In practical of silage production, variations in the fermentation parameters of silage might be attributable to changes in weather data, especially for ambient temperature. The objective of this study was to investigate how the changed temperature of outside weather condition affects distributions of pH and fermentation products in large round bale silage. The bale silages (1.22 m × 1.25 m o; density, about 168.9 kg dry matter [DM]/m³) were produced by BR6090 Combi from New Holland Agriculture, wrapped with six layers of stretch film, stored at ambient temperature (2–20°C) and constant temperature (10°C; 15°C; 25°C) for 3, 9, 15, 45 and 90 days. Compared with other silages, silage stored at 25°C had higher (p < 0.05) lactic acid content, lower (p < 0.05) pH, butyric acid content and ammonia‐nitrogen (N) ratio of total N. Fluctuant storage temperature limited lactic acid fermentation process with delayed pH decline and continuous butyric production and crude protein (CP) degradation. The differences of pH, lactic acid, propionic acid and ammonia‐N were considerably less evident in the centre of silages stored at different temperatures, and they increased towards the boundaries. The data shows that fluctuant storage temperature had undesirable effect on the fermentation quality of silage, especially for the external part of silo; relatively high and stable storage temperature for initial stage of ensiling process was necessary, but did not promote a positive response to the homogeneous distributions of pH and fermentation products in large round bale silage.

中文翻译：

---

波动的储存温度增加了大圆捆青贮饲料中 pH 值和发酵产物的不均匀分布

在青贮生产的实践中，青贮发酵参数的变化可能是由于天气数据的变化，特别是环境温度的变化。本研究的目的是调查外部天气条件的温度变化如何影响大圆捆青贮饲料中 pH 值和发酵产物的分布。青贮饲料包（1.22 m × 1.25 mo；密度，约 168.9 kg 干物质 [DM]/m³）由 New Holland Agriculture 的 BR6090 Combi 生产，用六层拉伸膜包裹，在环境温度（2-20° C) 和恒温（10°C；15°C；25°C）持续 3、9、15、45 和 90 天。与其他青贮饲料相比，25°C 储存的青贮饲料乳酸含量较高 (p < 0.05)，pH 值、丁酸含量和氨氮 (N) 占总 N 的比例较低 (p < 0.05)。波动的储存温度限制了乳酸发酵过程，具有延迟的 pH 下降和连续的丁酸生产和粗蛋白 (CP) 降解。pH值、乳酸、丙酸和氨-N的差异在不同温度下储存的青贮饲料中心显着不明显，并且它们向边界增加。数据表明，储存温度波动对青贮发酵质量有不良影响，尤其是对筒仓外部；青贮过程的初始阶段需要相对较高和稳定的储存温度，但不会促进对大圆包青贮饲料中 pH 值和发酵产物的均匀分布的积极响应。