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首页> 外文期刊>Animal Feed Science and Technology >The effect of inoculant and sucrose addition on the silage quality of tropical forage legumes with varying ensilability.
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The effect of inoculant and sucrose addition on the silage quality of tropical forage legumes with varying ensilability.

机译：接种量和蔗糖添加量对不同青贮度的热带饲用豆科植物青贮饲料品质的影响。

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摘要

The ensiling potential of 10 tropical forage legumes and one Brachiaria grass hybrid with dry matter (DM) ranging from 260 to 540 g/kg fresh matter (FM), and the effect of 4 treatments (Control, 20 g/kg FM sucrose, native Lactobacillus plantarum inoculant, L. plantarum +20 g/kg FM sucrose) on the fermentation quality of their silages after 92 d storage were assessed at laboratory scale. Best silage qualities were achieved with high DM Clitoria ternatea (542 g/kg FM), while worst silages resulted from Centrosema brasilianum (259 g DM/kg FM), especially without sugar addition. In general, both additives increased lactic acid production while dropping the pH (P<0.001). High acidification was also correlated with restricted NH3-N formation (14 to 68 g/kg of total N in the combined treatment). Butyric acid concentrations ranged from 0 to 18 g/kg DM except for C. brasilianum silages (30 g/kg DM in Control, 25 g/kg DM in L. plantarum only treatment). No clear effect of treatment could be observed for this parameter. The fermentability coefficient predicted quite well the silage quality for a couple of materials, but not consistently overall. As nitrate was scarce in all plant materials (<2.1 g/kg DM), some clostridial activity was probably favored. Acetic acid concentrations were very low (acetic + propionic acid 0 to 18 g/kg DM) except for Vigna unguiculata silages (22 to 53 g/kg DM). All silages were regarded as aerobically stable during the 4-d period of temperature measurement, except for the Lablab purpureus silages treated with the combined additive. Further research is needed on suitable native lactic acid bacteria strains for tropical forage silages to select the most suitable inoculants for differing forage species and conditions, for improving silage quality. Legume silages in particular can provide a valuable source of protein for improved animal production, which represents a livelihood of many smallholders in the tropical belt.
机译：10种热带草料豆科植物和1种干物质（DM）的杂草（Brachiaria ）杂种的保藏潜力为260至540 g / kg新鲜物质（FM），以及4种处理的效果（对照，20贮藏92 d后，对青贮乳酸菌，青贮乳杆菌，20 L / s FM蔗糖的发酵质量进行了评估。实验室规模。高DM ternatea （542 g / kg FM）可获得最佳的青贮饲料品质，而 Berilialia （259 g DM / kg FM）导致最差的青贮饲料加糖。通常，两种添加剂均可提高乳酸产量，同时降低pH值（P <0.001）。高酸化也与限制NH 3 -N的形成有关（联合处理中总N含量为14至68 g / kg）。除℃外，丁酸浓度范围为0至18g / kg DM。巴西青贮饲料（对照组为30 g / kg DM，仅 plantarum 处理为25 g / kg DM）。对于该参数，未观察到明显的治疗效果。发酵系数很好地预测了两种材料的青贮品质，但总体上却不一致。由于所有植物材料中硝酸盐含量均不足（<2.1 g / kg DM），因此某些梭菌活性可能会受到支持。除 Vigna unguiculata 青贮饲料（22至53 g / kg DM）外，乙酸浓度非常低（乙酸+丙酸为0至18 g / kg DM）。除了用组合添加剂处理过的 Lablab purpureus 青贮饲料外，所有青贮饲料在温度测量的4天期间均被认为是有氧稳定的。需要对热带饲料青贮饲料的合适天然乳酸菌菌株进行进一步研究，以针对不同的饲料种类和条件选择最合适的接种剂，以提高青贮饲料的质量。尤其是豆类青贮饲料可以为改善动物生产提供有价值的蛋白质来源，这代表了热带地带许多小农的生计。

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