• Journal of Animal Science and Technology
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• 제44권2호
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• pp.213-220
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• 2002

본 연구의 목적은 생균제를 산란계에 급여하였을 때 계란품질 및 배설물내 암모니아태 질소 함량에 미치는 영향을 조사하기 위하여 실시하였다. 사양시험은 36주령 ISA brown 산란계 144수를 공시하였으며, 처리구로는 옥수수－대두박 기초 사료구(Con; basal diet), 기초 사료구에 생균제를 0.3%(PB0.3; basal diet + 0.3% probiotics)와 0.6%(PB0.6; basal diet + 0.6% probiotics) 첨가한 구로 구성되었다. 총 28일간의 사양시험 기간동안, 산란율, 난중 그리고 난각 강도에 있어서는 처리간에 차이는 있었지만 유의적인 차이를 보이지 않았다(P$>$0.05). 난각의 두께에 있어서는 PB0.6 처리구가 유의적으로 높게 평가되었다(linear effect, P$<$0.01). 난황색에 있어서는 생균제를 첨가함에 따라 대조구와 비교하여 통계적으로 높게 평가되었으며(linear effect, P$<$0.02), 난황계수에 있어서도 생균제를 첨가함에 따라 개선되는 경향을 나타내었다(linear effect, P$<$0.04). 배설물내 암모니아태 질소 함량에 있어서는 PB0.6 처리구가 다른 처리구와 비교하여 유의적으로 낮게 평가되었다(linear effect, P$<$0.04). 결론적으로, 산란계 사료내 생균제의 첨가가 난각두께, 난황색 및 난황계수를 증가시키는 것으로 사료되며, 배설물내 암모니아태 질소 함량을 감소시킴을 알 수 있었다.

• Asian-Australasian Journal of Animal Sciences
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• 제16권1호
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• pp.57-62
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• 2003

An effort was made to assess comparative production performance in broiler chickens fed diets containing solvent extracted cottonseed meal (CSM) processed from BT and Parental Non-BT lines. Processed meal of national check and commercial produce cottonseeds were also used for comparison. The free gossypol contents were 0.02, 0.02, 0.44 and 0.03% in meals of BT, Parental Non-BT, national check and commercial produce cottonseeds, respectively. Day-old broiler chicks (n=243) were divided to 27 groups of 9 each. Nine dietary treatments (iso-nitrogenous, 23% CP and iso-caloric, 2,800 kcal ME/kg) were formulated viz., D1 (control, soybean meal-SBM based), D2 and D3 (BT CSM at 10% of diet with and without additional iron), D4 and D5 (non-BT CSM with and without additional iron), D6 and D7 (national check CSM with or without additional iron), and D8 and D9 (commercial produce CSM with or without additional iron at 2 ppm for every 1 ppm of free gossypol, respectively). Each dietary treatment was offered to three replicated groups up to 6 weeks of age. At the end of 6 weeks of age, 10 birds were taken out randomly from each treatment and were sacrificed to study carcass traits, organs' yield and histo-pathological changes in vital organs. The broiler chickens received CSM processed from BT (D2, 1,753 g and D3, 1,638 g) and Parental Non-BT (D4, 1,653 g and D5, 1,687 g) with or without additional Fe grew at same rate as observed in soybean meal (solvent ext.) based diet (D1, 1,676 g). The feed intake and feed conversion efficiency (feed: gain) in these dietary treatments (BT, non-BT line based diets) also did not differ significantly (p>0.05) from control diet. Similar observation was also observed in dietary treatments (D8 and D9) containing solvent extracted cottonseed meal of commercial produce origin. However, a decrease (p<0.05) in body weight gain and feed intake was observed in D6 containing national check CSM with high gossypol content. Addition of Fe in the diet (D7) improved (p<0.05) feed intake and weight gain but not to the extent as observed in diets containing BT, parental non-BT, and commercial produce CSM or control. However, any type of CSM did not affect feed conversion efficiency when fed with or without additional iron. The carcass characteristics in terms of dressing percentage, liver weight and heart weight was not significantly (p>0.05) different between the treatments. The eviscerated yields emanated from diets containing either BT, non-BT or commercial produce were statistically similar to control. However, eviscerated yield of broilers fed national check CSM with or without iron supplementation was lower (p<0.05) than BT cotton with Fe supplementation and commercial produce CSM. The study envisaged that BT, parental non-BT and commercial produce solvent extracted cottonseed meal can be included at 10% in soybean meal based broiler diet replacing soybean meal and rice bran without additional iron.