University of Khartoum

Impact of tillage, weed control, protection and seeding With two leguminous species on rangeland improvement at western Darfur state Sudan

Impact of tillage, weed control, protection and seeding With two leguminous species on rangeland improvement at western Darfur state Sudan

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Title: Impact of tillage, weed control, protection and seeding With two leguminous species on rangeland improvement at western Darfur state Sudan
Author: Mohammed, Suliman Adam Ahmed
Abstract: Four experiments were conducted for two consecutive seasons (2005/2006 and 2006/2007) in a semi-arid Savannah zone, at the University of Zalingei perimeter, two kilometers east of Zalingei town Western Darfur State. The aim of the research was to investigate the process of rehabilitation of the deteriorated rangelands by reseeding of two leguminous species viz. clitoria (Clitoria ternatea) and siratro (Macroptilium atropurpureum) under rainfed conditions. The influence of tillage (conventional and conservation tillage), weeding (mechanical weeds control) and enclosures versus open grazing system treatments was determined. The experimental design used was spilt-plot design with three replicates, in which mechanical weed control was assigned to the sub-plot and tillage systems (conventional and zero-tillage) to the main plots. Soil moisture content was measured at different depths (0-20, 20-40 and 40-60cm.), and at different growth stages (seedling, flowering and maturity). Data were collected on plant density, percentage of plant cover, plant height, leaf to stem ratio, forage yield (fresh and dry matter production), forage quality and land equivalent ratio. Livestock performance (rams body weight gain) was also determined. Areconnaissance vegetation survey was made around the experimental area to detect the ground vegetation cover, vegetation composition and frequency in addition to biomass production. The results indicated that none of the treatments (mechanical weed control, tillage operation and the two grazing patterns) had statistically significant effect on soil moisture content, except during the flowering stage of clitoria and siratro in which conventional tillage significantly increased plant iv height. On the other hand, conventional tillage and mechanical weed control significantly increased plant density, plant height, percentage of plant cover and leaf to stem ratio of both clitoria and siratro. Moreover, they significantly increased total forage yield (fresh and dry matter production) which was coupled with high land equivalent ratio (i.e. over 1.0) and improved forage quality in terms of protein, phosphorus and fiber contents which, inturn, improved animal body weight. In addition, the plants inside the enclosure system showed better growth attributes and higher forage production (897.46 kg/ha.) with high quality, which increased animal body weight when compared with the open grazing system. Vegetation cover survey measurement showed that the area was dominated by grasses, mainly Abuasabi (Dactyloctenium aegyptium) and Ghabash (Schonefeldia gracilis), with some herbs and shrubs and few trees; Kiter (Acacia mellifera) and Haraz (Faidherbia albida). Vegetation cover was about 33-38% and biomass production was 0.679 ton/ha, which is very low to support the targeted animals in the area.
Description: 138page
URI: http://khartoumspace.uofk.edu/handle/123456789/13707
Date: 2015-06-18


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