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사료내 L-carnitine , Chromium Picolinate(CrP)의 첨가 및 지방공급원의 종류가 21일령 자돈의 성장 및 영양소 소화율에 미치는 영향
김지훈,한인규,조원탁,한영근,강완병 한국축산학회 1999 한국축산학회지 Vol.41 No.4
A total of 160 weaned piglets (Landrace x Yorkshire x Duroc) that averaged 21 days of age and 5.7 kg of body weight were weaned (22±1 days of age) and housed in 1 x 2 ㎡ pens with concrete slat flooring by completely randomized block design to investigate the effects of L-carnitine, chromium picolinate with different fat sources in weaned piglets. Pigs were grouped using a 2 x 2 x 2 factorial design into a completely randomized block design with 4 replications, 5 heads per replicate. Pigs fed L-carnitine and chromium picolinate with coconut oil showed the best performance during the entire period. During 0-14 days, average daily gain showed to be affected by the supplementation of carnitine as well as chromium picolinate (p = 0.0021 and 0.0030, respectively). However, use of coconut oil (medium chain fatty acids source) did not affect average daily gain of pigs during first 2 weeks. Feed intake was not affected by the supplementation of chromium picolinate nor fat sources. However, carnitine improved the average daily feed intake of piglets during first 2 weeks (p = 0.0054). During the third week of trial, coconut oil and chromium picolinate improved the average daily gain of piglets (p = 0.0024). However, L-carnitine did not improve the average daily gain of piglets. F/G ratio also was not affected by the use of coconut oil, however chromium picolinate and carnitine improved the F/G ratio (p = 0.0004 and 0.0015 respectively). For overall period, use of coconut oil, chromium picolinate and L-carnitine improved the average daily gain (p = 0.0157, 0.0001 and 0.0059 respectively). By the increased feed intake, no difference was found in average daily feed intake and chromium picolinate and carnitine improved the F/G ratio of piglets. The best performance was found in pigs fed coconut oil, chromium picolinate and L-carnitine. Proximate nutrient digestibility was improved as the use of coconut oil and supplementation of chromium picolinate and L-carnitine. Pigs fed coconut oil with chromium picolinate and L-carnitine showed the best nutrient digestibility. Fatty acid source, chromium picolinate and L-carnitine affected nutrient digestibility during entire period. The improved ADG and F/G of pigs fed coconut oil with chromium picolinate and L-carnitine for overall period could be explained by higher digestibilities of nutrients. Use of coconut oil and/or chromium picolinate did not increase the feed price, meanwhile L-carnitine was shown to increase the feed price even in feed cost for 1,000g weight gain because of its high ingredient price and high dose as well. Thus, use of L-catnitine showed an undesirable response in feed cost analyses.