Abstract Spent coffee grounds (SCG) represent one of the main residues derived from restoration and hostelry. The aim of this study was to evaluate the effect of SCG, included in the concentrate at different concentrations (0, 30, 50 and 100 g/kg), on milk yield and quality, feeding behaviour, dry matter intake, apparent digestibility and ruminal short chain fatty acid profile. In this trial of 51 days of duration, 48 Latxa dairy ewes were used. The ewes were blocked in quartets according to milk yield (1918 ± 287 g) and days in milk (35.7 ± 8.9 days). All of the concentrates were formulated to be isoenergetic (1.01 UFL), isoproteic (166 g/kg), isofat (76 g/kg) and to meet the production needs. The concentrate was given in two doses of 450 g of dry matter during the morning and afternoon milkings, and fescue hay was offered ad libitum. Milk production was recorded and samples were taken for fat, protein and lactose composition analysis. Dry matter intake and apparent dry matter digestibility were estimated using two markers, and feeding behaviour data was recorded. Increasing doses of SCG in the concentrate up to 100 g/kg resulted in a linear (P

中文翻译：

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将废咖啡渣用作功能性饲料成分可提高 Latxa 奶羊的生产性能

摘要 废咖啡渣 (SCG) 是修复和寄宿的主要残留物之一。本研究的目的是评估 SCG 以不同浓度（0、30、50 和 100 g/kg）包含在浓缩物中对牛奶产量和质量、饲养行为、干物质摄入量、表观消化率和瘤胃短链脂肪酸谱。在这个为期 51 天的试验中，使用了 48 头 Latxa 奶羊。根据产奶量 (1918 ± 287 g) 和产奶天数 (35.7 ± 8.9 天)，将母羊分成四组。所有浓缩物均配制成等能 (1.01 UFL)、等蛋白 (166 g/kg)、异脂 (76 g/kg) 并满足生产需求。在上午和下午的挤奶期间，以两剂 450 g 干物质的形式给予浓缩物，并随意提供羊茅干草。记录牛奶产量并采集样品进行脂肪、蛋白质和乳糖成分分析。使用两个标记估计干物质摄入量和表观干物质消化率，并记录摄食行为数据。将浓缩物中 SCG 的剂量增加到 100 g/kg 导致线性（P