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ARPN Journal of Science and Technology >> Volume 7, Issue 1, January 2017

ARPN Journal of Science and Technology


Assessment of Rangelands in Semi Arid Areas of Sudan - South Kordofan State (Eldebeibat Area)

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Author Abdelrahim Omer Abdelrahim ,Nancy Ibrahim Abdalla
ISSN 2225-7217
On Pages 117-124
Volume No. 5
Issue No. 2
Issue Date March 01, 2015
Publishing Date March 01, 2015
Keywords Semiarid areas, Natural rangeland, plant compositions, Plant cover, Biomass production, Plant density



Abstract

Rangelands are basically one of the main feed resources for livestock. Therefore, it's necessary to be known rangelands existing situation for their improvement and management. Vegetation measurement was conducted on the rangelands of South Kordofan at Eldebeibat area in two periods 2008 and 2012. Sampling for herbaceous cover was based on locating twenty transects 100 m. Length each along the main road in the whole study area which linked with Elobeid and Edalang locality. The herbaceous assessments included cover, composition, density and biomass. The equipments used for data collection were Loop, 1 m2 quadrate, compass, and 100-m. Tape. Within the two quadrates 10 X 20 m., trees and shrubs density was determined using the direct count method. The results of the present study showed that overgrazing was considered as the major factor responsible for the low vegetation cover in the study area due to the concentration of high numbers of animals during the rainy season. The result indicated that continuous intense grazing causing vegetation changes such as the replacement of palatable grasses by less palatable plant species. The most dominant herbaceous species in the area were Zornia glochidiata and Sida cordofolia both are less preferred by animals, indicating intensive selective grazing and hence disturbance in rangeland. Results showed that there was considerable variation in tree density in two periods. Human activities and heavy browsing are the main factors influencing the distribution of tree cover and can also affect the woody species density. The albizzia amara and Guiera senegalensis are the most dominant tree species in the area and it is less preferred by animals. Sound management and suitable improvement techniques should be implemented for these rangelands.


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