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Email this article Effect of Climate Change on Seasonality of Animal Feeds on Rangeland Productivity at Selected Sites of Khartoum State
Abstract
The impact of climate change on seasonality of rangeland productivity in Eastern Nile and Northwestern Omdurman was monitored during two successive years (2011 and 2012). Seven sites selected were within Khartoum state. Parameters investigated were range condition, nutritional value of plants, carrying capacity and plant palatability. The results showed that the contribution of different plant species to small ruminants (sheep & goats) and camels’ diet as a percentage of pollens’ plants measured in feces showed that Grass spp constituted more than 90% of all animals’ diet except for two sites. Palatability of plant species as rated high, moderate, less and not palatable according to inhabitants’ observation showed different preferences for different plant species. Woody species most preferred by sheep was L. pyrotechnica. In addition goats’ most palatable woody species were: A. ehrenbergiana, A. spirocarp. Camel's most palatable woody species were: A. ehrenbergiana, A. spirocarpa. Pasture Condition Scoring (PCS) and Evaluation Site Methods (RESM) for both years showed better range condition in 2012 than 2011. Nutrient contents and digestible protein (%) of the main grasses, forbs and woody species for the different site at both middle and rainy season showed that; for grasses and CF showed the highest contents whereas, P. turgidum and C. rotundus showed higher ME. For forbs, S. sesban and E. aegyptiaca showed the highest digestible proteins. All woody vegetations species showed high CP contents and higher digestible proteins. Metabolism energy was better for Tundub and Abu Seweid on the Blue Nile site, whereas digestible protein tends to increase for the sites on the White Nile sites. Mineral contents and organic carbon measurements for the different species at different sites showed better calcium contents for plant cover at Tundub and Medaisees, whereas both potassium and phosphorous levels were better in the plant cover at Medaisees.
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