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RISS 인기검색어
- 검색키워드
- 저자 : Goodband, R. D. (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Extrusion 과 Expanding 가공 기술의 비교
김인호,김춘수,Hongtrakul, K,Goodband, R . D 한국영양사료학회 1998 韓國營養飼料學會誌 Vol.22 No.4
이 보고서에 따르면 하나 또는 두 개의 스크류를 가진 사출기가 있다. 사출기의 스크류 역할을 쉽게 설명하자면 죽 상태인 물질을 다이 쪽으로 힘차게 밀어냄으로써 압력을 발생시키는 것이다. 탄수화물 공급원에 관한 사출기공기술은 애완동물 사료와 과자류에 널리 이용되어 왔다. 사출가공기술은 조직의 질과 입에서의 느낌 향상, 배합시 혼합성의 향상, 항영양소 인자의 제거 그리고 곡류에 있어 전분 젤라틴화의 정도를 증가시키는 많은 잇점이 있다. 그러나 가축성적에 있어 사출가공기술의 효과를 평가한 연구들의 결과는 다양하다. 이러한 변이는 사출기의 종류와 사출기의 조건에 따라 달라진다. 최근들어 유럽에서 채택된 익스펜더의 기술은 미국 사료회사에서 많은 관심을 보이고 있다. 그러나 사료특성과 사육성적에 관한 익스펜더의 효과를 평가한 연구는 적은 편이다. 그런 이유로 해서, 사료가공에 응용하는 정확한 사출기와 익스펜더의 조건 뿐만 아니라 가축성적의 향상을 위해 다양한 사료원료에 따른 익스펜더의 조건에 관한 더 많은 연구가 필요하리라 본다. From these reports, there are two major classifications of extruders : single or twin screw. The simple explanations of the role of the screw extruders are to generate the pressure necessary to force the dough through the die. Extrusion processing of carbohydrate sources is used widely in the pet food and snack food products. There are many benefits of extrusion processing, such as improvement of texture and mouth feel, enhancement of mixing properties, elimination of anti-nutrition factors, and increasing of degree of starch gelatinization in cereal grains. However, results from nutrition studies evaluating the effects of extruder processing on animal performance have been varied. It is likely that the wide range of extruders and extruder conditions is responsible for this variation. Expander technology, adapted from Europe, has recently received a great amount interest from U.S. feed manufacturers. However, few published reports are available which evaluate the effects of expander technology on diet characteristics and subsequent animal performance. Therefore, additional research is necessary to better define the exact extruder and expander conditions used in feed manufacturing as well as to research and define specific extruder and expander conditions for different feed ingredients to optimize animal performance.
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비육돈에 있어 사료 급이기 디자인 , 펠렛 및 계절은 성장과 물 섭취에 영향을 준다
김인호,Hancock, J. D.,Goodband, R. D.,Rantanen, M. M.,Nelssen, J. L.,Tokach, M. D. 한국동물자원과학회 2000 한국축산학회지 Vol.42 No.6
In the first experiment, 300 pigs(initial body weight 50.6㎏) were used in two 70-d growth trials(summer and winter) to determine the effects of feeder designs, pelleting and season on growth performance in finishing pigs. Three different feeder designs were evaluated; 1) a dry type, two-hole feeder(Aco™; FD1), 2) a single-hole, wet/dry shelf feeder with a nipple waterer located at the base of the trough(Crystal Spring™; FD2), and 3) an eight-hole, round, dry feeder with a wheel agitator(Osborne™; FD3). ADG during the summer trial was not affected by the feeder design. However, pigs fed from the FD2 had a slight numerical advantage in ADG. No difference was observed for ADFI during the summer trial. Pigs fed from the FD2 had approximately 5.9% better feed efficiency(P$lt;0.05) than pigs consuming feed from either of the FDI or FD3. Similar to the results from the summer trial, no differences were observed in ADG or ADFI among pigs fed from the different feeders during the winter trial. In the second experiment, 288 finishing pigs(initial body weigh of 47.4 ㎏) were used in a 35-d growth assay. Treatments were 1) dry feeder with meal diet, 2) dry feeder with pelleted diet, 3) wet/dry feeder with meal diet and 4) wet/dry feeder with pelleted diet. Feeder designs were a simple two-hole, dry feeder(Pride of the Farm™) and a single-hole, wet/dry shelf feeder with a nipple waterer located at the base of the trough(Crystal Spring™). Pigs fed from the wet/dry feeders had 4% greater ADG(P$lt;0.04) than those fed from the dry feeders. Feeder design had no effect on ADFI or gain/feed(P$gt;0.24). Pigs fed the pelleted diet consumed less feed and had better gain/feed(P$lt;0.02 and P$lt;0.01, respectively) than pigs fed the diet in meal form. However, an interaction was noted among feeder type and diet form. In dry feeders, pelleting improved efficiency of gain by 8%, but with the wet/dry feeder, pelleting improved efficiency of gain by only 1% (feeder type × diet form interaction, P$lt;0.04). Pigs consuming feed from the wet/dry feeders had 50% less water disappearance(P$lt;0.001) than pigs fed from the dry feeder. In conclusion, the single hole, wet/dry resulted in improved feed efficiency and reduced water wastage compared with the dry feeders evaluated.
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