Determination of optimum tapping date for gum arabic production in South Kordofan State, Sudan

Abstract

Acacia senegal, the gum arabic producing tree, is the most important tree species for the livelihood of the people in South Kordofan State, Sudan. The objective of this study was to determine the optimum tapping date for gum arabic production in the study area. A randomized complete block design experiment with three replications was conducted at (Meari) area for two continuous growing seasons 2008/2009–2009/2010. The treatments comprised six tapping dates (1 Oct, 15 Oct, 1 Nov, 15 Nov, 1 Dec, and 15 Dec). Results showed highly significant differences (p < 0.001) in gum arabic yield (g√ee) in all pickings and in the total gum yield between the tapping dates. The results also showed that tapping of trees on 15 October and 1 November gave a higher yield compared to the other dates. The highest gum yield of 1086.6 and 661.2 g/tree was recorded on 15 October and 15 November, while the lowest gum yield of 297.9 g/tree was recorded when the trees were tapped on 1 October. The two highest-yield dates of tapping (15 Oct and 1 Nov) are recommended as the best time for tapping for gum arabic production in South Kordofan State. These results can be used to increase gum arabic production and farmer income in South Kordofan State.

Keywords

gum Arabic / date of tapping / agroforestry system / South Kordofan / Sudan

References

[1] Adam I.M.. An ecological study on Acacia senegal (L.) Willd. With emphasis on understory cover and gum arabic yield. 2005, Sudan: University of Kordofan

[2] Awouda EHM. 2000. Production and commercialization of gum arabic. Workshop on Management of Trees for Farmland Rehabilitation and Development, Khartoum, Sudan.

[3] Awouda HM. 1974. Production and Supply of Gum Arabic. Khartoum Sudan.

[4] Awouda HM. 1985. Out look for gum arabic production and supply, in hydrocolloids and gelling agents, Solingen, 1986

[5] Badi KHM, Ahmed AE, Bayoumi MS. 1989. The Forest of the Sudan. Forest National Corporation. Khartoum.

[6] Ballal M.E.. Acacia senegal: A multi-purpose tree species for Arid and Semi-arid Tropics. 1991, United Kingdom: University of Wales

[7] Ballal ME, Hamid AHA. 2000. Research and development for afforestation, reforestation and tree management for rehabilitation of degraded farmland on the sandy soils in the Sudan. Workshop on Management of Trees for Farmland Rehabilitation and Development, Khartoum, Sudan.

[8] Ballal ME. 2002. Yield trend of gum arabic from Acacia senegal as related to some environmental and managerial factors. Ph.D. Thesis. Faculty of Forestry, University of Kharoum.

[9] Ballal ME. 2002. Gum arabic yield in relation to stand type and management in North Kordofan-A paper presented on the 44th meeting of the National Crop husbandry Committee, proceeding pp 129–144, Wad Medani, 18 June, 2008.

[10] Ballal M.E., ElSiddig E.A., El Fadl M.A., Luukkanen O.. Gum arabic yield in differentially managed Acacia senegal stands in western Sudan. Agroforestry Systems, 2005, 63: 237-245.

[11] Ballal ME. 2008. Relationship between climatic factors, tapping and gum arabic yield of Acacia senegal plantations in western Sudan-Paper released at the 44th National Crop Husbandry Committee Meeting, 18 June 2008, ARC, Wad Medani, Sudan.

[12] Bashir M.. Sudan country study on Biodiversity. 2001, Khartoum, Sudan: Silver Star press

[13] Beshal A.. The economics of a primary commodity: Gum Arabic. Oxford Blletin of Economics and Statistics, 1984, 46(4): 371-381.

[14] Coe M., Beentje H.. A field guide to the Acacias of Kenya. 1991, London: Oxford University Press, 148.

[15] Coppen J.J.W.. Gums, resins and latexes of plant origin. 1995, Rome: FAO

[16] Fadl KE, Gebauer J. 2004. Effect of different tapping tools and different tapping positions on ‘talh gum’ yield of A. seyal var. seyal in South Kordofan, Sudan. Deustcher Tropentag 2004, Berlin, Germany.

[17] FAO. 1990. Towards Agricultural Development in the Sudan. Objectives, Issues and Polices. Rome.

[18] Fischer S.D.. MSTAT-C statistical package. 1990, USA: Michigan state University

[19] Hussein S.E.G.. A preliminary study of soils under Acacia senegal (L.) Willd. Sudan Silva, 1983, 5(25): 125-135.

[20] Larson B.A., Bromley D.W.. Natural resources prices, export policies and deforestation: The case of Sudan. World Development, 1991, 19(10): 1289-1297.

[21] NAS. Fire wood crops: shrubs and tree species for energy production. Volume 1 and 2. 1979, Washington, DC: National Academy Press, 329.

[22] NAS. 1986. Tropical legumes. Washington, USA.

[23] Raddad EYA. 2006. Tropical dryland agro-forestry on clay soils: Analysis of systems based on Acacia senegal in the Blue Nile region, Sudan. Academic dissertation, Viikinkaari 11, Helsinki, Finland.