2018;253:62–81.
Agarwal S, Pandey V. Antioxidant enzyme responses to NaCl stress in Cassia angustifolia. Biol Plantarum. 2004;48(4):555–60.
An H, Li GQ. Effects of grazing on carbon and nitrogen in plants and soils in a semiarid desert grassland, China. J Arid Land. 2015;7:341–9.
Azimi R, Khajeh-Hosseini M, Fallahpour F. Study of seed germination characteristics of Bromus kopetdaghensis (Drobov) under the influence of different temperature treatments. Rangeland Watershed Manag J, Iranian Nat Resour J. 2014;67(2):253–61.
Bates LS, Waldren RP, Teare ID. Rapid determination of free proline for water-stress studies. Plant Soil. 1973;39:205–7.
Chance M, Maehly AC. Assay of catalases and peroxidases. Meth Enzymol. 1955;2:764–817.
Clifford HT, Stephenson W. An Introduction to Numerical Classification. London: Academic Press; 1975. 229 p.
Coote L, French LJ, Moore KM, Mitchell FJG, Kelly DL. Can plantation forests support plant species and communities of seminatural woodland? For Ecol Manage. 2012;283:86–95.
Foth HD. Fundamentals of Soil Science. 8th ed. New York: John Wiley & Sons; 2006.
Ghobadi A, Akhzari D. Effects of rangeland exclosure on chemical and organic properties of soil (Case study: Gonbad Area). J Environ Sci Tech. 2021;22(10):221–32.
Ghorbani A, Dadjou F, Moameri M, Fekri A, Andalibi L, Biswas A, Mohammadi Moghadam S, Sharifi J. Effect of grazing exclusion on soil and vegetation characteristics in desert steppe rangelands: A case study from northwestern Iran. Arid Land Res Manag. 2020; 35(2):213–29.
Gillen RL, McCollum FT, Tate KW, Hodges ME. Tallgrass prairie response to grazing system and stocking rate. J Range Manage. 1998;51:139–46.
Hendricks HH, Bond WJ, Midgley JJ, Novellie PA. Plant species richness and composition along livestock grazing intensity gradients in a Namaqualand (South Africa) protected area. J Plant Ecol. 2005;176:19–33.
Hickman K, Hartnett D, Cochran R, Owensby C. Grazing management effects on plant species diversity in tallgrass prairie. J Range Manage. 2004;57:58–65.
Hue N. Soil acidity: development, impacts, and management. In: Giri B, Kapoor R, Wu QS, Varma A, editors. Structure and Functions of Pedosphere. Springer, Singapore; 2022. p. 103–31.
Irob K, Blaum N, Tietjen B. Navigating uncertainty: Managing herbivore communities enhances Savanna ecosystem resilience under climate change. J Appl Ecol. 2024; 61:551–63.
Kamali P, Erfanzadeh R. The effect of livestock grazing on diversity, species richness, and some physical and chemical characteristics of soil. 2013; 4(1): 1-13.
Krebs CJ. Ecological Methodology. 2nd ed. Addison-Wesley Educational Publishers, Inc.; 1999. 620 p.
Lai L, Kumar S. A global meta-analysis of livestock grazing impacts on soil properties. PLoS ONE. 2020;15(8):e0236638.
Li T, Peng L, Wang H, Zhang Y, Wang Y, Cheng Y, Hou F. Multi-cutting improves forage yield and nutritional value and maintains the soil nutrient balance in a rainfed agroecosystem. Front Plant Sci. 2022;13:825117.
Li W, Sun Q, Zhang S, Hu X, Asiya M, Xiong J, Wang M, Wang X, Long R, Jin G. Trampling and dung and urine addition of livestock increase the soil organic carbon in mountain meadows by augmenting the organic carbon in different aggregates. Agronomy. 2025;15(4):843.
Liebig MA, Gross JR, Kronberg SL, Hanson JD, Frank AB, Phillips RL. Soil response to long-term grazing in the northern Great Plains of North America. Agric Ecosyst Environ. 2006;115(1–4):270–6.
Luan J, Cui L, Xiang L, Wu J, Song H, Ma Q, Hu Z. Different grazing removal exclosures effects on soil C stocks among alpine ecosystems in east Qinghai–Tibet Plateau. Ecol Eng. 2014;64:262–8.
Mabberley DJ. The Plant-Book. 103rd ed. Cambridge University Press; 1997. 858 p.
Mligo C. Effect of grazing pressure on plant species composition and diversity in the semi-arid rangelands of Mbulu district, Tanzania. Agric J. 2006; 1:277–83.
Mohammadi F, Ahmadi A, Toranjzar H, Shams-Esfandabad B, Mokhtarpour M. The effects of environmental factors on plant diversity of Darab natural ecosystems in Fars Province, Iran. Environ Monit Assess. 2023;195:1555.
