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Articles by R.G. Wahome
Total Records ( 3 ) for R.G. Wahome
  Koech O. Kipchirchir , Kinuthia R. Ngugi and R.G. Wahome
  This study was conducted to determine the potential of incorporating Prosopis juliflora seed pods into typical dry land livestock production systems to minimize feed scarcity during the dry seasons and avoiding weight losses and poor performance. The study evaluated supplementation of weaner Galla goats with increasing amounts of Prosopis juliflora seedpods that is widely distributed in arid and semi arid areas of Kenya. This species is drought tolerant and with high productivity of seed pods whole year round. The overall aim of this study was therefore, to assess the feasibility of incorporating P. juliflora seedpods into a typical dry land livestock production system. The study further sought to find out the optimum supplementation level for improved performance. The experiment involved 20 weaner Galla goats of similar age (6 months) and weights (11-14 kg) which were randomly assigned to four treatments of 5 weaners each. The treatments were No P. juliflora (PJP0), 100 g/goat/day P. juliflora (PJP100), 200 g/goat/day P. juliflora (PJP200), 400 g/goat/day P. juliflora (PJP400). Supplementation involved providing the goats with their respective diets in the morning before mixed species range grass hay was offered as basal diet. The animals were weighed on weekly basis and weight gains calculated as difference in previous week’s weight and current week’s weight. The experiment lasted for 70 days. Overall, all the treatment groups exhibited higher average weekly weight gains than the control group throughout the experimental period. However, for the first 3 weeks, this was not statistically significant (p<0.05). From the 5th week up to the 10th week, there was significant difference (p<0.05) in the growth rates for the treatments except for the control group. Overall, treatment PJP200 exhibited highest total weight gain (3.960c) followed by PJP400 (2.700 kg). Group PJP0 had the lowest weight gain by the end of the experiment. The supplemented groups showed good weight gains, body condition and retained nitrogen levels compared to the un-supplemented groups.
  R.K. Kyuma , R.G. Wahome , J.M. Kinama and V.O. Wasonga
  Above-ground biomass and carbon stocks of Prosopis juliflora were estimated using allometric equations in floodplains and hillslopes landscapes of the drylands of Magadi in Kajiado, Kenya. Three hundred and twenty Prosopis trees were sampled, out of which one hundred and twenty eight were randomly selected and used for the development of the allometric equations. Basal diameter, diameter at breast height, crown width and tree heights were measured; and their fresh weights taken for the development of Prosopis biomass prediction models. Cubic and power models yielded better results than linear models in biomass prediction with basal diameter being more reliable than diameter at breast height, crown width and height. Cubic curvilinear and power models for biomass prediction returned the better R2 values (0.82 and 0.98) for single and multistemmed Prosopis trees respectively. Validation of models revealed significant correlation between predicted and measured tree biomass, suggesting effectiveness of the models in biomass predictions. The dense and managed plots in the hilllslopes had the highest Prosopis biomass (44.13 tons ha–1) followed by dense and unmanaged plots (43.68 tons ha–1). The dense and unmanaged plots of the floodplains had lower estimates (34.15 tons ha–1) followed by dense and managed (28.01 tons ha–1). The moderately and sparsely dense plots in both landscapes recorded lower biomass (18.75 and 3.47 tons ha–1 in hillslopes and 12.72 and 5.09 tons ha–1 in floodplains). The effects of management were not significant in both the hillslopes and floodplains. There was growth in the Prosopis biomass trends in the dense and unmanaged Prosopis clusters but there was no change of in the moderately dense and the sparsely dense clusters during the period of study. There were insignificant differences in biomass productivity between the dense managed Prosopis plots and the dense unmanaged prosopis plots in the hillslope landscape, although, the biomass in the dense managed plots were consistently higher than in the unmanaged. In the floodplains landscape, the biomass for the dense managed Prosopis plots was consistently lower than the dense unmanaged Prosopis plots but the differences were also insignificant. Further studies were recommended with longer time frames of observations to assess the effect of management on biomass production.
  O.K. Koech , R.N. Kinuthia , R.G. Wahome and S.K. Choge
  A study was conducted to investigate the effect of increasing amounts of Prosopis juliflora seedpod meal on the growth rate of weaner Galla goats. The overall aim of this study was to assess the feasibility of incorporating Prosopis seedpods into a typical dryland livestock production system. Twenty weaner Galla goats of similar age (6 months) and weights (11-14 kg) were randomly assigned to four treatments of five weaners each. The treatments were T1 No Prosopis (control treatment), T2 (100g/goat/day Prosopis), T3 (200 g/goat/day Prosopis) and T4 (400 g/goat/day Prosopis). Prosopis contained 88.4% Dry Matter (DM), 18.5% Crude Protein (CP), 83.2% Organic Matter (OM), 51.8% Neutral Detergent Fibre (NDF), 29.8% acid detergent fibre and 5.2% Ash. The experiment lasted for 70 days. Overall, all the treatment groups exhibited higher average weekly weight gains than T1 (control) throughout the experimental period. However for the first 3 weeks these differences were not statistically significant (p<0.05). From the 5th week on wards however, the differences in growth rates were statistically significant (p<0.05). Treatment T3 exhibited highest total weight gain (3.96 kg) followed by T4 (2.70 kg). Group T1 had lowest weight by the end of the experiment. This study demonstrated that Prosopis could be used as goats feed up to 200 g/goat/day giving good weight gains and no negative effects on feed intakes and digestibility.
 
 
 
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