Abstract
This study was conducted to evaluate the effects of dietary onion supplementation on the growth rate and blood cholesterol level in finishing pigs. Sixty $Duroc\;{\times}\;Yorkshire\;{\times}\;Landrace$ pigs ($69.75{\pm}0.79kg$ average BW) were used in a 50 day growth assay. Dietary treatments included 1) corn-SBM (Con), 2) 1)+dietary onion rice bran 1.0% (ORB1), 3) 1)+dietary onion rice bran 2.0% (ORB2). For overall period, average daily weight gain and average daily feed intake were increased by the addition of dietary onion compared with Con (linear effect; p<0.01). Feed efficiency ratio was successfully improved by supplementation of dietary onion (linear effect; p<0.01). The total cholesterol concentrations in serum decreased as the concentration of onion in the diets was increased (linear effect, p<0.06). Also, LDL-cholesterol concentrations in serum tended to decrease in pigs fed onion than in those fed Con diet group (linear effect, p<0.04; quadratic effect, p<0.09). The HDL-cholesterol and triacylglyceride concentrations in serum were not influenced by the onion supplementation. The results obtained from this feeding trial suggest that the dietary onion supplementation for finishing pigs weighed 70 to 108 kg had improved growth performance and reduced total cholesterol level of serum.
본 연구는 양파의 첨가에 따른 비육돈에서의 성장 및 혈청내 cholesterol 성상에 미치는 영향을 구명하기 위해 실시하였다. 사양실험은 3원 교잡종($Durcc{\;\times\;}Yorkshire{\;\times\;}Landrace$) 비육돈 60두를 공시하였으며, 처리구로는 옥수수-대두박 기초사료에 양파 무첩가구(Con), 양파 1.0% 첨가구(ORB1)와 양파 2.0% 첨가구(ORB2)로 3 처리로 구서되었다. 전체 시험 기간동안, 일당증체량과 일당식이 섭취량은 대조구에 비해 양파의 첨가수준이 증가함에 따라 증가하였다(linear effect; p<0.01). 또한, 식이효율도 양파 첨가수준이 증가함에 따라 향상되었다(linear effect, p<0.01). 혈중 total cholesterol 농도는 대조구보다 양파 첨가수준에 따라 낮게 평가되었다(linear effect; p<0.01). 또한, 혈중 HDL-cholesterol 농도는 차이가 나타나지 않았지만, LDL-cholesterol 농도는 양파 첨가수준에 따라 유의적으로 낮은 수치를 나타내었다(linear effect, p<0.04; quadratic effect, p<0.09). 그러나 혈중 triacylglyceride 농도에서는 처리구간에 유의적인 차이가 나타나지 않았다. 결론적으로 70 ~ 108 kg 비육돈에 있어 사료내 양파의 첨가는 성장촉진과 혈중 total cholesterol 농도 감소에 효과가 있는 것으로 사료된다.
