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RISS 인기검색어
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- 저자 : Leeson (검색결과 3 건)
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The Effect of Broadcasting Sow Suckling Grunts in the Lactation Shed on Piglet Growth
Cronin, G.M.,Leeson, E.,Cronin, J.G.,Barnett, J.L. Asian Australasian Association of Animal Productio 2001 Animal Bioscience Vol.14 No.7
An on-farm trial was conducted in temperature-controlled lactation rooms at a commercial pig farm to investigate the efficacy of broadcasting sow suckling grunts from day 4 of lactation, on increasing piglet growth to weaning. In the Broadcast treatment, sows and litters were exposed to a 3-min broadcast from loud-speakers every 42 min. The Control treatment was not exposed to the broadcast. All sows and litters had similar husbandry and piglets were provided with creep feed on the floor twice daily. In each of the three replicates in time, the Broadcast and Control treatments were allocated to different lactation rooms at random and there were 12 sows and litters per treatment per replicate. A total of four identical lactation rooms were available for the trial, each containing 28 conventional sow and litter crates with piglet heater in the creep area. A non-trial room separated the two treatment rooms in each replicate to minimise the chance that the broadcast grunt stimulation was audible to the Control treatment litters. Five "normal and average-looking" piglets from the trial litters were weighed twice, 7 d apart. The cohort of five piglets was identified by ear-tags and formed the experimental unit for the statistical analysis. The average (${\pm}SD$) age of piglets at initial weighing was 7.7(${\pm}2.22$) days. For each litter, mean piglet live weight at day 14 of lactation was estimated by linear regression of the two weights recorded seven days apart, when on average, the Broadcast treatment had been exposed to the stimulation for 10 days. Piglets in the Broadcast treatment were heavier (p<0.01) at day 14 of lactation compared to Control treatment (4.24 and 3.92 kg, respectively) and tended to have a greater average daily weight gain over the 7-d period (245 and 228 g/day, respectively; p<0.08). The results suggest piglet growth was improved by about 8% in response to the regular, timed broadcast of sow suckling grunts in the lactation shed. The independent contributions of milk and creep feed to the improved growth remain to be determined.
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Effect of Antioxidants and Oxidized Fat on the Performance of Broiler Chicks
남궁환(H. Namkung),스티브 리슨(S. Leeson),백인기(I. K. Paik) 한국가금학회 2000 한국가금학회 정기총회 및 학술발표회 Vol.17 No.-
본시험은 산패지방을 사용시 항생화제 (Santoquin^®와 Oxiban^®)의 첨가가 육계의 생산성에 미치는 영향을 측정하기 위하여 실시하였다. 신선한 또는 산패된 지방 (실험 1, 4, 5에서는 동물성, 식물성 혼합지방, 실험 2, 3에서는 옥수수기름)을 함유한 사료에 실험 1과 2에서는 0, 250, 500 ppm, 실험 3에서는 0, 100, 200, 300, 400, 500 ppm의 Santoquin^®을 실험 4에서는 0, 400, 800 ppm, 실험 5에서는 0.1% lipase + 400 ppm의 Oxiban^®을 첨가 또는 미첨가하여1일령의 육계에 급여하였다. 모든 실험에서 산패한 지방을 급여한 병아리보다 신선한 지방을 급여한 병아리의 증체량이 높았고, 실험 1과 2에서는 사료효율이 개선되었으며 AMEn과 지방소화율이 높았다. 병아리의 생산성에 대한 항산화제와 지방공급원간의 상호작용은 없었다. 실험2에서 200 ppm이상의 Santoquin^®을 급여시 증체량과 사료섭취량이 감소 하였다 (P < 0.05). 실험 2와 5에서 산패지방을 급여한 병아리의 간의 malondialdehyde (MDA )함량이 높았다 (P < 0.05). 실험 2에서 산패지방에 Santoquin^® 250 ppm을 첨가한 구의 병아리의 간내 MDA함량이 낮았지만 실험 1, 4, 5에서는 처리간에 차이가 없었다. 결론적으로 항산화제의 첨가시 산패지방 급여에 의한 악영향을 왕화시킬 수 있으며, 사료내 Santoquin^®을200 ppm이상 첨가시 생산성 저하를 나타내는 것으로 보인다. Five experiments were conducted to investigate the effects of antioxidants (Santoquin^® and Oxiban^®) using fresh or oxidized fat on the performance of broiler chicks. Day-old broiler chicks (except for Experiment 5 in which 6-d-old birds were given experimental diets for 10 d) were fed diets containing fresh or oxidized fat (animal-vegetable fat blend in Experiments 1, 4, and 5 and corn oil in Experiments 2 and 3) with or without graded concentrations of Santoquin^® (0, 250, 500 ppm in Experiments 1 and 2 and 0, 100, 200, 300, 400, 500 ppm in Experiment 3) or of Oxiban^® (0, 400, 800 ppm in Experiment 4 and 400 ppm with 0.1% lipase in Experiment 5) of 2 wk. In all experiments, birds fed fresh fat gained more weight, had better feed/gain, together with higher AMEn and apparent fat digestibility (Experiments 1 and 2) than birds fed oxidized fat (P < 0.05). There was no interaction among fat sources and antioxidants on the performance of chicks in any experiment. In Experiment 3, Santoquin^® more than 200 ppm resulted in a reduction in weight gain and feed intake (P < 0.05). The livers of chicks fed oxidized fat in Experiments 2 and 5 had higher malondialdehyde (MDA) values (P < 0.05). Chicks fed oxidized fat with 250 ppm Santoquin^® in Experiment 2 had lower liver MDA values, although this situation did not occur in Experiments 1, 4, and 5. These results indicate that antioxidant supplements can alleviate most deleterious effects of feeding oxidized fat and that supplementation of Santoquin^® more than 200 ppm has a negative effect on the performance of broiler chicks.
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