Resistance to aerobic deterioration of total mixed ration silage: effect of ration formulation, air infiltration and storage period on fermentation characteristics and aerobic stability
Resistance to aerobic deterioration of total mixed ration silage: effect of ration formulation, air infiltration and storage period on fermentation characteristics and aerobic stability
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DOI：
10.1002/jsfa.3057
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发表时间：
2008-01-01
影响因子：
4.1
通讯作者：
Nishino, Naoki
中科院分区：
文献类型：
--
作者：
Wang, Fujin;Nishino, Naoki
背景：当湿啤酒糟作为全混合日粮（TMR）青贮饲料储存时，可以预期高的有氧稳定性。结果：以湿啤酒糟、干草、玉米、麦麸、甜菜渣和糖蜜为原料，在实验室青贮窖中分别青贮14 d和56 d。研究了不同干草品种（卢塞恩或苏丹草）和不同空气渗透率（Exp. 1)以及从六种成分中排除一种、两种或三种成分（Exp. 2)进行了检查。乙醇是本研究中所有TMR青贮饲料的主要发酵产物。在用苏丹草干草沿着空气渗透制备的14天青贮饲料中发生好氧劣化（Exp. 1），并与最简单的配方，其中三个项目（干草，玉米和麦麸）被排除在外（实验。2）。无论日粮配方和空气渗透，56天的青贮饲料没有发生恶化。在56天的青贮饲料中，除了最简单的配方外，酵母菌减少到102 cfu g（-1）水平，并且在空气存在下仍然检测不到（实验1）。结论：TMR青贮饲料在一定的青贮期内具有抗有氧变质的能力。当空气渗透或TMR混合物中使用的成分较少时，仅储存几周的青贮饲料可能容易变质。(C)2007化学工业协会。
BACKGROUND: High aerobic stability can be expected when wet brewers' grains are stored as a total mixed ration (TMR) silage. To understand the factors affecting the stability, the effects of ration formulation, air infiltration and storage period were studied.RESULTS: A TMR containing wet brewers' grains, hay, maize, wheat bran, beet pulp and molasses was ensiled in laboratory silos for 14 and 56 days. The effects of hay species (lucerne or sudangrass) and air infiltration (Exp. 1) and of excluding one, two or three items from the six ingredients (Exp. 2) were examined. Ethanol was the main fermentation product in all TMR silages in this study. Aerobic deterioration occurred in 14 day silages prepared with sudangrass hay along with air infiltration (Exp. 1), and with the simplest recipe where three items (hay, maize and wheat bran) were excluded (Exp. 2). No deterioration occurred in 56 day silages regardless of ration formulation and air infiltration. Yeasts receded in 56 day silages, except with the simplest recipe, to the 102 cfu g(-1) level and remained undetectable in the presence of air (Exp. 2).CONCLUSION: TMR silage can resist aerobic deterioration provided that a sufficient ensiling period has elapsed. Silages stored for only a few weeks may be susceptible to deterioration when air is infiltrated or where fewer ingredients are used in the TMR mixture. (C) 2007 Society of Chemical Industry.