Abstract
Background
In Ethiopia, traditional medicine based mainly on medicinal plants, has been used for centuries for the treatment of human and animal health problems. The objective of this study was to document medicinal plants used to treat human and domestic animals ailments as well as the associate indigenous knowledge and conservation methods in Raya Alamata District in Northern Ethiopia.
Methods
Ethno-botanical data were collected through semi-structured interviews, guided field walks, group discussions, field observations, preference ranking, paired comparison and direct matrix. The data were analyzed by descriptive statistics, informant consensus factor, and various ranking methods.
Results
The results showed 47 medicinal plant species belonging to 44 genera and 31 families. The plants were used to treat 27 human and 8 livestock diseases. Among others, members of Fabaceae were leading in terms of the number of medicinal plant species composition, consisting of 9 species. Of these species, the majority (53.19%) grew naturally in the wild. Herbs took the lead in terms of the number of plants used in the preparation of remedies, constituting 46.81% of the species, followed by shrubs that instituted 27.66%. Leaves were the most commonly used plant part, constituting 41.94% of the total uses, followed by roots, constituting 20.97%. Dermal route of administration was the most commonly used route of administration (43.55%), followed by oral route of administration (38.71%). Direct matrix ranking showed Balanites aegyptiaca L. as the most preferred multipurpose species in the community. Paired ranking indicated that Aloe megalacantha Bak. as the most commonly used medicinal plants for healing external wounds. Agricultural activity for new agricultural lands became seriously threatened medicinal plant resources. Many of the local communities with traditional medicinal knowledge gave priority to the immediate use of medicinal plants than to the sustainable uses. Particularly, the collection method of plants or plant parts for medicinal use is mostly destructive.
Conclusion
local communities heavily depend on traditional medicinal plants and associated knowledge for treating human and livestock ailments. However, medicinal plants and the associated knowledge are eroding mainly due to agricultural expansion, deforestation and land degradation for seeking new agricultural lands and firewood, as well as the unsustainable practices of plant or plant part sampling for medicinal values. Thus, public awareness needs to be raised among local communities and all other stakeholders on sustainable utilization and management of medicinal plant resources and associated knowledge. On the top of that ex-situ and in-situ conservation measures in particular should be taken for the sustainable management of medicinal plants and the indigenous knowledge.
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