EFFECT OF HIGH LEVELS OF SUNFLOWER SEED OR MEAL IN LAYING DUCK DIETS
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The use of sunflower seed (SFS) or sunflower meal (SFM) as protein and / or energy source in laying duck diets has been carried out using Khaki Campbell Crossbred laying ducks raised in floor pens each of 2 x 5 sqm. The experiment was divided into 2 trials. In the first trial which lasted 3 months, 120 heads of 52 week-old laying ducks were divided into 4 groups, each with 3 replicates. They were fed with rations containing O, 15, 30 and 45% SFS which were equal to the substituted level for soybean meal (SBM) at 0, 31, 62 and 93% In the second trial which lasted 6 months, 180 heads of 26 week-old laying ducks were divided into 5 groups, each with 3 replicates. They were fed with rations containing 23% SFS or 10, 15, 20% SFM which were equivalent to the substitution level for SBM at 50% or 50, 75 and 100% respectively. The result revealed that egg production, feed intake and egg weight decreased significantly (P <0.05) with the increasing level of SFS. The use of SFS at 23% in young laying ducks (Exp. 2) had no adverse effect on egg production, although egg size decreased. On the other hand, the partial use or total use of SFM had no deterious effect on either egg production or egg quality.
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