Palmgren Karlsson C, Jansson A, Essén-Gustavsson B, Lindberg J E
Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, Uppsala.
Equine Vet J Suppl. 2002 Sep(34):44-9. doi: 10.1111/j.2042-3306.2002.tb05390.x.
The aim of this study was to investigate the effect of partly replacing oats with molassed sugar beet pulp in a traditional hay/oat diet on nutrient utilisation and metabolic parameters in exercising horses. In a change-over experiment, 4 Standardbred geldings were fed a hay and oat-based diet (Oat diet) and a hay and oat-based diet where oats was partially replaced with molassed sugar beet pulp (MSBP diet). Each experimental period was 21 days during which total collection of faeces and urine was made and an exercise test (ET) performed. The crude fat digestibility was lower on the MSBP diet (P<0.05), while there were no differences in digestibility of other nutrients and energy and in the urinary excretion of nitrogen and energy. At rest plasma insulin were lower (P<0.05) 60 and 90 min postprandially on the MSBP diet, while no differences were found in plasma glucose and insulin between the diets during the ET. The peak plasma and muscle lactate values were lower (P<0.05) on the MSBP diet and the content of muscle glycogen was higher (P<0.05) after the ET on the MSBP diet. In conclusion, the metabolic response differed between diets giving a lower lactate response and a higher glycogen content in muscle after exercise on the MSBP diet. This suggests that the dietary carbohydrate composition may influence the rate of glycogenolysis with lactate production and support the hypothesis that MSBP can replace oats in a hay based diet without impairing nutrient utilisation and metabolic response in exercising horses.
本研究的目的是调查在传统干草/燕麦日粮中用糖蜜甜菜粕部分替代燕麦对运动马匹营养物质利用率和代谢参数的影响。在一项交叉试验中，给4匹标准bred种公马饲喂以干草和燕麦为基础的日粮（燕麦日粮）以及用糖蜜甜菜粕部分替代燕麦的以干草和燕麦为基础的日粮（糖蜜甜菜粕日粮）。每个试验期为21天，在此期间收集全部粪便和尿液，并进行运动试验（ET）。糖蜜甜菜粕日粮的粗脂肪消化率较低（P<0.05），而其他营养物质和能量的消化率以及氮和能量的尿排泄量没有差异。在糖蜜甜菜粕日粮中，餐后60和90分钟时静息血浆胰岛素较低（P<0.05），而在运动试验期间，两种日粮之间的血浆葡萄糖和胰岛素没有差异。糖蜜甜菜粕日粮的血浆和肌肉乳酸峰值较低（P<0.05），运动试验后糖蜜甜菜粕日粮的肌肉糖原含量较高（P<0.05）。总之，不同日粮的代谢反应不同，糖蜜甜菜粕日粮运动后乳酸反应较低，肌肉糖原含量较高。这表明日粮碳水化合物组成可能影响糖原分解速率和乳酸生成，并支持糖蜜甜菜粕可以在以干草为基础的日粮中替代燕麦而不损害运动马匹营养物质利用率和代谢反应的假设。
