環境科学院 植物生態学セミナー   2011-11-29 (Tue) 10:30
(Room: A809 )

Selection of native legume species Egusi (Colocynthis citrullus L.) and Cowpea (Vigna unguiculata L. Walp) for restoration of post-mind lands in Ghana.

Catherine Appiah
(Chairperson: OROU M.T.B. Augustin )

Gold mining in Ghana from the pre-colonial period through to present is about 1000 years now. Initially the Arab traders crossed the Sahara Desert to the Ancient Kingdom Ghana in search of gold and later the British found it a colony called Gold Cost which later became the present-day Ghana. From the short history above, it is clearly seen that Ghana has played a major role in the world's gold production and gold is still the country's second largest forest exchange earner after agriculture, according to the Ministry of Mines, Energy and Environment. However, the gold deposits occur in three regions which housed Ghana's tropical rainforest and the deciduous forests which are the home to the most biodiversity plants and animals, including three critically endangered tree species on IUCN lists. This has resulted in severe competition between environmental conservation and economic development. There are three actors on the field, the government, registered companies and small scale miners, including illegal miners who have little respect for the environment. At present, increased natural habitat disturbances in these three main forest regions of the country, namely, Ashanti, Western and Brong Ahafo Regions have become widespread which need immediate reclamation and habitat restoration. The main problem is that there is little choice of plant material to use for revegetating these disturbed lands because many available legumes and plant materials are not well adapted to survive and reproduce in these harsh environments. Some of the introduced plants species which are adapted to these environment have also become a concern because they have been persistent and invasive and have replaced indigenous plant communities in the adjacent lands. The aim of this study is therefore to experimentally testing Cowpea (Vigna unguiculata L. Walp) and Egusi (Colocynthis citrullus L.) for their ability to germinate, survive, reproduce and establish in these harsh environment. The selection of these species was based on their native status, stress tolerance and nitrogen fixation. In This presentation, I will talk about preliminarily germination experiment conducted on the two species above in the greenhouse and the results obtained.


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