Document Type : Original Article
Authors
1
Ph.D. of Range Management, Institute of Agricultural Education and Extension, Tehran, Iran.
2
Ph.D. of Range Management, University of Agricultural Sciences and Natural Resources, Tehran, Iran.
3
Ph.D. of Range Management, University of Agricultural Sciences and Natural Resources
10.22092/mpt.2025.370336.1197
Abstract
The growth, distribution, and quality of plant production in various ecosystems worldwide are influenced by a range of environmental factors. This study aimed to investigate the ecological relationships of the medicinal plant licorice (Glycyrrhiza glabra) and identify the key environmental factors affecting its distribution, growth, and production quality in the middle pastures of Taleghan, Alborz Province, Iran. Vegetation cover data, plant characteristics, and environmental factors were collected through field sampling using the minimum area method, with 40 plots established along four 100-meter transects. Parameters such as canopy cover percentage, plant count, height, diameter, and biomass quality were recorded, alongside physical and chemical soil properties (including texture, pH, organic matter, nitrogen, and lime content). Analyses were conducted using TWINSPAN and PCA methods. Results indicated that key factors, including slope (20-40%), elevation (2300-2500 meters), and soil characteristics (sandy loam texture, high organic matter, adequate nitrogen, and low lime), significantly influence the distribution, growth, and quality of G. glabra. Optimal conditions for achieving maximum growth and high-quality root production were found in fertile soils with the aforementioned properties. This study provides valuable insights for sustainable pasture management and the cultivation of this valuable medicinal species
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