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Ghana J. Sci. 56 (2016), 25 – 37

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Ghana J. Sci. 56 (2016), 25 – 37 Ghana J. Sci. 56 (2016), 25 – 37 ETHNOBOTANICAL STUDY OF THE USE OF NATURAL DYE PLANT SPECIES IN THE SOUTHERN FOREST-SAVANNA TRANSITION ZONE OF GHANA F. BAA-POKU* AND L. ENU-KWESI (F.B.-P.: Department of Environmental Management and Technology, Koforidua Polytech- nic, P. O. Box KF 981 Koforidua, Eastern Region, Ghana; L.E.-K.: Department of Plant and Environmental Biology, College of Basic and Applied Sciences, University of Ghana, Legon) *Corresponding author’s email: [email protected] Abstract Ethnobotanical studies were carried out in the United Nations University People’s Land-Use and Environmental Change (UNU/PLEC) demonstration sites of Gyamfiase-Adenya, Sekesua-Osonson and Amanase-Whanabenya with detailed floral inventory undertaken in the Gyamfiase-Adenya dem- onstration site. Ethnobotanical knowledge gathered from focus group discussions indicated that, a number of plant species were used traditionally as food colours and dyes for clothing. These includ- ed Alchornea cordifolia, Carica papaya, Citrus sinensis, Combretum mucronatum, Lecaniodiscus cupanioides, Mangifera indica, Lonchocarpus cyanescense and Morinda lucida. The use of these species for food colouring was widespread among females than among males. Food colouring was also found to be a common household practice although it was not commercialised. Floral inventory in the Gyamfiase-Adenya site indicated that Albizia zygia, Bombax buonopozense, Ceiba pentandra, Cola gigantea, Morinda lucida, Rauvolfia vomitoria and Terminalia ivorensis are left as standard trees in-situ on farms in traditional agro-forestry. Out of seven species screened initially as sources of materials for food colouring and dyes for clothing, Morinda lucida and Combretum mucronatum were predominant in the area. Whilst Combretum mucronatum was readily available in the fallows, Morinda lucida was found in each of the different land-use types (farms with annual crops, fallows and tree crop farms). Local communities with the support of district assemblies should be encouraged to maintain and pursue other effective and sustainable methods in the harvesting of these plants. Introduction purposes (Yujing, 2014). Traditional knowl- Plants have been used for various purposes edge of local people also plays a major role including food, housing, medicine, dyes, in the identification of natural resources for clothing, and leatherworks among others. commercialisation (Anon, 2005). Jansen The use of dye plants in enhancing food and &Cardon (2005) also recognised the impor- clothing in communities, however, is a prac- tant role in economic growth. ITDG (2003) tice that has existed for several decades. The further notes that, in most developing coun- practice, though widespread, is more com- tries, the diverse sources of dyes produced mon among indigenous communities in re- from natural dyes contribute to improved mote areas, where dyes derived from plants livelihood, particularly, through its use and are used both for colouring food products commercialisation. and clothing, as well as for other cultural Even though synthetic dyes have been 26 GHANA JOURNAL OF SCIENCE VOL. 56 commonly used on commercial basis in demographic characteristics of the people in Kenya, the use of natural dyes is still an the selected communities. The ethnobotani- old practice. Musyoki, Luvana & Kitheka cal uses of dye plant species in the transi- (2012) in a study that documented the trees tion zone and the sustainability methods of and other plant species used as sources of harvesting dye plant species in the selected natural dyes and tannins, identified some communities have also been discussed. plant sources for dyes and tannins. Some of these include Commiphora holtiziana (Hag- Experimental gar), Acacia bussei, L. inermis L (Elan) and Location Commiphora campestris Engl, among many The study was conducted in the United Na- others. tions University’s People Land Use and In Ghana the most popular use of plant Environmental Change (UNU/PLEC) dem- dyes in the forest zone is for the preparation onstration sites at Sekesua-Osonson (in the of saffron dyes from the bark of Bombax Krobo area), Gyamfiase-Adenya (Akwapim brevicuspe (onyinakobin) and Lannea wel- North) and Amanase-Whanabenya (Akwap- witschii (kumanini) for dyeing funeral cloths im South), all in the southern forest-savanna (kuntunkuni) and for stamping the adinkra transition zone of Ghana. The main sites se- signs and symbols (Abbiw, 1990). Dyes de- lected for the study included: Sekesua – Os- rived from plants in forests are usually non- onson; Gyamfiase – Adenya; and Amanase toxic and edible, and have, thus, been used – Whanabenya. as food colour in both traditional cooking Sekesua – Osonson. Sekesua – Osonson and formal commercial catering (Abbiw, UNU/PLEC, Ghana, demonstration site 1990). Throughout southern Ghana, forests is situated in the Eastern Region of Ghana serve as sources of food, especially during within the southern forest-savanna transition