• 한국산학기술학회논문지
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• 제20권11호
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• pp.394-401
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• 2019

본 실험은 제한 급여에 따른 비육돈의 성장, 도체특성 및 경제성을 평가하기 위하여 수행하였다. 공시동물은 개시체중이 평균 81.52±1.11 kg인 3원 교잡종(Landrace×Yorkshire×Duroc)의 비육돈 24두를 사용하였으며, 2처리 12반복, 반복당 1두씩 완전임의 배치하여 27일간 진행하였다. 본 실험의 처리구는 무제한 급여(AF, ad libitum feeding)와 제한 급여(RF, restricted feeding)로 나누었으며, 제한 급여에서 증량이 필요한 경우 하루 전날 급여한 양의 10% 수준에서 증량하였다. 사양성적에서 RF의 일일사료섭취량이 AF에 비해 유의적으로 개선되었으나(p<0.001), 일당증체량과 사료효율은 처리구간의 유의적인 차이가 나타나지 않았다. 도체특성에서 도체중과 등지방두께는 AF와 RF간의 유의적인 차이가 나타나지 않았다. 도체등급에 따른 경제성 평가에서 두당 총 지육단가는 AF와 RF간의 유의적인 차이가 나타나지 않았다. 사료비에 따른 경제성 평가에서 RF의 총 사료섭취량과 총 사료섭취비가 유의적으로 낮게 나타났으나(p<0.001), 1 kg 증체 사료비는 AF와 RF간의 유의적인 차이가 없었다. 본 연구결과를 종합해보면 비육기 제한 급여는 무제한 급여에 비해 총 사료섭취량과 총 사료섭취비를 개선시켜 사료비를 저감시킬 수 있음을 시사한다.

• Asian-Australasian Journal of Animal Sciences
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• 제16권9호
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• pp.1339-1347
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• 2003

An experiment was conducted to investigate the effects of microbial phytase ($Natuphos^{(R)}$) supplementation in combination with carbohydrases (composed of enzymes targeted to soybean meal (SBM) dietary components such as $\alpha$-galactosides and galactomannans; $Endo-Power^{(R)}$) to corn-soybean meal based diet (CSD) and complex diet (CD) with a partial replacement of SBM with rape seed meal (RSM) and cotton seed meal (CSM) on growth performance and nutrient digestibility of growing pigs. A total of 168 growing pigs averaging $13.18{\pm}1.77kg$ of initial body weight was arranged as a $2{\times}2$ factorial design with main effects of diet types (corn-SBM based diet (CSD) and complex diets (CD; 5% of SBM was replaced with 2.5% of RSM and 2.5% of CSM in diet for phase I (0 to 3 weeks) and 6% of SBM was replaced with 3% of RSM and 3% of CSM in diet for phase II (4 to 7 weeks))) and enzyme supplementation (none and 0.1% of phytase (500 FTU/kg diet) and 0.1% of carbohydrases). The diet with enzyme application were formulated to have a 0.18% unit lower aP than diets without enzyme application. Each treatment had three replicates with 14 pigs per replicate. To determine supplementation effect of phytase and carbohydrases on ileal amino acid digestibility of SBM, RSM and CSM, a total of 18 T-cannulated pigs (initial body weight; $13.52{\pm}1.24kg$) were assigned to six dietary treatments in the present study. Dietary treatments in metabolic trial included 1) SBM diet, 2) SBM diet+with enzymes (phytase (500 FTU/kg) and carbohydrases at 0.1%, respectively), 3) CSM diet, 4) CSM diet+enzymes, 5) RSM diet and 6) RSM diet+enzymes. During whole experimental period (0 to 7 wks), there was no difference in growth performance between diets (CSD and CD). However, dietary phytase and carbohydrases supplementation significantly improved gain/feed ratio (G:F) of growing pigs. During the phase II (4-7 weeks), dietary phytase and carbohydrases supplementation significantly improved all fecal nutrient digestibilities (Dry matter (DM), gross energy (GE), crude protein (CP), crude fat (CF), calcium (Ca) and phosphorus (P)). Dietary phytase and carbohydrases supplementation improved significantly overall ileal amino acid digestibilities of SBM, RSM and CSM based diets (p<0.05). The simultaneous inclusion of phytase and carbohydrases in both of CSD and CD reduced feed cost per kg body weight gain (FCG). Also, results suggest that 2.5 to 3% of RSM and CSM, respectively, might be used as a protein source in growing pig diets without having an adverse effect on the growth performance and nutrient digestibility and simultaneous phytase and carbohydrases addition improves nutritional value of SBM, RSM and CSM by improving ileal amino acid digestibilities.