Momeni E, Antipova A. A micro-level analysis of commuting and urban land using the Simpson's index and socio-demographic factors. Appl Geogr. 2022;145:102755.
Ogiyama S, Sakamoto K, Suzuki H, Ushio S, Anzai T, Inubushi K. Measurement of concentrations of trace metals in arable soils with animal manure application using instrumental neutron activation analysis and the concentrated acid digestion method. Soil Sci Plant Nutr. 2006;52(1):114–21.
Rahmanian S, Hejda M, Ejtehadi H, Farzam M, Memariani F, Pyšek P. Effects of livestock grazing on soil, plant functional diversity, and ecological traits vary between regions with different climates in northeastern Iran. Ecol Evol. 2019; 9(14):8225–37.
Rahmanian S, Hejda M, Ejtehadi H, Farzam M, Pyšek P, Memariani F. Effects of livestock grazing on plant species diversity vary along a climatic gradient in northeastern Iran. Appl Veg Sci. 2020; 23(4):551–61.
Rigi M, Fakhireh A. Study of grazing intensities on plant species richness and diversity indices for preserving the ecosystems of Taftan’s rangelands. J Plant Ecosyst Conserv. 2013;1:105–18.
Sadasivam S, Manickam A. Biochemical methods for agricultural sciences. New Delhi: Wiley Eastern Limited; 1992. p. 193–4.
Saghafi Khadem F, Shahabi M. Autecology of range plant species Bromus kopetdaghensis Drobov in Khorasan Razavi province. Desert Ecosyst Eng J. 2015;4(7):29–42. (in Persian).
Shafi A, Zahoor I, Mushtaq U. Proline accumulation and oxidative stress: diverse roles and mechanism of tolerance and adaptation under salinity stress. In: Akhtar M, editor. Salt Stress, Microbes, and Plant Interactions: Mechanisms and Molecular Approaches. Springer, Singapore; 2019. p. 269–300.
Shannon CE, Wiener W. The Mathematical Theory of Communication. Urbana: University of Illinois Press; 1949. 350 p.
Shen J, Yuan L, Zhang K, Li H, Bai Z, Chen X, Zhang W, Zhang F. Phosphorus dynamics: From soil to plant. Plant Physiol. 2011;156(3):997–1005.
Shrivastav P, Prasad M, Singh TB, Yadav A, Goyal D, Ali A, Dantu PK. Role of nutrients in plant growth and development. In: Naeem M, Ansari A, Gill S, editors. Contaminants in Agriculture. Springer, Cham; 2020.
Simpson EH. Measurement of diversity. Nature. 1949;12:1–20.
Steffens M, Kölbl A, Totsche KU, Kögel-Knabner I. Grazing effects on soil chemical and physical properties in a semiarid steppe of Inner Mongolia (P.R. China). Geoderma. 2008;143(1–2):63–72.
Sun J, Wang N, Niu Z. Effect of soil environment on species diversity of desert plant communities. Plants. 2023;12:3465.
Teague R, Kreuter U. Managing grazing to restore soil health, ecosystem function, and ecosystem services. Front Sustain Food Syst. 2020;4:534187.
Tesfay F, Kibret K, Gebrekirstos A, Hadgu KM. Litterfall production and associated carbon and nitrogen flux along exclosure chronosequence at Kewet district, central lowland of Ethiopia. Environ Syst Res. 2020;9(11).
Van der Westhuizen HC, du Preez CC, Snyman HA. Rangeland degradation impacts on vegetation cover, soil properties and ecosystem functioning in an arid and semi-arid climate, South Africa. J Geosci Environ Prot. 2022;10:10–32.
Wang Y, Ju X, Wu Q, Han G. Effects of grazing intensity on microbial diversity at different soil depths in desert steppe soils. Agronomy. 2025;15(1):124.
Warren A. Land degradation is contextual. Land Degrad Dev. 2002; 13(6):449–59.
Xu Z, Li X, Zhang L. Moderate grazing intensity and pika disturbance can enhance plant diversity and soil nutrient cycling in the alpine grasslands of the Qinghai-Xizang Plateau. J Arid Environ. 2025;45(1):108–16.
Yadav DS, Jaiswal B, Gautam M, Agrawal M. Soil acidification and its impact on plants. In: Singh P, Singh SK, Prasad SM, editors. Plant Responses to Soil Pollution. Springer, Singapore; 2020. p. 1–26.
Yang Y, Wang Y, Peng Y, Cheng P, Li F, Liu T. Acid-base buffering characteristics of non-calcareous soils: Correlation with physicochemical properties and surface complexation constants. Geoderma. 2020;360:114005.
Zhang J, Zuo X, Zhou X, et al. Long-term grazing effects on vegetation characteristics and soil properties in a semiarid grassland, northern China. Environ Monit Assess. 2017;189:216.