Abstract Soil is one of the most important natural resources. Soil conservation and erosion reduction in different regions are at the forefront of economic empowerment. Vetiver (Chrysopogon zizanioides) cultivation is known as one of the most effective bioengineering solutions for stabilizing steep slopes. This effect was investigated in this study with the aim of investigating the capacity of Vetiver plants to be exposed to combined stress factors. This study represents the first experimental application of Vetiver (Chrysopogon zizanioides) for slope stabilization in temperate and cold mountainous regions of the world. This study was conducted on the lateral slopes of the Narmab Dam reservoir located in Minoodasht County, Golestan Province. In this study, soil and Vetiver root sampling was carried out from a depth of 0–50 cm along the dam reservoir wall with different degrees of slope: first level (60–70 degrees), second level (70–80 degrees), third level (80–90 degrees) with three replications. Root characteristics, including biomass weight, diameter, and root area ratio (RAR), were used in this study. These root extract profiles were extracted from dried roots using a methanol/water (80/20) solution by soaking and concentrated by rotary evaporation. The data were analyzed using analysis of variance and comparison of means (SPSS). The findings highlighted the significant effects of slope location and presence of Vetiver on soil stability, root biomass and root extract yield. The study showed that slope location and presence of Vetiver plants had significant effects on soil stability. The biomass and root diameter gradually increased up to a depth of 20 cm, with Vetiver roots increasing soil cohesion by %199, with the deepest level showing significantly higher values (p 80°), with an increase ranging from 27.327% to 78.13%. The increase in root biomass, diameter and extract yield indicates the adaptive response of the plant to environmental stresses. Planting Vetiver plants on steep slopes is recommended due to their high adaptability to different climates and conditions, their smart performance and the possibility of growing early seedlings.
Haghighi et al. (Mon,) studied this question.