Effekte verschiedener Futtermittel und -bearbeitungsformen auf die postprandiale Glucose- und Insulinreaktion sowie auf die Wasserstoff- und Methanexhalation beim Pferd

摘要: This study researches the influence of various feeds containing starch and crude fiber on the glucose homoeostasis hydrogen- and  methane exhalation in horses. For this purpose origin (oats, barley, mixed feeds), forms of processing (mechanical, thermal, enzymatical) along with amount added (0.3-0.4 starch/kg BW) roughage (hay, sugar beet pulp, chaffed alfalfa-straw mix) feed combinations out alfalfa oats glucose- insulin response and methane was examined. The serves as an indirect marker for enzymatical decomposition serving an microbiological fermentation processes. Four horses (three trotters, one warmblood; ages between 10 11 years; body weight (BW): 563±46.9 kg, BCS 5-6) were used test. 28 feed variations were given block by block, a cross over design or randomized horses examined postprandially regards to their glycaemic insulinaemic responses well hydrogen exhalation. grains fed concentration 2g/kg BW, oats addition at 4 g BW. Commercially (MF) offered increasing concentrations (0.3-2 BW). In addition, had free access roughage pulp that 1 kg dry matter. Oats (2 g varying sequences (0.5 crude fiber/kg Additionally, received hay three times day. After period adaptation from two eleven days twelve hours abstention received exclusively respective be Blood samples examination probes hydrogen- taken in preset intervals. highest insulin observed after feeding oat not resulting any noticeable changes (treatment p<0.05). Whole rolled barley resulted similar (glucose peak: oats: 6.70 ± 0.33 mmol/l, barley: 6.64 0.34 p>0.05, 55.6 19.8 µU/ml, 39.1 9.10 p>0.05). thermical treatment significantly increased concentrations serum (AUC glucose: barley: 275 73.8, micronised 490 114, extruded 731 extruded enzyme: 771 95.1, treatment p<0.05; AUC insulin: 7031 4562, micronised 17993 6573, 24391 1571, with 38270 12678, p<0.05). Also, thermal barley significant reduction comparison to untreated feeding thermally processed MF higher reactions could be than oats, even when amounts identical However, was reduced (p<0.05). When it became obvious results easy reproduce, so is difficult assess effect glycamic response. response quite dependent starch, up feed, mechanical grain, respectively. At same time moderating most likely overestimated. Independent specific variation given, demonstrated clear individual differences Besides enzymatic there elevated microbic conversions already small intestine especially different which can clearly modified through grain.