seasonal food shortages and other periods of zone. The ecosystem of the site provides the hardship (Falconer, 1992). Forests contrib- right environment for the growth of different ute to all aspects of rural life providing food, crops and other plants adapted to humid and fodder, fuel, medicine, building materials dry conditions. The characteristically high and household items, as well as many more agro-diversity observed reflected the cultur- intangible benefits such as cultural symbols, al imprint of migrant Krobo cocoa farmers ritual artefacts and sacred sites. The southern (PLEC News and Views, 2003) despite the forest – savanna transition zone of Ghana, system of monoculture that was also evident within which the study was carried out, is in the area. known to contain very diverse plant species Gyamfiase – Adenya. This site is about with a vegetation zone which contains most 70 km inland from Accra, the capital of of the country’s valuable timber species. Ghana and is in the Eastern Region. It is The paper provides a compilation of a situated off the main Mamfe – Adawso road. comprehensive inventory of forest species in The inhabitants are mainly natives and set- three communities of southern forest-savan- tler farmers. Gyamfiase has a sacred grove na transition zone of Ghana including the estimated to be about 20 ha in size. Apart VOL. 56 GHANA JOURNAL OF SCIENCE 27 Fig. 1. Map of the study area from the Gyamfiase village, there are about equatorial climatic region with two rainfall four other villages namely Bewase, Adenya, maxima. The mean annual rainfall is be- Obom and Otwetiri that surround the Gyam- tween about 1250 and 2000 mm. The first fiase sacred grove (Gyasi et al., 2004). rainy season is from May to June, with the Amanase – Whanabenya. This town is in- heaviest rainfall in June, and the second habited by a mixture of the offsprings of mi- rainy season is from September to October. grant Akuapim and Siade/Shai people, and a The dry seasons are quite pronounced. The growing component of recent migrant Ewe highest mean monthly temperature of about settler farmers. Landholding arrangements 30 °C occurs between March and April and are both the mosaic and linear huza type. the lowest of about 26 °C in August. Aver- Average annual rainfall ranges between age monthly relative humidities (RH) (based 1,200 and 1,450 mm. The main food crops on figures recorded each day at 12 noon) are grown in this area include cassava, maize, highest (75-80%) during the two rainy sea- plantain, cocoyam and oil palm. Apart from sons and lowest (70-80%) during the rest of farming, people in the area also indulge in the year (Dickson & Benneh, 2004). cassava processing, distillation of local gin (akpeteshie) and extraction of oil from fruits Vegetation and soils and kernels of oil palm (Gyasi et al., 2004). Akwapim is in the moist semi-deciduous forest zone of Ghana. This vegetation zone Weather and climate contains most of the country’s valuable tim- The study area falls under the wet semi- 28 GHANA JOURNAL OF SCIENCE VOL. 56 ber trees species. The moist semi- deciduous pants were involved in the study. The FGD forest is distinguished by trees in its upper was ideal because it helped to extract de- and middle layers exhibiting deciduous char- tailed qualitative information from partici- acteristics during the long dry season when pants. A focus group discussion guide was the influence of the harmattan is greatly felt. used to obtain information on the partici- The deciduous habit of the trees, in this belt, pants’ beliefs and perception on the follow- is by no means as strong and definite as ing: Knowledge of use of plants for dyes, among the deciduous trees of the temperate cosmetics and insecticides, use of plant parts zone. Trees of the lower layer of this forest for various purposes, sustainability of the remain evergreen during the dry season and harvesting techniques, and plant propaga- so do most of the young trees of the species tion and availability. which belong to the two uppermost layers. This may be due to the generally moist con- Description of field floral inventory ditions under the lower tree storey. A detailed floral inventory was carried out Due to the rapid expansion of the cocoa at Gyamfiase-Adenya. The area was divided industry in this vegetation zone, very little of into four cells comprising Cell A, Cell B, Cell the original forest remains and most of what C, and Cell D (Fig. 1). Each cell consists of is left is secondary forest. The size of trees a number of communities which also serves in the secondary forest depends on how long as the boundary of the cell. The boundary it has been abandoned by farmers for the of Cell A starts from Kwamoso, through to soils to recover (MEST, 2002). The principal Gyamfiase Adenya Junction, Gyamfiase soils, which cover nearly the whole area, are Adenya, Bewase and back to Kwamoso. forest Ochrosols, i.e. highly coloured soils. Cell B starts from Gyamfiase Adenya Junc- They develop over the same kinds of highly tion, through Mampong Nkwanta, Otwitiri, weathered parent materials.
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