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Rebaling of silage and haylage and its effects on forage microbial and chemical composition—A pilot study
Grass and Forage Science ( IF 2.4 ) Pub Date : 2020-04-22 , DOI: 10.1111/gfs.12480
Cecilia E. Müller 1 , Astrid Johansen 2
Affiliation  

Use of big bale silage and haylage can be difficult on farms where daily forage consumption is comparatively low as speed of deterioration of forage after bale opening may be faster than feed-out rate. Production of smaller bales at harvest is possible, but expensive and work-intensive. Therefore, a pilot study of rebaling forage stored in big bales to smaller bales was conducted. Three separate experiments were included, where microbial and chemical composition of silage and haylage was studied before and after rebaling. In Experiment III, residual big bale forage stored and opened together with rebaled forage was included. Results showed that rebaled haylage and silage had higher yeast counts compared to initial forage; however, residual bales in Experiment III had yeast counts similar to rebaled forage, indicating an effect of storage time rather than of rebaling. In Experiment II, mould counts were higher in rebaled compared to initial silage, but not in haylage. Chemical composition was similar in initial and rebaled forage except for ammonia-N. In Experiment III, ammonia-N was higher in rebaled compared to initial and residual forage and was the only chemical variable affected by rebaling. Bale temperature during aerobic storage followed ambient temperature until day 6-8 in Experiment I and until day 14 in Experiment III where ambient temperature was lower. In conclusion, rebaling can be done without large changes in chemical composition of the forage, but yeast and mould counts may be higher in rebaled forage, and this risk should be considered when using this procedure.

中文翻译:

青贮和干草的再平衡及其对牧草微生物和化学成分的影响——一项初步研究

在每日草料消耗量相对较低的农场,使用大包青贮饲料和干草可能很困难,因为打开草包后草料的变质速度可能快于进料速度。在收获时生产较小的棉包是可能的,但成本高且工作量大。因此,进行了将储存在大包中的草料重新打包成小包的试点研究。包括三个独立的实验,其中研究了重新打包前后青贮饲料和干草的微生物和化学成分。在实验三中,将剩余的大捆草料与重新打包的草料一起储存和打开。结果表明,与初始草料相比,重新打包的干草和青贮饲料具有更高的酵母计数;然而,实验 III 中残留的草包的酵母计数与重新打包的草料相似,表明存储时间的影响而不是重新打包。在实验 II 中,与初始青贮饲料相比,重新打包的霉菌数量更高,但干草中的霉菌数量没有。除了氨氮外,初始和重新打包的草料的化学成分相似。在实验 III 中,与初始和残留草料相比,重新打包的氨氮含量更高,并且是唯一受重新打包影响的化学变量。好氧储存期间的捆包温度跟随环境温度直到实验 I 中的第 6-8 天和实验 III 中直到环境温度较低的第 14 天。总之,重新打包可以在不改变草料化学成分的情况下进行,但重新打包的草料中酵母和霉菌的数量可能更高,使用此程序时应考虑这种风险。与初始青贮饲料相比,重新包装的霉菌数量更高,但干草中的霉菌数量则不然。除了氨氮外,初始和重新打包的草料的化学成分相似。在实验 III 中,与初始和残留草料相比,重新打包的氨氮含量更高,并且是唯一受重新打包影响的化学变量。好氧储存期间的捆包温度跟随环境温度直到实验 I 中的第 6-8 天和实验 III 中直到环境温度较低的第 14 天。总之,重新打包可以在不改变草料化学成分的情况下进行,但重新打包的草料中酵母和霉菌的数量可能更高,使用此程序时应考虑这种风险。与初始青贮饲料相比,重新包装的霉菌数量更高,但干草中的霉菌数量则不然。除了氨氮外,初始和重新打包的草料的化学成分相似。在实验 III 中,与初始和残留草料相比,重新打包的氨氮含量更高,并且是唯一受重新打包影响的化学变量。好氧储存期间的捆包温度跟随环境温度直到实验 I 中的第 6-8 天和实验 III 中直到环境温度较低的第 14 天。总之,重新打包可以在不改变草料化学成分的情况下进行,但重新打包的草料中酵母和霉菌的数量可能更高,使用此程序时应考虑这种风险。与初始和残留草料相比,重新打包的氨氮含量更高,并且是唯一受重新打包影响的化学变量。好氧储存期间的捆包温度跟随环境温度直到实验 I 中的第 6-8 天和实验 III 中直到环境温度较低的第 14 天。总之,重新打包可以在不改变草料化学成分的情况下进行,但重新打包的草料中酵母和霉菌的数量可能更高,使用此程序时应考虑这种风险。与初始和残留草料相比,重新打包的氨氮含量更高,并且是唯一受重新打包影响的化学变量。好氧储存期间的捆包温度跟随环境温度直到实验 I 中的第 6-8 天和实验 III 中直到环境温度较低的第 14 天。总之,重新打包可以在不改变草料化学成分的情况下进行,但重新打包的草料中酵母和霉菌的数量可能更高,使用此程序时应考虑这种风险。
更新日期:2020-04-22
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