Abstract Effects of daily or every three days supplementation with protein or protein and starch on intake, digestion, rumen dynamics, urinary excretion characteristics, nitrogen (N) balance and, liver function of cattle fed high-quality tropical forage were evaluated. Five Nellore heifers (299 ± 7.5 kg of body weight) fitted with ruminal and abomasal cannulas were used in a 5 × 5 Latin square design. Treatments included: control; 200 g of crude protein (CP) daily; 200 g of CP and 400 g of starch daily; 600 g of CP every three days; 600 g of CP and 1,200 g of starch every three days. Supplements enhanced (P

中文翻译：

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饲喂热带牧草的牛每天或每三天补充蛋白质或蛋白质和淀粉的调查

摘要 每天或每三天补充蛋白质或蛋白质和淀粉对饲喂优质热带草料的牛的采食量、消化、瘤胃动力学、尿排泄特性、氮 (N) 平衡和肝功能的影响进行了评估。五头 Nellore 小母牛（体重 299 ± 7.5 kg）在 5 × 5 拉丁方设计中使用了瘤胃和皱胃插管。处理包括：对照；每天 200 克粗蛋白 (CP)；每天200克CP和400克淀粉；每三天 600 克 CP；每三天 600 克 CP 和 1,200 克淀粉。补充剂增强（P