Inclusion of Glucose Mud Meal in Broiler Ration

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Zeinab Mohamed, Tom
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Glucose Mud Meal (GMM) is a concentrated sorghum wet-milling by-product, obtained during production of starch and glucose from different varieties of sorghum grains. According to the proximate chemical analysis, GMM contained 99.40%, DM, 2.151% ash, 37.25% CP, 2.00% CF, 18.26% EE, 0.12% Ca, 0.54% P, 0.05% Mg. This study was conducted using randomized complete block design, to investigate the effects of including GMM into broiler rations, with respect to the general performance of the chicks (Trial 1). Unsexed, 200-day old Lohmann broiler chicks were randomly divided into 4 groups (50 birds/ treatment) with 5 replicates for each treatment (10 birds/ replicate). Four dietary treatments approximately iso-caloric and iso-nitrogenous) representing different levels of GMM (i.e. 0, 5, 10 and 15%) were assigned randomly to pens. The birds were offered ample, clean water and feed ad. libitum throughout the experimental period of 49 days. Parameters measured included feed intake, body weight gain, feed conversion ratio, mortality rate, leg score, tibia weight%, tibia ash%, dressing out%, abdominal fat% and liver weight%. The results obtained revealed that, feed intake, body weight gain, dressing out %, abdominal fat %, liver weight %, tibia weight %, and tibia ash %, tended to decrease significantly (P<0.01) with increasing levels of dietary GMM. Feed conversion ratio was not significantly (P>0.05) affected by the inclusion of GMM in the rations and also the mortality rate was insignificantly (P>0.5) affected. The highest leg abnormalities (leg score 1.02) was observed among the birds fed the diet containing high levels of GMM (15%) and 0.55% dietary tannin content. Higher feed intake, body weight gain, abdominal fat %, liver weight % and better feed conversion ratio were achieved by the birds fed diet B containing 5% dietary GMM and 0.48% dietary tannin. The best dressing out % was achieved by the birds fed 10% dietary GMM. The poorest general performance (feed intake, body weight gain and feed conversion ratio) was obtained by feeding the birds a diet containing a high level of GMM (15%). For further evaluation of glucose mud, a separate trial of true metabolizable energy (TME) bioassay was conducted. In this study (Trial 2), a total of 12 adult Hisex white parent stock cockerels, of 50 weeks, were housed in individual cages. Three groups of 3 birds each were force-fed with 30 grams of GMM, milled sorghum grains and sesame meal, mean while, one group was kept fasting. In trial 2, the obtained value of TME of GMM was markedly higher than that of the sorghum grains and sesame meal. Generally, the results of the two trials suggested that, the high protein content of GMM did not support the growth rate of the broiler chicks to the expected rate possibly because of the dietary tannin effect and/or unavailability of some of essential amino acid. Tannin effects can be overcome by dry-mixing of dicalcium phosphate 88) with sorghum grains. However, GMM could be considered as a source of energy for poultry.
Inclusion ,Glucose Mud Meal,Broiler Ration