FACULTY OF AGRICULTURE

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Effect of ß-mannanase supplementation and feed presentation on carcass characteristics and macro-mineral digestibility of growing rabbits fed palm kernel based diets
(Nigerian Society for Animal Production, 2012) Abu, O. A.; Tanimowo, D. A.
The influence of ß -mannanase supplementation and feed presentation of palm kernel cake (PKC, based diets were assessed on grower rabbits. Twenty crossbred grower rabbits (757.5 ± 65 g) of mixed sex aged between eight to ten weeks old were used during the trial in 2 X2 factorial design conducted in a completely randomized experimental design giving four treatment interactions with five replicates of one rabbit per replicate. The treatments were; TI- diet in mash form without enzyme; T2- diet in pellet form without enzyme; T3- diet in mash form with ß-mannanase (0.5g/kg) and T4- diet in pellet form with mannanase (0.5g/kg). The trial lasted for six weeks. The animals were weighed individually at the beginning of the study and weekly thereafter. At the end of the study period the feacal samples were collected and animals were slaughtered and measurements taken from the carcasses. The carcass yield showed no interaction, though full GIT weights (g) were significantly influenced (Tl-23.04, T2-17.67, T3-19.99 and T4- 18.74. Enzyme inclusion and feed form elicited significant effects on carcass characteristics, with varying improvements observed Enzyme inclusion on the mash diet gave lower organ weights compared to other diets. Feed form and enzyme inclusion influenced lengths of the Segments of the GTT, with rabbit on Diet 3 having the longest length. Pelleting influenced ileum lengths positively. Rabbits fed pelleted or mash diets whether supplemented or non-supplemented with ß-mannanase digested dry matter, calcium, phosphorus and magnesium in the same level. In conclusion, supplementation of diets with ß-mannanase and pelleting of diets improved phosphorus digestibility in palm kernel cake based diets. In addition, rabbits feed mash and pelleted rations with addition of ß-mannanase had improved loins as opposed to those fed mash and non-supplemented rabbits while other carcass and visceral organ characteristics were not significantly affected.
Performance, blood chemistry and serum electrolytes of broilers given water from different sources
(Animal Science Association of Nigeria, 2018) Adeyemo, G. O.; Kabir, A. O.; Tanimowo, D. A.; Ologhobo, A. D.
The role of water sources in broiler performance was assessed using 168 Abor Acre broiler birds. The birds were randomly allotted to 4 treatments (Treatment 1(T1) - tap water, Treatment 2 (T2) – bore-hole water, Treatment 3 (T3) – well water and Treatment 4 (T4) – river water), with 6 replicates each in a completely randomized design. The initial weight was measured at hatch and subsequently on weekly basis till the final week of study. Feed intake and conversion ratio were recorded and computed, while rectal temperature was obtained using a clinical thermometer inserted into the rectum of the broiler chicken. On day 42, blood was collected via the jugular vein into sample bottles for hematological and serum electrolyte assay. Data obtained were analyzed and means separated using Duncan Multiple Range Test (DMRT). Water source was observed to significantly influence rectal temperature at the 4th week, with birds served borehole water having higher rectal temperature than birds served river water. Source of water offered to the birds was also observed to influence (p<0.05) serum levels of sodium, calcium, potassium and phosphorus. Sodium level was significantly higher in birds offered river water, while borehole water resulted in significantly higher phosphorus level in broiler chicken.
Effect of water electrolyte supplementation on perfonnance, serum and haematological indices of broiler chickens under heat-stressed condition
(Animal Science Association of Nigeria, 2018) Adeyemo, G. O.; Sulaiman, A. K.; Tanimowo, D. A.; Longe, O. G.
In a study to assess the effect of electrolyte supplementation on performance of broiler chicken, 192 day- old Abor Acre broiler chicks were randomly allotted to 4 treatments: T1 - un-supplemented water, T2 - 0.5% NaCI, T3 - 0.5% KCI and T4 - 0.5% NaHCO3, with 6 replicates each in a completely randomized design. Initial weight, final weight, weight gain, feed intake were recorded and feed conversion computed. Mortality was recorded when observed. Ambient temperature and relative humidity were monitored daily. At the end of day 28, rectal temperature of each bird was recorded weekly for 3 weeks using a digital thermometer. At day 42, blood (5mls) was collected for haematological indices and plasma separated for the determination of Cl, Na, K, Ca, P, Mg, HCO3. Data obtained were analyzed and means separation determined by least significant differences (p<0.05) using the SAS Institute statistical software. Under heat stress, 0.5% KCI and 0.5%NaCI supplementation in water reduced rectal temperature, increased body weight, improved FCR, and reduced blood pH. Electrolyte supplementation also influenced red blood cell count as well as serum levels of sodium, potassium and bicarbonate. Supplementing KCI and NaCI in drinking water may be a means to improve productivity of broiler under high temperature and humidity conditions.

FACULTY OF AGRICULTURE

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