가축별 대사시험 및 소화시험 표준방법 설정을 위한 연구 3 . 면양에 대한 사료급여방법 , 전분채취법과 간접방법이 소화율 및 에너지이용율에 미치는 영향 = Studies to Establish the Standard Metabolizability or Digestibility Experiment Method for Various Livestocks 3 . Effects of single and mixed feeding method or total collection method and indirect method on digestibility of nutrients and energ

다국어 초록 (Multilingual Abstract)

This experiment was conducted to compare the single feeding method with the mixed feeding method or total collection method with indirect method by chromic oxide in evaluating the feed for lambs. For digestion trial, 12 lambs weighing approximately 50 to 60 ㎏ were divided into 4 groups. i.e., corn l00% group, corn 70% + soybean meal 30% group, corn 30% + soybean meal 70% group, soybean meal 100% group. In respective group, hay was supplied for roughage. To determine the digestibility of nutrients and energy utilizability by feeding method or total collection and indirect method, digestion trial was conducted for 14 days. i.e., preliminary periods 9 days and collection periods 5 days. The results obtained were summarized ;is follows. 1. There was not the constant trend in amount of urine. But in amount of feces, single feeding method groups were more than mixed feeding method. In amount of feces, soybean meal 100% group was the highest (2024.2g/5 days) and corn 100% group was the lowest (1834.0g/5 days). In chemical composition of feces, single feeding method group was lower than mixed feeding method group. But there were not the constant trend in chemical composition of urine. 2. Single feeding group was higher than the mixed feeding group in percent of excretion. Recovery rate of chromium was the reverse tendency to percent of excretion (average 96.13%). 3. In proportion to increase the soybean meal level, digestibility of crude protein was increased but that of carbohydrate was decreased. In crude fat and dry matter digestibility, there were not the. constant tendency. 4. Total collection or indirect method by chromic oxide ,might be used. But digestibilities by indirect method were lower than those by total collection method. It was caused to recovery of chromium. 5. Average DCP, TDN and DE of corn were 5.24%, 72.07% and 3105 ㎉/㎏. Those of soybean meal were 36.64%, 69.91% and 3160 ㎉/㎏.