Trend of Change in Herbaceous Cover in Low rainfall Rangeland (Tendalti area-White Nile State-Sudan)

Galal Abas Fasher

Abstract


The study was conducted at Tendlti locality at Whit Nile State during the periods 2004, 2010 and 2014. The aim of this study was to investigate the trend of change in Herbaceous Cover in Low rainfall Rangeland. Species area curve method was used for determination of the number of samples to be taken. For vegetation measurements the Parker loop method (Parker and Hirris, 1959) have been used to measure relative plants composition and ground cover of the rangeland using 100 meter tape and a ¾ loop placed at ground level at one meter intervals. In addition to the quadrate method (Wilm et al, 1944) was used to determine relative plants density, and biomass productivity. The results indicated that the temporal variation in the vegetation cover between the three periods as the result of variable rainfall. The heavy grazing, environmental factors and human activities were considered as the major factors responsible for the low vegetation cover and change of species composition in the study area. Results showed that Eragrostis spp and Cenchrus spp were dominant during three periods. This species have ability to adapt with condition characterizing the area and to the ability of the species to tolerate grazing. The study recommended that rangeland should be managed and conserved by increasing the vegetation cover and decreasing the grazing pressure on the natural vegetation.


Keywords


Rangelands, Plant cover, Plant composition, Biomass productivity, Low rainfall

References


- Abdalla, E.A., (2008) competition on range resources and its role on the conflict in Dar fur. Acase study El daein locality. PhD. Thesis in range sciences – Sudan University of science and technology – Khartoum – Sudan.

- Amin, N. O. (1986). Nomadism versus sedenterization: An environmental choice in Western Sudan (The Case of Gerih elsarha). M.Sc. Thesis Institute of Environmental Studies. University of Khartoum.

- Bonham, C.D. (1989). Measurements of terrestrial vegetation. John Wiley & Sons, New York, NY. pp 11-202.

- Cordon, J. I, (2007). Plant-animal interactions in complex communities: from Mechanism to modeling, macauly land use research institute, craingiebuckler, aberdean. - Ab15 8QH.UK: inlemaire,G, Nabinger, C, Hoddgson,J and Carvalho, F.C,(2007) Grassland Ecophysiology and Grazing Ecology, CABI Head office, Nosworthy way, wallingford, Oxfordshire OX108E, UK.

- Darag, A. (1973). The impact of ranching system in the baggara country of the Western Sudan, M.Sc. Thesis. Utah State University. USA.

- Fashir, A. G. ( 2014). Impacts Assessment of Open Grazing System on Some Rangeland Environmental Components- Case Study Dilling Locality South Kordofan State- Sudan. Thesis Submitted in Fulfillment of the Requirements for the Degree of Doctor of Philosophy in Range Science. Sudan University of Science and Technology.

- Kelly, R.D. and Walker B.H. (1976). The effects of different forms of land use on the ecology of a semi-arid region in South-Eastern Zimbabwe. Journal of Ecology 64: 553- 576.

- Leopold, A. (1939). A biotic view of the land. Jour. Forestry, 37:729-730.

- Manske, L. L, (2004). Effects of Grazing Management Treatment on RangelandVegetation, North Dakota State University, Dickinson Research center, 1089 state Avenue, Dickinson, ND 58601.

- Mike P., Shaver, P., Pyke, D. A. and Herrick, J. E., (2000). Interpreting Indicators of Rangeland Health. Version 3. Technical Reference. Denver, Colorado. Pp 111.

- Ministry of agriculture, (2012), annual reports www.fao.org/.../Sudan%20Quasi%2.

- Oztas, T., Kocb, A., and Comakli, B. (2003). Changes in vegetation and soil properties along a slope on overgrazed and eroded rangelands Journal of Arid Environments 55 : 93–100.

- Parker, K. W. (1951). A method for measuring trend in range condition on national forest ranges. Administrative Studies, U. S. Department of Agriculture, Forest Service, Washington, D. C. 26 pp.

- Rodancy, H. and Jerry, W. S. (2005). Grazing Management an ecological perspective. A and M University. Texas.

- Todd S.W. and Hoffman, M.T. (1999). A fence-line contrast reveals effects of heavy grazing on plant diversity and community composition in Namaqualand, South Africa, Plant Ecology 142 (1999):169–178.

- Wlim, H.G. Costello,D.F. and Kipple,G.E,(1944), Estimating Forage by double – sampling method, J. Amer. Soc. Agron.36:194-203.


Refbacks



Copyright (c) 2015 The Journal of Agriculture and Natural Resources Sciences

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.