Neustädter L-T, Kamphues J, Ratert C
Institute of Animal Nutrition, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany.
J Anim Physiol Anim Nutr (Berl). 2018 Apr;102(2):e633-e640. doi: 10.1111/jpn.12805. Epub 2017 Oct 13.
In this study, influences of a reduced macromineral intake on the trace element metabolism in horses at maintenance were investigated. Background of this study is the revised recommendation on the macromineral supply for horses (GfE ). Balance studies on three adult pony geldings with body weights of 405 / 348 / 384 kg were performed to obtain data on apparent digestibility (aD), retention and serum concentrations of different trace elements (Cu, Zn, Se) at different dietary macromineral levels. A mineral supplement or a complementary feed-with a reduced macromineral content-was added to a hay-based diet (daily 5.5 kg hay per animal, split in three servings a day), beside distilled water was offered. The diets were offered one after the other in a way that all ponies had the same sequence of treatments. The native macromineral contents of the daily offered amount of hay already surpassed the new recommendations whereas dietary trace elements needed to be supplemented. There were no statistically significant differences (p ≤ .05) concerning the aD of copper, zinc and selenium comparing the diets with and without macromineral supplementation. Serum levels of these three trace elements were not affected by the different macromineral content of the diet. Results of this study, based on a 22-day feeding period for each treatment, indicate that a macromineral supplementation of a hay-based diet for adult horses at maintenance was not necessary. However, no negative effects of added macrominerals on the trace element metabolism occurred in this study.
在本研究中，调查了维持期马匹减少常量矿物质摄入量对其微量元素代谢的影响。本研究的背景是修订后的马匹常量矿物质供应建议（德国营养学会）。对三匹体重分别为405 / 348 / 384千克的成年去势小马进行了平衡研究，以获取不同日粮常量矿物质水平下不同微量元素（铜、锌、硒）的表观消化率（aD）、保留率和血清浓度数据。在以干草为基础的日粮（每只动物每天5.5千克干草，分三次投喂）中添加矿物质补充剂或常量矿物质含量降低的补充饲料，此外还提供蒸馏水。日粮依次投喂，以使所有小马接受相同的处理顺序。每日投喂的干草中天然常量矿物质含量已经超过了新建议，而日粮中的微量元素需要补充。比较添加和不添加常量矿物质的日粮，铜、锌和硒的表观消化率没有统计学显著差异（p≤0.05）。日粮中不同的常量矿物质含量对这三种微量元素的血清水平没有影响。基于每种处理22天的饲喂期，本研究结果表明，维持期成年马匹以干草为基础的日粮中添加常量矿物质没有必要。然而，在本研究中添加常量矿物质对微量元素代谢没有负面影响。
