Bochnia M, Schürer C, Gottschalk J, Einspanier A, Hillegeist D, Wensch-Dorendorf M, Greef J M, Glatter M, Zeyner A
Group Animal Nutrition, Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle/Saale, Germany.
Institute of Physiological Chemistry, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany.
J Anim Physiol Anim Nutr (Berl). 2017 Jun;101 Suppl 1:43-50. doi: 10.1111/jpn.12716.
Aim of this study was to compare glycemic and insulinemic responses and feed intake patterns in sport ponies after feeding isoenergetic quantities of low-starch muesli feed high in fat and fibre (FF) or oat grains (OG). Six sport ponies were randomly assigned to one of these two treatment groups for 2 × 3 weeks according to a crossover-design. Ponies received two equal meals/day of either semi-crushed OG (1 g starch/kg bwtmeal ) or an isoenergetic quantity of FF. Hay was also given in two equal meals/day and provided the remaining metabolisable energy up to 1.3-fold maintenance level. On day 21, blood was sampled 1 h after each pony received 0.5 kg hay (0 min). Then, the concentrate was provided and blood sampled 30, 60, 90, 120, 180, 240 and 300 min thereafter. Plasma glucose and serum insulin were analysed, and the areas under the curve (AUC) was calculated 120 and 300 min postprandial (PP). Feed intake patterns were measured in 4 ponies/group via a modified halter. OG was ingested faster than FF (feed intake time; FIT in min/kg DM: 8.8 ± 1.6 vs. 15.9 ± 1.62, p < 0.05) combined with a higher chewing frequency (p < 0.05). The AUCs were statistically higher with OG than FF (mmol/Lmin : AUC : 776 ± 128 vs. 676 ± 80.4; AUC : 1811 ± 295.3 vs. 1569 ± 126.3; nmol/L*min : AUC : 38 ± 18 vs. 22 ± 8.1; AUC : 83 ± 39 vs. 35 ± 12; p < 0.05). Plasma glucose tended to decline following the intake of FF, which might be beneficial for equines with reduced glucose tolerance. This, however, requires further investigation. In this study, the ponies consumed OG unexpectedly rapidly. The rate of feed intake was similar to the results previously reported in the literature for warmblood horses.
本研究的目的是比较运动小马在摄入等量低淀粉、高脂肪和高纤维的混合饲料（FF）或燕麦谷物（OG）后的血糖和胰岛素反应以及采食量模式。根据交叉设计，将6匹运动小马随机分为这两个处理组之一，每组进行2×3周的实验。小马每天分两顿等量进食半粉碎的OG（每千克体重每餐1克淀粉）或等量的FF。干草也每天分两顿等量提供，提供的剩余代谢能达到维持水平的1.3倍。在第21天，每匹小马在接受0.5千克干草（0分钟）后1小时采集血液样本。然后提供精饲料，并在随后的30、60、90、120、180、240和300分钟采集血液样本。分析血浆葡萄糖和血清胰岛素，并计算餐后120和300分钟的曲线下面积（AUC）。通过改良缰绳测量每组4匹小马的采食量模式。OG的摄入速度比FF快（采食量时间；每千克干物质的采食量时间（FIT），分钟：8.8±1.6对15.9±1.62，p<0.05），同时咀嚼频率更高（p<0.05）。OG的AUC在统计学上高于FF（毫摩尔/升·分钟：AUC：776±128对676±80.4；AUC：1811±295.3对1569±126.3；纳摩尔/升·分钟：AUC：38±18对22±8.1；AUC：83±39对35±12；p<小于0.05）。摄入FF后血浆葡萄糖有下降趋势，这可能对葡萄糖耐量降低的马匹有益。然而，这需要进一步研究。在本研究中，小马意外迅速地消耗了OG。采食量速度与之前文献中报道的温血马的结果相似。
