近段十二指肠施淀粉对反刍动物小肠和全肠淀粉消化率的影响。

A Matthé, P Lebzien, I Hric, G Flachowsky, A Sommer
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引用次数: 23

摘要

4头斯洛伐克黑白公牛(LW 410 +/- 12公斤);试验1)和4头斯洛伐克黑白非泌乳奶牛(LW 475 +/- 14 kg;试验2)采用永久性瘤胃插管、十二指肠t型插管和回肠再入式插管,采用4 × 4拉丁方设计测定瘤胃后淀粉消化能力。试验1期公牛从玉米青贮中摄取5.4 kg干物质,从苜蓿干草中摄取3.6 kg干物质;试验2期奶牛仅从玉米青贮中摄取2.1 kg干物质,从苜蓿干草中摄取1.9 kg干物质。此外,750或1500克(Exp. 1)或其他。每只动物和每天给予1000或2000 g(实验2)糊化玉米或小麦淀粉作为脉冲剂量或输注到十二指肠近端。在这两个实验中,在未施用淀粉的情况下,在前期测量了十二指肠和回肠营养流动以及粪便排泄。开始施淀粉后,分别在适应9天和23天后的120 h内采集回肠食糜和粪便。Cr2O3作为流动标记物。结果表明,小肠对淀粉的利用能力有限。不同剂量的旁路淀粉的影响比不同淀粉源的影响更明显。淀粉消化率随肠道淀粉添加量的增加而降低(试验1:玉米淀粉:从74.3%降至68.0%,P < 0.001;小麦淀粉:从76.7 ~ 67.4%,P < 0.001;试验2:玉米淀粉:从71.4%到50.3%。P < 0.001;小麦淀粉:73.8% ~ 53.1%,P < 0.001)。在试验1和试验2中,玉米淀粉消化率分别比小麦淀粉低0.6 ~ 2.4% (P < 0.05)和2.4 ~ 2.8% (P < 0.001)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of starch application into the proximal duodenum of ruminants on starch digestibility in the small and total intestine.

Four Slovakian Black-and-white bulls (LW 410 +/- 12 kg; Exp. 1) and four Slovakian Black-and-white non lactating dairy cows (LW 475 +/- 14 kg; Exp. 2) with permanent ruminal cannulas, duodenal T-cannulas and ileal re-entrant cannulas were used in a 4 x 4 Latin square design to determine the postruminal capacity of starch digestion. In Exp. 1 bulls received 5.4 kg DM from corn silage and 3.6 kg DM from alfalfa hay, in Exp. 2 cows consumed only 2.1 kg DM corn silage and 1.9 kg DM alfalfa hay. Additionally, either 750 or 1500 g (Exp. 1) or resp. 1000 or 2000 g (Exp. 2) gelatinized corn or wheat starch per animal and day were applied as pulse doses or as infusion into the proximal duodenum. In both experiments the duodenal and ileal nutrient flow, as well as the faecal excretion without starch application, were measured in a pre-period. After starting starch application ileal digesta and faeces were sampled over 120 h after 9 or 23 days of adaptation respectively. Cr2O3 was used as a flow marker. It was shown, that the capacity of starch utilisation in the small intestine was limited. The effect of different doses of bypass-starch was more pronounced than the effect of different starch sources. Starch digestibility decreased with increasing amounts of starch in the intestine (Exp. 1: corn starch: from 74.3 to 68.0%, P < 0.001; wheat starch: from 76.7 to 67.4%, P < 0.001; Exp. 2: corn starch: from 71.4 to 50.3%. P < 0.001; wheat starch: from 73.8 to 53.1%, P < 0.001). Corn starch was 0.6 to 2.4% units (P < 0.05) and 2.4 to 2.8% units (P < 0.001) less digested than wheat starch in Exp. 1 and Exp. 2, respectively.

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