A Feeding trial was conducted for sixteen weeks to evaluate nutrient utilization and growth performanceofcockerelsfedprocessedSennaobtusifoliamealbased-diets.Sixexperimental diets werecompounded tocontain 0%and20%eachoftheraw,boiled, soaked, sproutedand fermented Senna obtusifolia seed meal designated T1, T2, T3, T4, T5 and T6, respectively. Data were collected on nutrient digestibility, feed intake, weight gain, feed conversion ratio and mortality. Poor nutrient digestibility for crude protein (45.18%), nitrogen free extract (42.39%) and ether extract (49.22%) were recorded in the group of cockerels fed raw Senna obtusifolia seed meal based-diet. However, better nutrient digestibility for crude protein (76.23%), nitrogen free extract (67.62%) and ether extract (68.65%) digestibility was observed in the group of cockerel fed 0% Senna obtusifolia seed meal based-diet. Among the cockerels fed the processed Senna obtusifolia seed meal based-diets, those fed the fermented Senna obtusifolia seed meal based-diet showed better crude protein (75.08%), ether extract (68.65%) nitrogen free exract (67.62%) and crude fibre (32.78%) digestibility. The result of productive performance revealed a significantly (P<0.05) low total feed intake (3242.13 g), total weight gain (806.50 g) and the poorest feed conversion ratio(4.02) in the group of cockerels fed raw Senna obtusifolia seed meal based-diet. The group of cockerels fed the processed Senna obtusifolia seed meal based-diets indicated significant (P<0.05) improvement in productive performance with those fed the fermented Senna obtusifolia seed meal based-diet recording the highest total feed intake (3552.51 g), total weight gain (1079.79 g) and the best feed conversion ratio (3.29). It can be concluded that 20% of fermented Senna obtusifolia seed meal can be incorporated in the diets of cockerels without depreciationinnutrientdigestibilityandproductiveperformance.
Abstract. A feeding trial was conducted for 16 weeks to evaluate the effects and cost-benefits of feeding raw or processed Senna obtusifolia (S. obtusifolia) seed meal based-diets on the laying performance of ISA brown laying hens. Six experimental diets were compounded to contain 0% S. obtusifolia seed meal (T1) and 20% each of the raw, boiled, soaked, sprouted and fermented S. obtusifolia seed meals designated as T2, T3, T4, T5 and T6, respectively. One hundred and eighty (180) ISA brown laying hens aged 36 weeks were housed in battery cages (5 birds/0.95m2) and assigned to the six (6) dietary treatments in groups of thirty (30) birds in a completely randomized design. Each replicate cage contains 10 laying hens. Data were collected on feed intake, hen-day egg production (HDEP), hen-house egg production (HHEP), egg weight, egg mass, feed conversion ratio per egg mass, feed cost per kilogram, feed cost per egg mass and mortality. The results indicated that the group of laying hens fed raw S. obtusifolia seed meal based diet recorded the lowest HDEP (52.42%), egg weight (53.08g) and egg mass (2782.45g). Among the hens fed the processed S. obtusifolia seed meal based diets, the laying hens fed the fermented S. obtusifolia seed meal based diet indicated significantly (p<0.05) better HDEP (64.05%), egg weight (58.45g) and egg mass (3743.72g). On economic grounds, the use of raw S. obtusifolia is not cost effective because feed cost per kilogram egg was relatively high (N317.47 or $0.82) in the group of laying hens fed raw S. obtusifolia seed meal based diet. However, the processed S. obtusifolia seed meal based diets showed some economic advantage. In conclusion, 20% of fermented S. obtusifolia seed meal can be incorporated in the diets of laying hens with little or no depreciation in laying performance and economic-benefits.
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