Bertone A L, Ralston S L, Stashak T S
Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins 80523.
Am J Vet Res. 1989 Sep;50(9):1628-32.
Each of 3 digestion trials (3 forage diets) was performed on 2 groups of horses 6 to 12 months after sham operation (group 1; n = 3) or large-colon resection (group 2; n = 5). Diets were alfalfa pellets, alfalfa hay, and grass hay. Feed and fecal analyses were performed to determine apparent digestion of dry matter, organic matter, and crude protein and true digestion of dry matter, organic matter, crude protein, total plant cell wall, hemicellulose, cellulose, and lignin. Additional fecal and metabolic variables determined were percentage of fecal water, total fecal water, metabolic organic matter, metabolic crude protein, and metabolic nitrogen. Large-colon resection decreased the digestion of plant cell wall because of decreased digestion of cellulose in alfalfa pellet and grass hay diets, but not in alfalfa hay diet. Insufficient digestible energy and/or protein from grass hay was obtained by horses with colon resection, and significant (P less than 0.05) weight loss was observed. Voluntary intake was significantly (P less than 0.05) increased by horses with colon resection. Of the diets studied, alfalfa hay was the most appropriate forage diet, compared with average grass hay and alfalfa pellet diet, for horses after extensive large-colon resection. Additionally, horses with colon resection may have higher levels of feed intake than do horses without colon resection.
在假手术（第1组；n = 3）或大结肠切除术后6至12个月，对两组马进行了3次消化试验（3种草料日粮）。第2组；n = 5）。日粮为苜蓿颗粒、苜蓿干草和禾本科干草。进行饲料和粪便分析，以确定干物质、有机物质和粗蛋白的表观消化率，以及干物质、有机物质、粗蛋白、总植物细胞壁、半纤维素、纤维素和木质素的真消化率。测定的其他粪便和代谢变量包括粪便水分百分比、总粪便水分、代谢有机物质、代谢粗蛋白和代谢氮。大结肠切除术降低了植物细胞壁的消化率，这是由于苜蓿颗粒和禾本科干草日粮中纤维素消化率降低所致，但苜蓿干草日粮中未出现这种情况。结肠切除的马从禾本科干草中获得的可消化能量和/或蛋白质不足，且观察到显著（P < 0.05）体重减轻。结肠切除的马的自愿采食量显著（P < 0.05）增加。在所研究的日粮中，与普通禾本科干草和苜蓿颗粒日粮相比，苜蓿干草是广泛大结肠切除术后马匹最合适的草料日粮。此外，结肠切除的马的采食量可能比未进行结肠切除的马更高。
