Browsing by Author "Okoba, Peris Aumah"

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    Response of Kenyan Improved Indigenous Chicken (IIC) to Diets Composed of Serena and Kari Mtama 1 Sorghum Grain Varieties and Phytase Enzyme
    (IOSR Journal of Agriculture and Veterinary Science, 2023-09) Okoba, Peris Aumah; Nguhiu, Purity; Lucy Kabuage
    Background: Globally, scientists have shifted their attention to alternative sources of energy in feed formulation including poultry feed due to increased cost of corn attributed to reduced production and climate change. Sorghum being the fifth most important cereal in terms of production is being studied by scientists due to its ability to grow in semi-arid areas and its high productivity. Therefore, this study aimed to evaluate the effects of Serena and Kari Mtama 1 sorghum varieties on feed intake, growth performance, feed conversion efficiency and carcass characteristics of IIC. Materials and Methods: The study was carried out at the poultry unit, YMCA college of Agriculture and technology, Limuru Kenya. The study employed a completely randomized design where 10 chicks were randomly subjected to any of the diets. The diets were formulated by substituting maize with Serena and Kari Mtama 1 sorghum varieties at 0, 25, 50, and 100%. Two hundred and ten IIC chicks were studied in this project whereby each treatment was replicated 3 times. Data analysis was done using Stata version 12. Data was subjected to ANOVA to determine significant differences in performance indicators and tibia analysis among the 7 treatments. Results: The feed intake of feeds formulated using 25% white sorghum was similar to the control. Weight gain among the IIC was constant between weeks 1 to 7 while at week 8 there was a significant increase in weight gain. Chicken fed using feed formulated using white sorghum showed significantly better feed conversion efficiency (3.99- 4.66) as compared to the control (5.18). Feeds formulated using 100% white sorghum resulted to significantly high levels of zinc (19.06mg/100g) and manganese (1.13mg/100g) in the chicken bones as compared to birds fed using the control. The iron and magnesium levels in bones of chicken fed using feeds formulated using 100% white sorghum were comparable to the control. There was no differences in Calcium and phosphorus levels among birds fed using the different diet regimes.