本試驗旨在比較肉雞對國產與進口羽毛粉中蛋白質、能量之利用率及代謝能，並測 定其是否受雞隻年齡之影響。體重相近之60隻五日齡公雛雞，逢機分配至三處理組，每處理 四重複，每重複五隻。處理一，飼予含20%葡萄糖之基礎飼糧，處理二及三分別飼予以兩種 羽毛粉（國產與進口產品）取代葡萄糖之試驗飼糧。雞隻飼養於電熱式金屬網底育雛器內， 5至9日齡為適應期，10至13日齡及29至31日齡分別收集糞便進行代謝試驗。以指示劑法計算 肉雞對兩種羽毛粉中蛋白質、能量之利用率及代謝能，並測定其在兩種不同年齡間之差異。 另以胃蛋白?t消化試管法測定兩種羽毛粉（國產與進口產品）之蛋白質消化率，並與代謝試 驗之結果相比照。結果顯示，對10至13日齡或29至31日齡肉雞而言，年齡並不影響 （P>0.05）此兩種羽毛粉中蛋白質、能量之利用率及代謝能。進口羽毛粉比國產之羽毛粉有 較高（P<0.05）之蛋白質利用率（37.4 vs 27.9%）、能量利用率（54.7 vs 38.6%）及代謝 能（2797 vs 1889kcal/kg），在試管試驗方面，所得結果與代謝試驗所得結果相近，進口 之羽毛粉亦比國產之羽毛粉有較高（P<0.01）之蛋白質消化率（34.4 vs 25.8%）。綜合上 述結果，無論國產與進口羽毛其蛋白質、能量之利用率及代謝能均偏低。 The purpose of the study was to compare the protein utilization (PU), energy utilization (EU) and metabolizable energy (ME) of domestic feather meal (DFM) and imported feather meal (IFM) in broilers, the age effects of broilers on these measurements were also determined. Sixty five-day-old male chicks with similar body weight were randomly allotted to 4 replicates of 3 treatments with 5 chicks each replicate. Birds were fed either basal diet contained 20% glucose or were fed experimental diets which glucose was completely replaced by two sources (domestic or imported) of feather meals. Birds were housed in electrically-heated and wirefloored metabolism cages. After a 5 to 9-day adjustment period, excreta were collected at ages of 10 to 13 day and 29 to 31 day, respectively. the PU, EU and ME of two feather meals in two ages of broilers were calculated. An in vitro pepsin digestion trial was also conducted to determine the protein digestibility of two feather meals. Results indicated that the age did not affect (P>0.05)the PU, EU and ME of two feather meals. However, IFM consistently had a higher (P<0.05) PU(37.4 vs 27.9%), EU(54.7 vs 38.6%) and ME(2797 vs 1889kcal/kg) than DFM had. The protein digestibility in IFM, measured by in vitro pepsin digestion trial, was also hiher(P<0.01; 34.4 vs 25.8%) than in DFM and the values wre very similar to the values found by metabolism trial. In summary, broiler could digest more protein and energy in imported than in domestic feather meal, however, their utilization was low in both sources of feather meals.
