Effects of stage of maturity at harvest, wilting and LAB inoculant on aerobic stability of wheat silages
Effects of stage of maturity at harvest, wilting and LAB inoculant on aerobic stability of wheat silages
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DOI：
10.1016/j.anifeedsci.2010.03.006
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发表时间：
2010-06-02
影响因子：
3.2
通讯作者：
Arieli, A.
中科院分区：
文献类型：
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作者：
Weinberg, Z. G.;Khanal, P.;Arieli, A.
研究了品种、采收成熟期、枯萎和青贮期添加乳酸菌(LAB)菌剂对小麦青贮料有氧稳定性的影响及其相互作用。两个小麦品种在开花期或乳熟期收获后，在微型筒仓中进行青贮，分别在割后(DC)和枯萎(W)后进行。贮藏2-7个月后，对青贮料进行为期7天的有氧稳定性试验，测定其化学成分、干物质(DM)和中性洗涤纤维(F)消化率、温度、干物质损失量和二氧化碳生成量的变化。小麦品种BH的青贮料相对干燥(DM在287~430g/kg之间)，在有氧暴露下基本稳定。品种Galil的开花小麦水分较高(DM为199g/kg)，DC青贮料在好氧条件下稳定。枯萎开花小麦青贮料(DM 370g/kg)腐烂后，第4天和第7天分别产生15和76g/kg DM CO2。从该品种乳熟期的青贮料中，DC和W都不稳定，均一发酵实验室促进了好氧腐败。以品种、成熟期、枯萎病和接种剂为主效应主效应及其交互作用，进行析因方差分析。品种和乳酸菌接种剂对青贮料组成和好氧稳定性有影响，成熟期对好氧损失有影响，枯萎病对好氧腐败指标无影响。与含有高浓度VFA的对照青贮料相比，接种剂提高了花期和乳熟期DC小麦青贮料中CO2的产量。然而，在VFA含量较低的枯萎青贮料中，对照青贮料和接种青贮料随着暴露时间的延长而变质程度相似。(C)2010爱思唯尔B.V.保留所有权利。
The objective was to study effects of cultivar, stage of maturity at harvest, wilting, and addition of lactic acid bacterial (LAB) inoculant at ensiling, and their interactions, on the aerobic stability of wheat silages. Wheat of two cultivars, harvested at the flowering or the milk stage of maturity were ensiled in mini-silos, either directly after cutting (DC) or after wilting (W). After 2-7 months of storage, silages were subjected to a 7-day aerobic stability test during which changes in chemical composition, dry matter (DM) and neutral detergent fiber (aNDF) digestibility, and temperature, as well as DM losses and CO2 production, were measured. Silages from wheat cultivar BH were relatively dry (DM between 287 and 430 g/kg) and were mostly stable upon aerobic exposure. The flowering wheat of cultivar Galil was moister (DM of 199 g/kg), and the DC silages were stable upon aerobic exposure. Silages of the wilted flowering wheat (DM of 370 g/kg) spoiled and after 4 and 7 days, produced 15 and 76 g/kg DM CO2, respectively. Silages from the milk stage of this cultivar, both DC and W were unstable, and a homofermentative LAB enhanced aerobic spoilage. Factorial analysis of variance was applied to the results with cultivar, stage of maturity, wilting and inoculant as main effects, as well as their interactions. Cultivar and LAB inoculant had effects on silage composition and aerobic stability, with stage of maturity having an effect on aerobic losses, whereas wilting did not have effects on aerobic spoilage indicators. The inoculant enhanced CO2 production in the silages prepared from the DC wheat of the flowering and milk stages, as compared with the respective non-inoculated control silages which contained high concentrations of VFA. However, in the wilted silages which contained less VFA, both control and inoculated silages deteriorated similarly with time of exposure to air. (C) 2010 Elsevier B.V. All rights reserved.