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中國畜牧學會會誌

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篇名 飼糧中脂肪含量對肉雞腸道水解及吸收脂肪部位之影響
卷期 46增刊
並列篇名 Effect of dietary fat level on the hydrolysis and absorption of fat along the intestinal tract of broiler chickens
作者 何重志黃正耀謝宜道郭桓禎姜樹興
頁次 214-214
關鍵字 脂肪酸水解率消失量Fatty acidHydrolysis rateDisappearance
出刊日期 201712

中文摘要

本研究為探討飼糧中脂肪含量,對肉雞腸道水解及吸收脂肪部位之影響。160 隻 24 日齡 羅斯肉雞,分配至 5 處理,每處理 4 重複,每重複 8 隻,分別飼予添加 0, 2, 4, 6 及 8% 大豆油之半純化飼糧。雞隻於 35 日齡時犧牲,取出腸道,將腸道分成十二指腸(D), 空腸前(J1)、中(J2)及後(J3)段,迴腸前(I1)、中(I2)及後(I3)段,共七段, 分別收集內容物後,測定各段腸道內容物脂肪水解率、各個脂肪酸消化率及消失量。結果 顯示,大部分脂肪在D 即被水解,且不受飼糧脂肪含量之影響(P > 0.05)。脂肪酸之真消 化率,在處理×腸道片段之交互作用不顯著(P > 0.05)。總脂肪酸消失量在 D 最高,依 次為 J1 及 J2。不飽和脂肪酸於 D 消失量最高,而飽和脂肪酸消失量則於 J1 最高。綜 合以上,飼糧脂肪含量不影響脂肪在肉雞腸道中之水解及吸收部位。脂肪酸主要在十二指 腸,空腸前段及中段被吸收,而不飽和脂肪酸較飽和脂肪酸在腸道較快被吸收。

英文摘要

This study was conducted to investigate the effect of dietary fat level on the hydrolysis and absorption site of fatty acids in the intestine of broiler chickens. One hundred and sixty 24-d-old Ross chickens were allotted to 5 treatments with 4 replicates per treatment with 8 chickens per replicate and supplemented 0, 2, 4, 6 and 8% soybean oil in semi-purified diet, respectively. Chickens were sacrificed at 35-day-old and divided the intestinal tract into duodenum (D), first to third section of jejunum (J1, J2 and J3), and first to third section of ileum (I1, I2 and I3). Digesta were collected to determine the hydrolysis rate of fat, the digestibility and disappearance of each fatty acid in each intestinal section. The results showed that most of the fat was hydrolyzed at D and it was not affected by dietary fat level (P > 0.05). The interaction between the treatment and intestinal section of true digestibility of the fatty acids were not significant (P > 0.05). The disappearance of total fatty acid was occurred mainly at D1, J1 and J2. In which the disappearance of USFA and SFA occurred mainly at D and J1, respectively. In conclusion, dietary fat level did not affect the hydrolysis and absorption site of fat in the intestine. Fatty acids were absorbed mainly at D, J1 and J2, and USFA was absorbed faster than SFA was.

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