Sugarcane has a high yield potential; however, ensiling has been a challenge, and its fibre has low quality for ruminant feed. This study aimed to evaluate increasing levels of a fibrolytic enzymatic blend (300 U xylanase + 300 U cellulase/g) during sugarcane ensiling on fermentative profile, losses, chemical composition, in vitro degradation, and aerobic stability. Forty silos were assigned to four treatments: 0, 200, 400 and 600 mg enzymatic blend/kg sugarcane fresh matter. The trial was performed in a randomised blocked design, in which five sugarcane cultivars were defined as blocks. Silos were performed in 15-L PVC tubes and stored at room temperature for 45 days. Enzyme level did not affect silage pH, ammonia-N, soluble carbohydrates, ethanol, or organic acid concentration. Although increasing enzyme levels linearly increased effluent losses, there was no effect on gas losses or dry matter recovery. Treatment had no effect on silage chemical composition, in vitro degradation, or silage pH after aerobic exposure. However, enzyme treatment quadratically affected silage temperature after aerobic exposure and aerobic stability period. Intermediate levels of enzymes increased silage temperature after aerobic exposure and reduced the aerobic stability period. Therefore, addition of enzymes during sugarcane ensiling shows no effect on silage fermentation, nutritional value or dry matter recovery, but linearly increases effluent losses. Although an intermediate level of enzymes decreases aerobic stability, it has no effect on silage pH after aerobic exposure.

甘蔗具有高产潜力；然而，青贮一直是一个挑战，它的纤维对于反刍动物饲料来说质量低下。本研究旨在评估在甘蔗青贮过程中纤维分解酶混合物（300 U 木聚糖酶 + 300 U 纤维素酶/g）的水平增加对发酵曲线、损失、化学成分的影响，体外降解和有氧稳定性。四十个筒仓被分配到四种处理：0、200、400 和 600 毫克酶混合物/公斤甘蔗新鲜物质。该试验采用随机区组设计，其中五个甘蔗栽培品种被定义为区组。筒仓在 15-L PVC 管中进行，并在室温下储存 45 天。酶水平不影响青贮饲料的 pH 值、氨氮、可溶性碳水化合物、乙醇或有机酸浓度。虽然增加酶水平会线性增加流出物损失，但对气体损失或干物质回收没有影响。处理对青贮饲料的化学成分没有影响，体外有氧暴露后的降解或青贮 pH 值。然而，酶处理对有氧暴露和有氧稳定期后青贮温度的二次影响。中等水平的酶在有氧暴露后提高了青贮温度，并减少了有氧稳定期。因此，在甘蔗青贮期间添加酶对青贮发酵、营养价值或干物质回收没有影响，但会线性增加流出物损失。尽管中等水平的酶会降低有氧稳定性，但在有氧暴露后对青贮饲料的 pH 值没有影响。