The three pre-ensiling treatments dry matter (DM) concentration, wilting intensity and sucrose addition have recently been shown to affect the chemical composition of lucerne (Medicago sativa L.) silages (LS) with highest true protein preservation and improved fermentation quality when lucerne was wilted with high intensity to 35% DM concentration and ensiled with the addition of sucrose. Provided that ruminants prefer these LS to those produced under other pre-ensiling conditions, an improved provision of dietary energy and nutrients may be achieved. However, information on how such pre-ensiling treatments influence the feed choice and DM intake (DMI) of ruminants is lacking and thus, feed choice trials with ten Saanen-type wethers were conducted. The LS were tested in two separate trials split by the factor sucrose addition. In both trials, the animals first passed an adaptation period receiving each differently pre-treated LS (n = 4) and lucerne hay that served as a control for one day to gain forage-specific post-ingestive responses. Subsequently, each possible two-way combination of forages was offered to the animals to determine the forage preference, i.e. 30-min and 3-h DMI. The DM concentration affected the feed intakes at both time points with greater preference for 35% DM LS than for 25% DM LS and a higher consumption was observed for sucrose-treated LS than for untreated LS when related to control lucerne hay. In contrast, wilting intensity showed no influence on DMI. The higher intake of high DM or sucrose-treated LS was likely related to the superior silage quality as indicated by high negative correlations of DMI and non-protein nitrogen, ammonia-nitrogen, acetic acid, butyric acid and gamma-aminobutyric acid concentrations.

最近表明，青贮前的三种处理干物质 (DM) 浓度、萎蔫强度和蔗糖添加会影响苜蓿 ( Medicago sativa)的化学成分。L.) 青贮饲料 (LS)，当苜蓿以高强度枯萎至 35% DM 浓度并通过添加蔗糖青贮时，具有最高的真实蛋白质保存和改进的发酵质量。如果反刍动物更喜欢这些 LS 而不是在其他青贮前条件下生产的那些，则可以改善日粮能量和营养素的供应。然而，缺乏关于此类预青贮处理如何影响反刍动物的饲料选择和干物质摄入量 (DMI) 的信息，因此，对十种 Saanen 型天气进行了饲料选择试验。在两个单独的试验中对 LS 进行了测试，这些试验被因子蔗糖添加分开。在这两项试验中，动物首先通过了一个适应期，接受每种不同的预处理 LS ( n = 4) 和用作对照的苜蓿干草，用于获得特定于饲草的摄食后反应。随后，将每种可能的两种饲料组合提供给动物以确定饲料偏好，即 30 分钟和 3 小时 DMI。DM 浓度影响两个时间点的采食量，对 35% DM LS 的偏好大于 25% DM LS，当与对照苜蓿干草相关时，观察到蔗糖处理的 LS 比未处理的 LS 消耗量更高。相反，萎蔫强度对DMI没有影响。高 DM 或蔗糖处理 LS 的较高摄入量可能与优良的青贮质量有关，如 DMI 和非蛋白氮、氨氮、乙酸、丁酸和 γ-氨基丁酸浓度的高度负相关所示。