Investigating the impact of ecological factors affecting the distribution and morphological traits of the medicinal and industrial plant Reseda lutea L. in the rangeland of Darab city

Document Type : Research Paper

Authors

1 Assistant Professor, Department of Nature Engineering, Faculty of Agriculture and Natural Resources of Darab, Shiraz University, Shiraz, Iran

2 Associate professor, Department of Range and Watershed Management (Nature Engineering), Faculty of Agriculture, Fasa University, Fasa, Iran

10.29252/aridbiom.2024.21165.1991

Abstract

The present study was conducted to investigating the effect of ecological factors on the distribution and morphological traits of Reseda lutea L. as a medicinal and industrial plant in rangeland of Darab. Two habitats were selected, and two transects were established in each habitat, ten plots with 2x1 m2 were established. In each plot the number of spurs, the canopy cover and the height of the spurs, and 40 soil samples were taken from the depth of plant rooting to determine soil characteristics. In order to investigate the relationship between morphological traits, density and cover with the soil properties of the habitats, multivariate ranking methods were used. Redundancy Analysis (RDA) method was used to rank morphological traits with environmental factors. All statistical calculations for ranking were done using CANOCO software version 5. The results showed that the coverage percentage and density of the R. lutea are 32.27% and 5.8% respectively. The average of plant height, canopy diameter, inflorescence length and the number of flowering branches are 55.37, 71.65, 35.42 and 63.67 cm, respectively. Spurs is distributed in acidic soils (6.1-7.75), with an average electrical conductivity of 0.62 ds/m and an average of organic carbon of 0.45. The amount of potassium and phosphorus ranges from 110 to389 and 6 to 21 ppm. Spurs is distributed in the altitude range of 1124 to 1225 meters with an average 1179.43. Height and canopy diameter are more influenced by silt and soil OC and less influenced by potassium and phosphorus. The number of flowering branches, density and canopy cover are more influenced by EC and less influenced by height. The results of this study can be used into consideration by natural resource managers in order to investigate the growth of this species in the improvement and restoration of rangeland in similar areas.

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