The Effect of Different Levels of Fish-Cassava Silage Addition in Ration on Local Duck Egg Quality
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The objective of tills experiment was to study the effect of different levels of fishcassava silage addition in ration on local duck egg quality. The experiment was con-. .ducted in Research Field of Poultry NutritionLaboratory and Poultry Product Science Laboratory, Department of Animai Production,Faculty of .Animal Science, Boger Agriculr-ure University, from July 12'" 2000 until September 10'" 2000. Ninety local duck, six month old, were used and randomly.housed into nine pens in a litter system. Each pens consist of 10 ducks. Randomly complete Design wasaplied to determine three levels of fish-cassava silage i, e.,.Rl (0% fish-cassava silage),R2 (20% fishcassava silage) and R3 (<W% fish-eassava silage) on egg mass, haUgh units score, yolk colour score and shell thickness. The results of this experiment showed that fishcassava silage did not affect on egg mass, haugh units score and shell thickness, however significantly (P<O.Ol) reduced yolk colour score. It can be concluded that fishcassava silage might be used in duck ration to substitute com and fish meal as energy and protein source. However to increase egg yolk colourthe addition of carotenoid pigment was recommended.