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首页> 外文期刊>African Journal of Biotechnology >In vitro screening of selected essential oils from medicinal plants acclimated to Benin for their effects on methane production from rumen microbial fermentation
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In vitro screening of selected essential oils from medicinal plants acclimated to Benin for their effects on methane production from rumen microbial fermentation

机译：从适应贝宁的药用植物中筛选精选精油对瘤胃微生物发酵产生甲烷的影响

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Enteric methane production lowers the efficiency of feed utilization in ruminants and contributes to greenhouse gas emissions which are responsible for global climate change. This study examined the effects of nine essential oils (EO) from Citrus aurantifolia, Cymbopogon citratus, Eucalyptus citriodora, Laurus nobilis, Lippia multiflora, Mentha piperita, Ocimum basilicum, Ocimum gratissimum and Zingiber officinalis on enteric methane production in in vitro batch cultures screening experiments using Andropogon gayanus grass. Two in vitro batch culture incubation runs were conducted independently on separate days at two different ranges of dosages: 0 (control), 150, 300, 600 and 1200 mg/L inoculum and 0 (control), 25, 50, 100 and 150 mg/L inoculum. The effects of EO on in vitro gas production, methane production and apparent dry matter disappearance (DMD) were assessed relative to the control containing no additive. O. basilicum, E. citriodora, O. gratissimum and C. aurantifolia, significantly inhibited (Z’ ? 0 and relative decrease ≥ 15%) enteric methane production (g DM incubated) relative to control at dosages of 300-1200 mg/L and L. nobilis, C. citratus and M. piperita significantly decreased it at 600 and 1200 mg/L. A substantial decrease (Z’ ? 0 and relative decrease ≥ 15%) in methane production per g DM incubated was apparent for Z. officinalis and L. multiflora at dosage of 1200 mg/L. Most EO had globally negligible effects on methane production (Z’ ≤ 0 and relative decrease < 15%) at dosages of 25 to 150 mg/L. Substantial decrease in apparent DMD together with gas production (g DM) incubated was observed relatively to the control with Z. officinalis and L. multiflora at 1200 mg/L and with the remaining EO at 600 and 1200 mg/L. Overall, this ?screening investigation demonstrated that addition of assayed EO (except Z. officinalis and L. multiflora) at dosages close to 300 mg/L seem to potentially decrease enteric methane production with limited negative effects on dry matter digestibility of forage grass in vitro.
机译：肠甲烷的生产降低了反刍动物饲料利用的效率，并导致了导致全球气候变化的温室气体排放。这项研究检查了柑桔中的九种精油（EO），香茅（Cymbopogon citratus），柠檬桉（Eucalyptus citriodora），月桂（Laurus nobilis），百里香（Lippia multiflora），薄荷（Mentha piperita），罗勒（Ocimum），Ocimum gratissimum和Zingiber officinalis在体外批量生产肠甲烷筛选实验中的作用。使用Andropogon gayanus草。在不同的日期分别在两个不同的剂量范围内分别进行两次体外分批培养温育操作：0（对照），150、300、600和1200 mg / L接种物和0（对照），25、50、100和150 mg / L接种物。相对于不含添加剂的对照，评估了EO对体外气体产生，甲烷产生和表观干物质消失（DMD）的影响。相对于对照，剂量为300-1200 mg / L时，O。basilicum，E。citriodora，O。gratissimum和C. aurantifolia显着抑制（Z'= 0且相对降低≥15％）肠甲烷的产生（g DM孵育）。 L. nobilis，C。citratus和M. piperita分别在600和1200 mg / L时将其降低。在1200 mg / L的剂量下，Z。officinalis和L. multiflora的每g DM孵化的DM甲烷产量明显下降（Z'0，相对下降≥15％）。在25至150 mg / L的剂量下，大多数EO对甲烷产生的影响在全球范围内可忽略不计（Z'≤0，相对降低<15％）。相对于以1200mg / L的山茱Z和何首乌和以600和1200mg / L的剩余EO为对照，观察到表观DMD以及温育的产气量（g DM）的显着降低。总的来说，这项筛选研究表明，以接近300 mg / L的剂量添加测定的EO（除Z. officinalis和L. multiflora以外）似乎有可能降低肠甲烷的产生，并且对草料草的体外干物质消化率具有有限的负面影响。

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