Effect of Feeding Sorghum Germ Meal on Broiler Chicks Performance.

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Date
2015-06-22
Authors
Salah Khatir, Jubarah
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Publisher
UOFK
Abstract
Sorghum germ meal (SGM) samples were analyzed for proximate composition, and then fed to broiler chicks in two simultaneously conducted experiments. On average SGM contained 989.8 kg dry matter, 126 kg crude protein, 39.39 kg-1 ash, gkg-1calcium, 0.4 gkg-1 phosphorus, and 2250 mg l0 g phytic acid equivalent. In experiment one, 200 Lohmann broiler chicks were equally allocated into 20 pens, after they have been adapted on a control diet for 7 days. The four dietary treatments containing graded levels of sorghum germ meal (SGM 0, 75, 150, 225 kg) were randomly assigned to the pens (5 pens/dietary treatment). L-lysine and methionine were added to the diets to raise their contents to the recommended levels for starter broiler chicks. Feed and water were provided ad libitum throughout the six weeks experimental period. The dietary treatment had a negative linear effect (p<0.0l) on body weight, feed intake, weight gain, feed gain ratio, and dressing percentage, and a positive linear effect (p<0.01) on liver and viscera relative weights. It had insignificant effects (P>0.05) on pancreas and bursa relative weights, and on incidence of leg abnormalities and mortality rate. Abdominal fat relative weight had shown a significant negative linear effect (P<0.05). The dietary SGM caused no detectable differences in colour, juiciness, tenderness and flavour of the meat when evaluated by semi trained panelists. In experiment two, 200 seven-day-old Lohmann broiler chicks (10 chicks/pen and 5 pens/dietary treatment) were fed SGM in substitution to sorghum on iso-energetic basis. At the lowest levels of inclusion SGM replaced 0, 25, 50, and at the highest levels 75 and 100 percent of sorghum apparent metabolizable energy (AME). Increasing SGM inclusion has resulted in increasing dietary crude fibre and phytic acid content. Increasing dietary SGM levels have resulted in linear reduction in body weight (P<0.01), weight gain (P<0.05) and a decrease in feed intake. Feed: gain ratio depicted a linearly increasing (P<0.0l) response. Dressing percentage, pancreas and abdominal fat relative weights decreased linearly (P<0.0l) whereas liver and viscera relative weights depicted linear increase (P<0.0l) in response to increase in SGM. Bursa relative weight was not influenced by dietary SGM inclusion. Substitution of more than 25% of sorghum (AME) resulted in poor broiler performance.
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Keywords
Feeding ,Sorghum Germ Meal,Broiler Chicks Performance
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