Miniature Schnauzer에 있어서 현미 급여와 영양소 소화율 및 배설 분 특성
Nutrient Digestibilities and Fecal Characteristics of Diets Including Brown Rice for Miniature Schnauzer
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본 연구는 반려견 사료 내 주요 탄수화물원인 밀가루(원물기준 약 51%)를 현미로 15%, 30% 대체 급여하였을 때, 사료의 소화율 및 배설 분의 특성 변화를 조사하기 위하여 슈나우져(Miniature Schnauzer) 강아지(8~9개월령, 시험개시 평균체중 5.0±0.3kg) 6마리를 이용 반복 3×3 라틴방각법에 따라 실험을 수행하였다. 현미 대체에 의해 조단백질을 제외한 건물, 유기물, 산분해 지방, 에너지 소화율이 linear(P<0.01)하게 증가하였다. 사료의 가소화에너지 및 대사에너지 농도(kcal/kg DM)도 현미 대체 비율이 증가하면서 linear 하게 증가(각각 P=0.001, P=0.006)하였다. 생분 배설량과 건조 분량도 모두 linear(P<0.001, P=0.004)하게 감소하였고, 특히 현미 30% 처리구는 대조구보다 생분 배설량이 약 21% 감소하였다. 분 score 또한 linear(P<0.05) 또는 quadratic (P<0.01) 개선 효과가 있었지만, 분 암모니아 농도는 현미구에서 높은 경향(P=0.07)을 보였다. 분 암모니아 증가는 linear하게 감소(P=0.001)한 short-chain fatty acid 농도와도 관계가 있을 것으로 판단된다. 본 실험의 결과, 현미 급여가 반려견의 영양소 소화율과 배설 분의 특성을 개선해 주는 것으로 나타났다.
Abstract
The objectives of this research were to determine the effects of brown rice(BR) on food intake, digestion, energy value, and fecal characteristics. Three replacement levels which BR replaced 0, 15 and 30% of wheat flour were tested. Six female Miniature Schnauzer(8~9 month age, initial mean body weight 5.0±0.3kg) were assigned to treatments in replicated 3×3 Latin square design. Total tract digestibilities of DM, OM, acid hydrolyzed fat and gross energy except CP increased linearly(P<0.01), and observed digestible energy and metabolizable energy values also increased linearly(P=0.001 and P=0.006, respectively) with increasing BR replacement level. Wet and dry fecal output decreased linearly(P<0.001, P=0.004) with increasing BR inclusion to the diets and BR 30% treatment reduced wet fecal output up to 21% of that of control. Quadratic(P<0.01) effects was observed in fecal score for dog fed BR and fecal ammonia concentration tended to increase linearly(P=0.07) in response to increasing BR replacement level. It seems that the increase in fecal ammonia concentration may be partially related to the decrease in short- chain fatty acid concentration(P=0.001). This study clearly demonstrates that BR improves nutrients digestibility and fecal characteristics of dog.
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