The use of Lactobacillus species as starter cultures for enhancing the quality of sugar cane silage
The use of Lactobacillus species as starter cultures for enhancing the quality of sugar cane silage
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DOI：
10.3168/jds.2013-6987
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发表时间：
2014-02-01
影响因子：
3.5
通讯作者：
Schwan, R. F.
中科院分区：
文献类型：
--
作者：
Avila, C. L. S.;Carvalho, B. F.;Schwan, R. F.
甘蔗（甘蔗属）是广泛用于动物饲料的饲料作物，因为其干物质（DM）产量高（25至40 t/ha）和能量浓度高。甘蔗的青贮通常会引起酵母生长的问题，这导致整个发酵过程中DM的高损失。选择甘蔗专用青贮剂可以提高青贮饲料的品质。本研究旨在筛选从甘蔗青贮饲料中分离的乳酸菌菌株，并评估其作为添加剂在同一类型青贮饲料中的效果。将LAB菌株接种到甘蔗肉汤中以评估其代谢产物的产生。所选菌株产生较高浓度的乙酸和丙酸，并导致更好的青贮特性，如低酵母菌群，较低的乙醇含量，和较少的DM损失。这些数据证实，兼性异型发酵菌株不是甘蔗青贮接种的良好候选物，甚至可能通过增加整个过程中的DM损失而使青贮发酵的质量恶化。希氏乳杆菌菌株UFLA SIL 51和UFLA SIL 52导致青贮饲料具有与DM损失、低乙醇含量、较高LAB群体和低丁酸含量相关的最佳特性。推荐菌株UFLA SIL 51和SIL 52作为甘蔗青贮饲料的发酵剂。
Sugar cane (Saccharum spp.) is a forage crop widely used in animal feed because of its high dry matter (DM) production (25 to 40 t/ha) and high energy concentration. The ensiling of sugar cane often incurs problems with the growth of yeasts, which leads to high losses of DM throughout the fermentative process. The selection of specific inoculants for sugar cane silage can improve the quality of the silage. The present study aimed to select strains of lactic acid bacteria (LAB) isolated from sugar cane silage and to assess their effects when used as additives on the same type of silage. The LAB strains were inoculated into sugar cane broth to evaluate their production of metabolites. The selected strains produced higher concentrations of acetic and propionic acids and resulted in better silage characteristics, such as low yeast population, lower ethanol content, and lesser DM loss. These data confirmed that facultative heterofermentative strains are not good candidates for sugar cane silage inoculation and may even worsen the quality of the silage fermentation by increasing DM losses throughout the process. Lactobacillus hilgardii strains UFLA SIL51 and UFLA SIL52 resulted in silage with the best characteristics in relation to DM loss, low ethanol content, higher LAB population, and low butyric acid content. Strains UFLA SIL51 and SIL52 are recommended as starter cultures for sugar cane silage.