【摘要】 【目的】研究田间晾晒对饲用油菜含水率的影响，分析含水率对青贮饲用油菜营养品质、发酵品质及有氧稳定性的影响，为饲用油菜青贮实际利用提供理论基础。【方法】采用罐装青贮法，设计6个晾晒时间处理，分别为晾晒0 h（A₁处理）、12 h（A₂处理）、24 h（A₃处理）、36 h（A₄处理）、48 h（A₅处理）、60 h（A₆处理）,将晾晒后的原料直接青贮，青贮60 d后开罐，进行感官评价，分析营养品质、发酵品质和有氧稳定性。【结果】饲用油菜随晾晒时间的延长，干物质含量（DM）、铵态氮含量（NH₃-N）均显著增加（P<0.05）,pH值、乳酸含量（LA）、乙酸含量（AA）均增加不显著（P>0.05）,粗蛋白含量（CP）、粗脂肪含量（EE）、中性洗涤纤维含量（NDF）、酸性洗涤纤维含量（ADF）、可溶性碳水化合物含量（WSC）均下降；对比不同晾晒时间饲用油菜青贮发酵60 d后青贮饲料品质，晾晒12 h（含水率73.53%）蛋白质含量（CP）和可溶性碳水化合物含量（WSC）最高（分别为11.04%和12.39%）,酸性洗涤纤维含量（ADF）最低为（16.80%）,pH值显著低于其他各处理（P<0.05）,乳酸含量（LA）、乙酸含量（AA）均显著高于其他各处理（P<0.05）,丙酸含量（PA）最低（0.04%）。【结论】发酵后晾晒12 h的饲用油菜青贮营养品质、发酵品质和有氧稳定性最好，在南疆麦后饲用油菜收获时田间晾晒时间12 h左右，综合价值最优。更多还原

【Abstract】 【Objective】 This study aims to control the moisture content of Brassica napus by drying in the field, so as to clarify the influence of moisture content on the nutritional quality, fermentation quality and aerobic stability of the silage, in the hope of providing a theoretical basis for the actual utilization of silage of the feed.【Methods】 The canned silage method was adopted, and 6 drying time treatments were designed, namely drying 0 h（Treatment A₁）, 12 h（Treatment A₂）, 24 h（Treatment A₃）, 36 h（Treatment A₄）, 48 h（Treatment A₅）, 60 h（Treatment A₆）, the drying raw materials were directly silaged, and the silage time was opened after 60 d, sensory evaluation was carried out, and the nutritional quality, fermentation quality and aerobic stability were analyzed.【Results】 With the prolongation of the drying time, the dry matter content（DM） and ammonium nitrogen content（NH₃-N） of Brassica napus increased significantly（P<0.05）, the pH value, lactate content（LA）, and acetic acid content（AA） all increased, and the difference was not significant（P>0.05）, crude protein content（CP）, crude fat content（EE）, neutral washing fiber content（NDF）, acid washing fiber content（ADF）, and soluble carbohydrate content（WSC） decreased. Compared with the quality of silage after 60 days of fermentation of Brassica napus for different drying times, the protein content（CP） and soluble carbohydrate content（WSC） were the highest（11.04% and 12.39%, respectively）, the acid washing fiber content（ADF） was the lowest（16.80%）, the pH value was significantly lower than those of other treatments（P<0.05）. The lactate content（LA） and the acetic acid content（AA） was significantly higher than those of the other treatments（P<0.05）, and the propionic acid content（PA） was the lowest（0.04%）.【Conclusion】 Through comprehensive evaluation, the nutritional quality, fermentation quality and aerobic stability of Brassica napus silage dried for 12 h after fermentation are the best, showing that the drying time in the field is about 12 h when harvesting Brassica napus after wheat in southern Xinjiang, and the comprehensive value is the best.更多还原