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