University of Khartoum

Rangeland Improvement by Interseeding and Water Conservation in Semi-arid Zone of the Sudan "South Darfur, Nyala Province"

Rangeland Improvement by Interseeding and Water Conservation in Semi-arid Zone of the Sudan "South Darfur, Nyala Province"

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Title: Rangeland Improvement by Interseeding and Water Conservation in Semi-arid Zone of the Sudan "South Darfur, Nyala Province"
Author: Tahir, Abdelrahman Mohamed
Abstract: A Research was conducted over a 2-year period at Agleri (40km North East of Nyala)-Western Sudan in a semi-arid zone under rainfed conditions. The objectives were to evaluate the adaptability of introduced perennial pasture legumes and grasses to semi-arid conditions, and to assess the current status of rangelands vegetation and the effect of improved pasture on livestock performance. Four introduced perennial pasture species, namely Stylosanthes hamata, Macroptilium atropurpureum, Clitoria ternatea (legumes) and Cenchrus ciliaris (grass) were studied. Two ploughing methods viz. spring toothed cultivator and spike toothed harrow were used, grazed and ungrazed plots were evaluated. Nested in management design was used. Grazing management and ploughing methods form the main plots and pasture species formed the sub-plots, with three replicates. The plot size was 15 × 30m. Data were randomly collected on a number of attributes, for each treatment in each replicates, were used for statistical analysis. Measurements of plant density, composition, ground cover, frequency, forage yield and forage quality determination were carried out along with livestock performance. Generally, all treatments had no significant differences on soil moisture content, but there were significant differences encountered among pasture species for most characters studied; namely, plant density, % vegetative cover and survival rate, and forage yield. Stylosanthes hamata as a pure stand and as a mixture with Cenchrus ciliaris was almost outstanding in growth attributes and forage yield compared to others introduced pasture species. Vegetation measurements indicated that the plant composition and frequency were almost the same in grazed and ungrazed exclosures, the dominant annual grasses were Aristida spp., Chloris virgata and Eragrostis termula. The fewer plant species were Brachiraria xantholeuca and Brachiaria deflexa. The dominant forbs were Zornia glochidiata, Old landia senegalensis and the fewer plant species were Alysicarpus ovalifolus and Commelina spp. The dominant trees and shrubs were Boscia senegalensis, Acacia tortlis and Acacia senegal, whereas the fewer species were Combretum glutinosum and Adenium obesum. Among the introduced pasture species Stylosanthes hamata and Cenchrus ciliaris were able to compete with local plant species. The study indicated that there was no significant effect of ploughing and grazing management methods on pasture species attributes and forage yield, but spring toothed cultivator showed better results in plant growth attributes and forage yield. It was found that plant density, vegetation ground cover, survival rate ands forage yield were better in plots that plough by spring toothed cultivator than spike toothed harrow. The forage of introduced pasture species was of high quality compared to the indigenous local species. Grazing trial for both seasons showed that the improved pasture increased rams body weight in the first and the second periods and started to decline in the third period, while under traditional pastures, the ram body weight started to decline in the second and the third periods
Description: 2003146 Pages
URI: http://khartoumspace.uofk.edu/handle/123456789/10303
Date: 2015-05-05


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