Journal of Range and Watershed Managment

Allelopathic Effects of Eucalyptus camaldulensis on Seed Germination and Initial Growth of Three Medicinal species

Document Type : Research Paper

Authors

Morteza Saberi 1
Vahid Karimian 2
Majid khazaei 3

1 Assistant professor, Range and watershed management department, Water and Soil collage, University of Zabol, Iran

2 Ph.D. Graduate, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.

3 3- Assistant Professor, Forests, Rangelands and Watershed Management Enginering, Department, Kohgiluyeh & Boyerahmad Agricultural and Natural Resources Research and Education Center, Agricultural Research , Education and Extension Organization (AREEO), Yasouj, Iran.

https://doi.org/10.22059/jrwm.2021.303243.1507
Abstract
The allelopathic influence of aqueous extracts of Eucalyptus camaldulensis on Cassia angustifolia Vahl., Datura stramonium L. and Hibiscus sabdariffa L. germination (%), germination stages and seedling growth were examined. For this goal, the extract was prepared from the shoot and roots of Eucalyptus camaldulensis firstly. The extract was diluted by adding distilled water to 0 (control), 25, 50, 75 and 100 percent. The effect of the four mentioned treatments, as well as distilled water as control were studied in four repetitions on seed germination using a completely randomized design. Results showed that there were significant differences among the measured characteristics for germination percentage and speed, length of root, length of shoot, length seedling and vigority index (p<1%) in all three species. Comparison of means indicated that increasing the concentration of allelopathic extract of Eucalyptus decreased seed germination and initial growth of seedlings in all three species significantly. The highest germination percentage and speed was belonging to Hibiscus sabdariffa (60% and 3.5) at zero concentration (control). Also, germination of Datura stramonium done only until concentration of 25 percent (20%) and at concentrations 50, 75 and 100 % it was zero. According to the results Datura stramonium had more sensibility than two other species related to allelopathic effect of Eucalyptus camaldulensis. Generally, it is recommended not to plant eucalyptus as a windbreak with medicinal species Cassia angustifolia, Datura stramonium and Hibiscus sabdariffa as much as possible in the study area.

Keywords

Germination
Allelopathy
Extract
Eucalyptus camaldulensis
Medicinal plant
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Journal of Range and Watershed Managment
Volume 74, Issue 3
Autumn 2021
Pages 585-596

  • Receive Date 15 June 2020
  • Revise Date 14 October 2021
  • Accept Date 18 October 2021
  • Publish Date 22 November 2021

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