Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany.
Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany; Faculty of Veterinary Medicine, University of Leipzig, 04103 Leipzig, Germany.
J Equine Vet Sci. 2024 Oct;141:105152. doi: 10.1016/j.jevs.2024.105152. Epub 2024 Jul 27.
Concentrations of starch, mono- and disaccharides, fructans, hemicellulose and cellulose were analysed in feed and gastric digesta of horses in relation to acid insoluble ash as a marker indigestible in the stomach. Twenty-four horses were allocated to pasture 24 h/d (PST; n = 4), hay ad libitum (HAY; n = 8), hay ad lib. and oats at 1 g starch/kg body weight (BWT)/meal (OS1; n = 6) and hay ad lib. and oats at 2 g starch/kg BWT/meal (OS2; n = 5). One horse was excluded from the analysis. The horses were fed the ration a minimum of 34 days. Following euthanasia and dissection, digesta was sampled from Pars nonglandularis (PNG) and Pars glandularis (PG). Oat starch concentration in gastric digesta decreased from 309 to 174 g/kg dry matter (DM) in OS1 (44 %-reduction) and from 367 to 261 g/kg DM in OS2 (29 %-reduction) (P < 0.001). Glucose, fructose and sucrose disappeared from gastric digesta distinctly more in PST, HAY and OS1 than in OS2. In PST and HAY, sucrose concentration was completely cleared (P < 0.001). The concentration of fructans was reduced predominantly in PST (84 %-reduction) and HAY (54 %-reduction), mainly in the PNG (P < 0.05). Fructan degradation did not occur in the high-starch diet (OS2). Some evidence for fibre degradation was observed in PST (P < 0.01). Soluble carbohydrates disappear from the stomach dependent on the type of ration, which may lead to changes in the composition of the gastric microbial community and the endogenous response.
研究了马饲料和胃消化物中淀粉、单糖和二糖、果聚糖、半纤维素和纤维素的浓度与酸不溶灰分（作为胃中不可消化的标志物）的关系。将 24 匹马分配到每天 24 小时放牧（PST；n = 4）、自由采食干草（HAY；n = 8）、自由采食干草和每千克体重 1 克燕麦淀粉/餐（OS1；n = 6）和自由采食干草和每千克体重 2 克燕麦淀粉/餐（OS2；n = 5）。有 1 匹马被排除在分析之外。这些马至少喂食了 34 天。安乐死后解剖后，从非腺胃（PNG）和腺胃（PG）中取样消化物。在 OS1 中，胃消化物中燕麦淀粉的浓度从 309 降至 174 g/kg 干物质（DM）（减少 44%），在 OS2 中从 367 降至 261 g/kg DM（减少 29%）（P < 0.001）。葡萄糖、果糖和蔗糖在 PST、HAY 和 OS1 中从胃消化物中明显消失的速度快于 OS2。在 PST 和 HAY 中，蔗糖浓度完全消失（P < 0.001）。在 PST（减少 84%）和 HAY（减少 54%）中，主要在 PNG 中，果聚糖浓度降低（P < 0.05）。高淀粉饮食（OS2）中没有发生果聚糖降解。在 PST 中观察到一些纤维降解的证据（P < 0.01）。可溶性碳水化合物依赖于日粮的类型从胃中消失，这可能导致胃微生物群落组成和内源性反应发生变化。
