Nutrient intake and apparent digestibility coefficient of lambs fed with coffee husk in replacement of oat hay

ABSTRACT: This study aimed to evaluate the effects of replacing oat hay with coffee husk in the diet of lambs on the intake and apparent digestibility of dry matter (DM), organic matter (OM), crude protein (CP), ether extract (EE), non-fiber carbohydrate (NFC), neutral detergent fiber (NDF), and acid detergent fiber (ADF). The experimental design was 4×4 Latin square with four levels of replacement of oat hay with coffee husk (0, 7.5, 15, and 22.5%) with four individually housed Texel sheep. Intake and apparent digestibility coefficients were measured at four periods of 12 days. All orts and feces were collected, weighed, homogenized, and sampled. The use of coffee husk at up to 22.5% of the total DM in the diet of lambs improved the intake of nutrients. Except for NDF, no significant differences were observed for the apparent digestibility of other parameters (DM, OM, CP, EE, NFC, and the ADF). Coffee husk can be included at up to 22.5% of total dry matter in diets with 30% roughage and 70% concentrate, being a good alternative to reduce feed costs in lamb production.

摘要：本研究旨在评估在羔羊日粮中以咖啡壳替代燕麦干草，对羔羊干物质（DM）、有机物（OM）、粗蛋白（CP）、粗脂肪（EE）、非纤维碳水化合物（NFC）、中性洗涤纤维（NDF）以及酸性洗涤纤维（ADF）的采食量与表观消化率的影响。本实验采用4×4拉丁方设计，以4只单栏饲养的特克塞尔羊为受试对象，设置4个咖啡壳替代燕麦干草的比例梯度（0、7.5%、15%和22.5%）。在4个为期12天的试验周期内，测定各指标的采食量与表观消化系数。收集所有剩料与粪便，进行称重、均质化处理并取样。在羔羊日粮总干物质占比不超过22.5%的条件下添加咖啡壳，可提升养分采食量。除中性洗涤纤维外，其余指标的表观消化率均无显著差异。在粗饲料占比30%、精饲料占比70%的日粮中，咖啡壳的添加比例最高可达总干物质的22.5%，可作为降低羔羊生产饲料成本的优质替代原料。