College of Agriculture

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Browsing College of Agriculture by Subject "Acacia tortilis pods"

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    Effects of substituting sunflower seed cake with Acacia tortilis pods as protein source in supplementary diets of Small East African goats
    (2002) Ntakwendela, L.; Mtenga, L.A.; Pereka, A.E.; Chenyambuga, S.W.; Laswai, G.H.; Kimambo, A.E.; Muhikambele, V.R.M.
    A study was undertaken to avaluate the effects of substituting sunflower seed cake with Acacia tortilis pods as a protein source in supplementing Small East African goats fed a basal diet of Brachiaria brizantha hay. Twenty-four growing female goats with mean body weight of 9. 71 = 1.56 kg were used in a growth experiment. Twelve adult bucks were used in a digestibility experiment. In the growth experiment the animals were divided into four groups, each with six animals, while for the digestibility experiment the animals were divided into four groups, each with three animals. These groups were randomly assigned to four supplementary diets containing different proportion of sunflower seed cake and Acacia tortilis pods. In treatments one (T1). two (T2); three (T3) and four (T4) sunflower seed cake was replaced with Acacia tortilis pods at levels of 0.0%, 3.33%, 66.7% and 100%, respectively. The intake of hay and total DM tended to increase with increasing levels of Acacia tortilts pods in the supplementary diet, the highest intake (430 g DM/day) was observed in goats offered supplementary diet T4. The CP intake (49.1 to 58.9g/day) did not differ significantly (P>0. 0.5). among the treatments. The intake of ME was significantly (P<0. 05) lower (3.0 MJ) for animals in T1 than those in T4 (3:7 MJ). In the digestibility trial, no significant (P>0.05) effect on apparent digestibility of DM, OM, CP and NDF on nitrogen utilisation was observed between treatments. In the growth trail, significant (P<0.05) lower growth rate was observed in animals under T1 (20g/day) than those in T3 (32g/day) and T4 (32g/day). Similarly the feed utilisation efficiency for animals in T1 (FCR=18.5) was significantly (p<0.05) lower than those of the animals in T3 (FCR=13.1) and T4 (FCR=13. 5). Replacement of sunflower seed cake with Acacia tortilis pods in the supplementary diets at the level of 66.7% and 100% gave the highest hay and total DM intake, daily live weight gain and feed utilisation efficiency. Therefore, Acacia tortilis pods may be used in place of high cost oil cakes in the feeding of goats.
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    The effect of substituting sunflower seed cake with acacia tortilis pods as a protein supplement on the performance of small East African goats
    (Sokoine University of Agriculture, 2003) Leonidas, Ntakwendela
    Two experiments (growth and digestibility) were conducted to investigate the effect of substituting sunflower seed cake (SSC) with Acacia tortilis pods (Atp) as a protein supplement on the performance of Small East African Goats. Brachiaria hay was given as a basal diet while Atp, SSC, hominy meal (HM) and mineral mixture were used as components of the supplementary rations. Four treatment rations based on ground Atp and SSC as protein supplements were formulated in such a way that ground Atp replaced 0, 33.3, 66.7 and 100 % of SSC in T|, T2, T3, and T4 respectively. In growth study, 24 female weaner goats with mean initial body weight of 9.71± 1.56 kgs were randomly allocated to the four treatment diets. Each weaner goat was given ad libitum hay and supplementary diet at a rate of 20g/kg body weight. Feed intake and growth performances were recorded for 90 days. In experiment 2, digestibility study to evaluate the effect of dietary treatments on nutrient digestibility and nitrogen utilization was conducted using 12 male goats. In growth and intake study, hay and total dry matter intake tended to increase with increasing levels of Acacia tortilis pods in the supplementary diet, goats offered supplementary diet T4 showed the highest intake. The CP intake did not differ significantly (P>0.05). The intake of ME was significantly (P<0.05) different only between Ti and T4. Significant (P<0.05) difference was observed in growth rate between the animals in Tj and those in T3 and T4. Similarly, the feed utilization efficiency for animals in Ti was significantly (P<0.05) lower than that of the animals in T3 and T4. The treatment diets had no significant (P>0.05) effect on the apparent digestibility of DM, OM, CP and NDF. There was no significant (P>0.05) difference between treatments on nitrogen utilisation, however nitrogen retention was slightly