The aim of this study was to examine the effects of including palm kernel cake (0, 120, 240 or 360 g/kg) in high-concentrate diets for feedlot goats on digestibility, nitrogen metabolism, ingestive behavior and performance. Thirty-two non-pregnant, mixed-breed goats (average age: 1 year; initial body weight: 24.70 ± 3.72 kg) were evaluated in a completely randomized experimental design. The intake of nutritional fractions responded quadratically (P<0.05) to dietary inclusion of palm kernel cake, whereas the digestibility coefficients of dry matter (P=0.010) and organic matter (P=0.006) decreased. Fecal (P<0.001) and urinary (P=0.005) excretions of nitrogen also decreased. Plasma gamma glutamyl transferase concentrations decreased (P=0.017), whereas a quadratic response was observed for the serum concentrations of alanine aminotransferase (P=0.017) and aspartate aminotransferase (P=0.003). Daily weight gain also responded quadratically (P=0.013), with maximum gain estimated at the palm kernel cake inclusion level of 107.7 g/kg. Palm kernel cake inclusion levels of up to 107.7 g/kg are recommended for high-concentrate diets for feedlot goats, as they improve production performance and do not compromise metabolic or behavior parameters.

这项研究的目的是检验高浓度日粮中饲育山羊的棕榈仁饼（0、120、240或360 g / kg）对消化率，氮代谢，摄食行为和生产性能的影响。在完全随机的实验设计中评估了32只非妊娠混合山羊（平均年龄：1岁；初始体重：24.70±3.72 kg）。营养级分的摄入对棕榈仁饼的日粮添加呈二次响应（P < 0.05），而干物质（P = 0.010）和有机物（P = 0.006）的消化率降低。粪便（P < 0.001）和尿（P =0.005）氮的排泄也减少。血浆γ-谷氨酰转移酶浓度降低（P = 0.017），而血清丙氨酸转氨酶（P = 0.017）和天冬氨酸转氨酶（P = 0.003）的浓度呈二次响应。每日体重增加也呈二次响应（P = 0.013），在棕榈仁饼夹杂物含量为107.7 g / kg时估计最大增重。对于高浓度饲喂山羊的日粮，建议棕榈仁饼的添加量最高为107.7 g / kg，因为它们可以提高生产性能并且不影响代谢或行为参数。