Iranian Journal of Forest

Iranian Journal of Forest

Evaluation of age and moisture stress on the mechanical properties of Pinus eldarica Medw. seedling roots for plantation

Document Type : Research Paper

Authors
Mohammad Asgari 1
Mohsen Javanmiri 2
Ehsan Abdi 3
Vahid Etemad 4
Khaled Ali 2
Salman Zare 2
Akram Afshar 5
1 Ph.D. Student of Forest Biological Sciences, University of Tehran, Faculty of Natural Resources
2 University of Tehran
3 Department of Forestry, University of Tehran
4 Forestry and forest economic department
5 University of tehran
10.22034/ijf.2023.363076.1893
Abstract
Introduction: The mechanical characteristics of roots can serve as a significant factor for selecting trees in the plantation of arid regions for soil bioengineering. This research aims to evaluate the mechanical characteristics of Tehran pine roots at various vegetative ages (one-year-old, three-year-old, and five-year-old seedlings) and under different water stress levels (light, medium, and severe) in Robat Karim.
Materials and Methods: The mechanical properties of the roots were studied after estimating the water requirement of the studied seedlings at different ages for one year and based on the water stress levels. Then, five seedlings from each treatment (equal to 9 treatments) were selected and coded completely randomly to evaluate the water stress on the mechanical characteristics of the roots of Tehran pine. Initially, some root parameters such as root diameter, length of the whole root, length of thin roots, and length of the longest root were measured. Then the tensile force, tensile strength, and Young's modulus of the roots were measured and recorded using a standard Centam device.
Findings: The results showed that with the increase in root diameter, the tensile force of the root changes based on the positive power relationship, and the tensile strength and Young's modulus of the root changes based on the negative power relationship. Furthermore, laboratory examinations showed that at any age, the length of the whole root and the root length densities are higher with the increase in water stress. The use of covariance analysis showed that the results of the average comparison between one-year-old age and mild drought stress, three-year-old age and moderate stress, and five-year-old age and severe stress are significant with a probability of 95%.
Conclusion: The results of this research show that the mechanical characteristics of the root can be used as an important factor for the selection of pine seedlings in the afforestation of arid areas for soil bioengineering purposes. Therefore, it is recommended that these properties be considered in soil reinforcement modeling.
Keywords
Root
Water Stress
Mechanical Properties
Age
Tehran Pine
Abdi, E., Majnounian, B., Rahimi, H., & Zobeiri, M. (2009). Distribution and tensile strength of Hornbeam (Carpinus betulus) roots growing on slopes of Caspian Forests, Iran. Journal of Forestry Research, 20(2), 105-110. doi.org/10.1007/s11676-009-0019-x.
Abdi, E., Azhdary, F., Abdulkhani, A., & Sofy Mariv, H. (2014). Tensile strength and cellulose content of Persian ironwood (Parrotia persica) roots as bioengineering material. Journal of Forest Science, 60(1), 425-430. doi: 10.17221/44/2014-JFS.
Abdi, E., & Majnounian, B. (2018). Forest Road Maintenance. University of Tehran press (In Persian).
Abdi, E. (2018). Root tensile force and resistance of several tree and shrub species of Hyrcanian forest, Iran. Croatian Journal of Forest Engineering: Journal for Theory and Application of Forestry Engineering. 39(2), 255-270.
Abdi, E., & Deljoue, A. (2018). Seasonal and spatial variability of root reinforcement in three pioneer species of the Hyrcanian forest. Austrian Journal of Forest science, 3, 175- 198.
Afshar, S.A., Etemad, V., Abdi, E., Attarod, P., & Deljouei, A. (2020). Effect of slope on characteristics of Oak root system.‌ Journal of Forest Research and Development, 6(2), 313-327. doi: 10.30466/JFRD.2020.120855 (In Persian).
Agh, Kh., Esmaeili, M., Hossini Moghaddam, H., & Mostafalo, H. (2017). The Assessment on Propagation Methods and Establishment of Astragalus podolobus Species in Arid Rangelands in North of Gonbad-e Qabus. Journal of Desert ecosystem engineering, 6‌(16), 1-10. doi: 10.22052/6.16.1 (In Persian).
Ahmadaali, Kh., Rahimi, H., & Etemad. V. (2021). Effect of Soil Texture and Different Levels of Irrigation Amount on Water Requirement and Crop Coefficient of Melia azedarach L. in Karaj Area. Iranian Journal of Soil & Water Research, 51‌(12), 3195- 3205. doi:10.22059/IJSWR.2020.303336.668627. (In Persian)
Alizadeh, A. (2014). Soil, Water, Plant Relationship. Industrial University of Sajjad Publications (In Persian).
Amiri, M.J., & Eslamian, S.S. (2010). Investigation of climate change in Iran. Journal of Environmental Science and Technology, 3‌(4), 208-216. doi: 10.3923/jest.2010.208.216.
Asgari, M., Javanmiri Pour, M., Etemad, V., Liaghat, A., & Zare, S. (2022). Estimation of Water Requirements of Acer negundo and Pinus eldarica Medw. in Field and Green House (Case Study: Robat Karim Town). Iranian Journal of Soil & Water Research, 52‌(10), 2581- 2594. doi:10.22059/IJSWR.2021.329702.669062 (In Persian).
Bandurska, H. (2022). Drought Stress Responses: Coping Strategy and Resistance. Journal of Plants, 11, 1-17. doi: 10.3390/plants11070922.
Boldrin, D., Leung, A.K., & Bengough, A.G. (2017). Root biomechanical properties during establishment of woody perennials. Ecological Engineering, 109, 196-206. doi.org/10.1016/j.ecoleng.2017.05.002.
Bybordi, M. (2011). Principles of Irrigation Engineering; Vol. 1: Soil- Water Relationship. University of Tehran press (In Persian).
Carbon, B.A., Bartle, G.A., Murray, A.M., & Macpherson, D.K. (1980). The distribution of root length, and the limits to flow of soil water to roots in a dry sclerophyll forest. Journal of Forest Science, 26, 656- 664.
Cislaghi, A. (2021). Exploring the variability in elastic properties of roots in Alpine tree species. Journal of Forest Science, 67(7), 338-356.‌ doi: 10.17221/4/2021-JFS.
Deljouei, A., Abdi, E., Schwarz, M., Majnounian, B., Sohrabi, S., & Dumroese, K. (2020). Mechanical Characteristics of the Fine Roots of Two Broadleaved Tree Species from the Temperate Caspian Hyrcanian Ecoregion. Journal of Forests, 11‌(345), 2-19. doi.org/10.3390/f11030345.
Esmaiili, M., Abdi, E., Jafary, M., & Majnounian, B. (2017). Comparison of biotechnical characteristics of root in two forest plantations of Fraxinus excelsior and Picea abies. Forest Research and Development, 3(3), 237-247.
Esmaiili, M., Abdi, E., Mohseni Saravi, M., & Hayati, E. (2022). Soil Water Storage and Root Distribution under Picea abies and Fraxinus excelsior Plantations. Iranian Journal of Forest, 14(4), 355-369. doi:10.22034/IJF.2022.313303.1810 (In Persi

  • Receive Date 03 July 2024