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題 名 | 卵磷脂之代謝能值及影響其促進肉雞對脂肪消化率之因子--脂肪種類及年齡=The Metabolizable Energy Value of Lecithin and Factors Affecting Its Efficacy in Improving the Digestibility of Fat in Broilers--Fat Source and Age |
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作 者 | 陳敏修; 姜樹興; | 書刊名 | 中國畜牧學會會誌 |
卷 期 | 27:4 1998.12[民87.12] |
頁 次 | 頁459-472 |
分類號 | 437.714 |
關鍵詞 | 卵磷脂; 脂肪消化率; 代謝能值; 肉雞; Lecithin; Fat digestibility; Metabolizable energy; Broiler; |
語 文 | 中文(Chinese) |
中文摘要 | 本試驗旨在探討肉雞飼糧中添加卵磷脂對改善肉雞對脂肪消化率之效果,是否 受到脂肪種類及肉雞年齡之影響;並測定卵磷脂之代謝能值。試驗一,120隻3日齡愛拔益 加雛公雞逢機分配至2(飼糧添加8%大豆油或牛脂)╳2(飼糧添加0或2%卵磷脂)複因子設 計中,每處理6重複,每重複5隻。雞隻養於電熱式金屬網底代謝籠中,於7日齡及21日齡 起分別收集糞便5日。結果顯示,大豆油之消化率較牛脂者高(P<0.0l),2l日齡肉雞對脂 肪消化率亦較7日齡者高(P<0.0l)」脂肪種類及年齡間有交互作用(P<0.0l),添加卵磷 脂改善脂肪消化率(P=0.05);而卵磷脂與脂肪種類及年齡間均無交互作用(P>0.05)。大 豆油中個別脂肪酸之消化率較牛脂中之個別脂肪酸消化率高(C16:0,Cl8:0,Cl8:2及 Cl8:3,P<0.0l;Cl8:1,P<0.05),21 日齡時之個別脂肪酸消化率亦較7日齡時高( Cl6:0,Cl8:0,Cl8:1,Cl8:2及Cl8:3,P<0.0l),卵磷脂提高C16:0及Cl8:0之消 化率(P<0.0l),而對Cl8:1,Cl8:2及Cl8:3消化率則無影響。試驗二,120隻8日齡愛 拔益加雛公雞逢機分配至4處理組,分別飼予以下四種玉米一大豆粕為主飼糧:(1)含20% 葡萄糖;(2)含15%葡萄糖及5%卵磷脂:(3)含10%葡萄糖及10%卵磷脂;(4)含20%卵磷 脂;每處理6重複,每重複5隻,雞隻飼養於電熱式金屬網底代謝籠中;於14日齡開始收集 糞便,至2l日齡結束。以指示劑法計算飼糧中所含之代謝能,以迴歸法估算卵磷脂之代謝 能值。結果測得,卵磷脂之代謝能值為6,147仟卡/公斤。綜合以上,飼糧中添加2%卵磷 脂提高肉雞對脂肪消化率之效果,不受脂肪及年齡之影響,卵磷脂之代謝能測定值為6, 147/仟卡/公斤。 |
英文摘要 | The objectives of the study were to investigate (1) whether fat source and age of chicks affect the efficacy of lecithin in improving the digestibility of fat in broilers and (2) the metabolizable energy value of lecithin. Experiment 1: one hundred and twenty 3-d old Arbor Acres male chicks were allotted to a 2X2 factorial design arrangement. Chicks were fed diets supplemented with 8% of soybean oil or tallow and 0 or 2% of lecithin. Lecithin was supplemented by replacing starch of the diets, 0.25% Cr□0□ was added in diet as an indicator. There were six replicates in each treatment with five chicks each replicate. Chicks were fed in a heated wire-floored metabolism cage; excreta were collected for 5 d each starting from age 7 and 21 d. The results indicated that the digestibility of soybean oil was higher than the digestibility of tallow (P<0.01). Elder chicks had a higher fat digestibility than younger chicks had (P< 0.01). Adding lecithin to diets improved fat digestibility (P= 0.05). There were no interaction between fat sourcexlecithin and between lecithinxage (P>0.05). The digestibility of fatty acids in soybean oil was higher than the fatty acids in tallow (C16:0, C18:0, C18:2 and C18:3, P< 0.01; C18:1, P< 0.05). Elder chicks had a higher individual fatty acid digestibility than younger chicks had (C16:0, C18:0, C18:1, C18:2 and C18:3, P< 0.01). Adding lecithin to diets could improve C16:0 and C18:0 digestibility (P<0.01), but not the digestibility of C18:1-, C18:2 and C18:3 (P> 0.05). Experiment 2: one hundred and twenty 8-d old Arbor Acres male chicks were allotted to four treatments and were fed one of four corn-SBM diets: ( 1) diet 1 containing 20% glucose; (2) diet 2 containing 1511/o glucose and 5% lecithin; (3) diet 3 containing 10% glucose and 10% lecithin; (4) diet 4 containing 20% lecithin; 0.25% Cr□0□ was added in diet as an indicator. There were six replicates in each treatment with five chicks each replicate. Chicks were fed in a heated wire-floored metabolism cage; excreta were collected from 14 to 21-d of age. The metabolizable value of lecithin was determined by extrapolating lecithin to 100% of diet according to the linear regression between the metabolizable energy of diets and the lecithin contents. The determined metabolizable energy of lecithin was 6147 kcal/kg. In summary, fat source (soybean oil vs. tallow) and age (7 vs. 21 d) did not affect the efficacy of dietary 2% lecithin in improving the fat digestibility in broilers and the metabolizable energy of lecithin was 6147 kcal/kg. |
本系統中英文摘要資訊取自各篇刊載內容。