Browsing by Author "Chekol, Habtamu"
Now showing 1 - 1 of 1
Results Per Page
Sort Options
Item Measuring the Extent of Restoration using Coffea Arabica L. as a Bioassay Plant(Addis Ababa University, 2013-07) Chekol, Habtamu; Prof. Legesse NegashThis study was undertaken as part of the ongo ing biological restoration efforts at the "Center for Indigenous Trees Propagation and Biodi versity Development in Ethiopia" (50·55 Km west of Addis Ababa, 09°01' 188" N; 038~1'566" E). The main objective of the study was to measure extent of restoration over a degraded landscape usi ng CoJJea arabica L. as a bioassay plant. In order to measure this, the phrase " Restoration Bioassay" was coined for coffee plants which were established beneath Acacia abysl'inica, Croton macrostachYlil' and Ellclea divinorum. The trees were regenerated after 5-6 years' of intensive restorat ion acti vi ties. All the vegetat ive and reproductive responses were quantified on randomly se lected 3 to 5 year·o ld coffee plants. Al so, soil samples from the si tes being restored, and those From the non- restoring adjacent areas were collected and analyzed for macro- and micro-n utrients, as well as for texture, moisture, density and elect rical conduct ivi ty. Through thi s study, it was found that mean number of nodes, leaves, as well as internode lengths were significantly (P<0.05) greater for coffee plants establ ished and maintained for 3-4 years beneath the A. abyssinica shades, compared to those beneath the C. mocros/(lchYlIs and E. divillorllm shades. Although no significant difference was found in height growth. mean leaf area of coffee plants that benefited by the shade of A. abyssinica was different, compared to those grown beneath the shades of C. macrostachYlis or E. divinorlll1l. Further, key phys iological and/or economic indices such as number of green berries, fresh weight of berries, s ize of beans, mature red berry harvest per plant, berry to bean ral io, weight of bean per berry. as well as weight per 1000 iii beans were all sign ifican tly (P