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首頁> 外文學位 >The role of functional properties of dietary fiber in the control of nutrient flow and intestinal health in pigs.
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The role of functional properties of dietary fiber in the control of nutrient flow and intestinal health in pigs.

機譯：膳食纖維的功能特性在控制豬營養流和腸道健康中的作用。

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摘要

Viscosity and fermentability are considered important properties of dietary fiber. Viscosity increases digesta viscosity and reduces digesta passage rate, nutrient digestion and absorption whereas fermentability increases fermentation into short chain fatty acids (SCFA). The objectives were to enhance the understanding of these properties of dietary fiber and their effects on digestive physiology using surgical models in pigs.;In study 2 and 3, ileal cannulated grower pigs were fed semi-purified diets supplemented with 5% purified non-starch polysaccharides (NSP) in a 2 (low and high viscous) x 2 (low, and high fermentable) factorial arrangement using cellulose (CEL), carboxymethylcellulose (CMC), and low and high viscous oat beta-glucan (LBG and HBG, respectively). The CMC, LBG and HBG induced high ileal digesta viscosity coinciding with high nutrient digestibility; in contrast, CEL had lowest viscosity and nutrient digestibility. The CEL, LBG and HBG increased fecal SCFA. Linear discriminate analysis of NSP and TRFLP profiles and 16S rRNA gene copy numbers of bacterial groups revealed that CMC resulted in distinctive bacterial communities. The gene copy number of butyryl-CoA CoA transferase was higher than for butyrate kinase, indicating that this pathway is dominant for butyrate production in pigs.;In study 4, similar dietary treatments were fed to catheterized pigs. High viscous and fermentable HBG increased net butyrate flux and insulin and GLP-1 production but did not affect net glucose flux.;Thus, the viscosity and fermentability are important functional properties of dietary fiber that better explained the physiological effects on kinetics of digestion, absorption, hormones responses, fermentation and thus nutrient flow and intestinal health.;In study 1, three catheterized pigs fed 3 diets containing 0, 3, or 6% oat beta-glucan concentrate (BG0, BG3, and BG6) in a repeated 3 x 3 Latin square. Pigs fed BG6 had a lower net glucose flux. Pigs fed BG6 tended to have lower portal C-peptide without lowered insulin. Pigs fed BG6 had lower portal glucose dependent insulinotropic peptide (GIP) and glucagon like peptide-1 (GLP-1), which in turn were correlated (R2 = 0.81 and 0.88, respectively) with portal glucose. Pigs fed BG3 and BG6 had a higher net SCFA flux, indicating increased fermentation.
機譯：粘度和發酵性被認為是膳食纖維的重要特性。粘度增加了消化物的粘度并降低了消化物的通過率，營養物的消化和吸收，而發酵性則增加了發酵成短鏈脂肪酸（SCFA）的能力。目的是通過手術模型增強對膳食纖維的這些特性及其對消化生理的影響的認識。；在研究2和3中，回腸插管生長豬飼喂半純飼料，并添加5％的純淀粉。使用纖維素（CEL），羧甲基纖維素（CMC）以及低粘度和高粘度燕麥β-葡聚糖（分別為LBG和HBG）以2（低粘度和高粘度）x 2（低發酵和高發酵）因子分解排列的多糖（NSP） ）。 CMC，LBG和HBG誘導的高回腸消化粘度與高養分消化率相吻合；相反，CEL具有最低的粘度和養分消化率。 CEL，LBG和HBG可增加糞便SCFA。對細菌群體的NSP和TRFLP譜圖以及16S rRNA基因拷貝數進行線性判別分析表明，CMC導致了獨特的細菌群落。丁酰輔酶A CoA轉移酶的基因拷貝數高于丁酸激酶，表明該途徑是豬丁酸生產的主要途徑。在研究4中，類似的日糧處理方法被用于導管豬。高粘度和可發酵的HBG增加了凈丁酸通量，胰島素和GLP-1的產生，但不影響凈葡萄糖通量。因此，粘度和發酵性是膳食纖維的重要功能特性，可以更好地解釋生理對消化，吸收動力學的影響，荷爾蒙反應，發酵以及養分流和腸道健康。；在研究1中，三只帶導尿管的豬重復3 x喂3種日糧，分別含0、3或6％燕麥β-葡聚糖濃縮液（BG0，BG3和BG6）。 3拉丁廣場。飼喂BG6的豬的凈葡萄糖通量較低。飼喂BG6的豬傾向于具有較低的門脈C肽而胰島素卻沒有降低。飼喂BG6的豬具有較低的門葡萄糖依賴性促胰島素肽（GIP）和胰高血糖素樣肽-1（GLP-1），它們分別與門葡萄糖相關（分別為R2 = 0.81和0.88）。飼喂BG3和BG6的豬的凈SCFA通量較高，表明發酵增加。

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  • 作者

    Hooda, Seema.;

  • 作者單位

    University of Alberta (Canada).;

  • 授予單位 University of Alberta (Canada).;
  • 學科 Agriculture Animal Culture and Nutrition.
  • 學位 Ph.D.
  • 年度 2010
  • 頁碼 261 p.
  • 總頁數 261
  • 原文格式 PDF
  • 正文語種 eng
  • 中圖分類 老年病學;
  • 關鍵詞

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