Evaluation of extruded roughage with different additives in sheep diet

The purpose was to evaluate the effect of extruded roughage Foragge® with different additives on intake, digestibility nutrients and nitrogen balance of sheep. Twenty adults, non-pregnant ewes with average weight 68 kg were used. The treatments were extruded roughage with additives (essential oil, virginiamycin, unpurified inactive yeast, tannin and purified inactive yeast). The design was in randomized blocks. The means were contrasted by SNK test, and the fecal score was tested by the Kruskal Wallis test (1952), at 5% significance. There was no difference in the intake of dry matter, crude protein, nitrogen, water, water in relation to dry matter, neutral detergent fiber (NDF), and acid detergent fiber (p > 0.05). As well as the digestibility of dry matter, crude protein and neutral detergent fiber, the fecal weight, fecal nitrogen, retained nitrogen and nitrogen retained in relation to nitrogen ingested (p > 0.05). However, dry matter intake as a function of body weight and metabolic weight, urinary nitrogen, hemicellulose intake, and hemicellulose as a function of NDF, were higher in the Foragge Factor® treatment (p < 0.05). The inclusion of different additives in the extruded roughage improved nutritional parameters, without causing disturbances.

本试验旨在评估添加不同添加剂的挤压粗饲料Foragge®对绵羊采食量、营养物质消化率及氮平衡的影响。试验选用20只体况健康、未妊娠的成年母羊，平均体重为68 kg。试验处理组为添加不同添加剂的挤压粗饲料，添加剂包括精油、维吉尼亚霉素、未纯化非活性酵母、单宁及纯化非活性酵母。试验采用随机区组设计，数据均值比较采用SNK检验，粪便评分采用1952年提出的克鲁斯卡尔-沃利斯检验，显著性水平设定为5%。结果显示，各组在干物质、粗蛋白质、氮、水分、水分与干物质比值、中性洗涤纤维（NDF）以及酸性洗涤纤维的采食量上均无显著组间差异（p > 0.05）；干物质、粗蛋白质及中性洗涤纤维的消化率，粪便重量、粪便氮含量、氮留存量以及氮留存量与摄入氮量的比值亦无显著组间差异（p > 0.05）。但以体重和代谢体重为基准的干物质采食量、尿氮含量、半纤维素采食量以及半纤维素与NDF的比值，在Foragge Factor®处理组中显著升高（p < 0.05）。在挤压粗饲料中添加不同添加剂可改善绵羊的营养相关指标，且未引发不良影响。