Vervuert I, Bothe C, Coenen M
Institute for Animal Nutrition, Nutrition Diseases and Dietetics, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany.
J Anim Physiol Anim Nutr (Berl). 2007 Jun;91(5-6):263-8. doi: 10.1111/j.1439-0396.2007.00703.x.
This study was conducted to evaluate the effects of different barley processing techniques on the glycaemic and insulinaemic responses in horses. It was hypothesized that the changes in pre-caecal starch digestibility caused by barley processing would affect metabolic responses. Six horses were fed in random order: whole (WB), finely ground (FGB), steamed (SB), steam-flaked (SFB) and popped barley (PB). The total barley intake was adjusted to 630 g starch/horse/day (1.2-1.5 g starch/kg BW/day). During a 10-day stabilization period, the horses also received 6 kg grass hay/horse/day. On the blood collection day, the horses were fed their test diet (exclusively barley), and blood samples were taken at defined times for glucose and insulin analysis. The degree of starch gelatinization (DG) in the untreated or thermally processed barley was analysed using the glucoamylase method. In general, barley feeding resulted in a significant increase in mean plasma glucose and insulin concentrations within 30-45 min after feeding. While the highest glucose and insulin responses occurred after intake of SFB with a DG of 28.7%, the changes in glucose and insulin were more pronounced with PB with a DG of 95.6%, with SB (DG: 22.2%), FGB (DG: 14.9%) and WB (DG: 14.9%). The peak plasma glucose varied between 5.72 +/- 0.67 mmol/l with FGB and 6.52 +/- 0.64 mmol/l with SFB (treatment p < 0.05). These results confirm the post-prandial changes in plasma glucose and insulin after intake of the different barley products, but also show that there was no association of the highest degree of gelatinization in the different barley diets with the most pronounced glycaemic or insulinaemic response.
本研究旨在评估不同大麦加工技术对马匹血糖和胰岛素反应的影响。研究假设大麦加工引起的盲肠前淀粉消化率变化会影响代谢反应。六匹马按随机顺序喂食：整粒大麦（WB）、细磨大麦（FGB）、蒸煮大麦（SB）、蒸汽压片大麦（SFB）和爆米花大麦（PB）。大麦总摄入量调整为每匹马每天630克淀粉（1.2 - 1.5克淀粉/千克体重/天）。在为期10天的稳定期内，马匹还每天每匹马接受6千克禾本科干草。在采血日，给马匹喂食试验日粮（仅大麦），并在特定时间采集血样进行葡萄糖和胰岛素分析。使用糖化酶法分析未处理或热处理大麦中的淀粉糊化程度（DG）。一般来说，喂食大麦后30 - 45分钟内，平均血浆葡萄糖和胰岛素浓度显著升高。虽然DG为28.7%的SFB摄入后出现最高的葡萄糖和胰岛素反应，但DG为95.6%的PB、DG为22.2%的SB、DG为14.9%的FGB和DG为14.9%的WB的葡萄糖和胰岛素变化更明显。FGB组的血浆葡萄糖峰值在5.72±0.67毫摩尔/升之间，SFB组为6.52±0.64毫摩尔/升（处理p<0.05）。这些结果证实了摄入不同大麦产品后餐后血浆葡萄糖和胰岛素的变化，但也表明不同大麦日粮中最高糊化程度与最明显的血糖或胰岛素反应之间没有关联。
