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Management of Enteric Methanogenesis in Ruminants by Algal-Derived Feed Additives
Current Pollution Reports ( IF 7.3 ) Pub Date : 2020-07-07 , DOI: 10.1007/s40726-020-00151-7
Janice I. McCauley , Leen Labeeuw , Ana C. Jaramillo-Madrid , Luong N. Nguyen , Long D. Nghiem , Alex V. Chaves , Peter J. Ralph

Purpose of Review

In this paper, we critically review the current state of nutritional management strategies to reduce methane emissions resulting from enteric fermentation in livestock production. In this context, it highlights the novel strategy regarding the use of macroalgal- and microalgal-derived feed additives.

Recent Findings

Several feed management strategies for ruminants focus on the inclusion of nutritional supplements, increasing proportion of starch, or supplementation with high-energy lipids. These strategies aim to improve animal productivity, whilst at the same time reduce methane emissions. Algae supplements are currently investigated as novel ingredients for decreasing methanogenesis, with the potential production of algal biomass also contributing to reducing greenhouse gas emissions. Thus, utilisation of algal biomass as a feed concentrate in dietary supplementation presents a sustainable and environmentally friendly strategy.

Summary

This review summarises the current stage of research on dietary strategies and their influences on the metabolic processes during enteric fermentation. This information is essential for developing strategies to mitigate methane emissions in the livestock industry. We specifically present the opportunities that algae could offer as a feed additive for methanogenic reduction in cattle. The data compiled from the peer-reviewed literature revealed synergistic effects of algal biomass on methane reduction and animal productivity. However, the challenges regarding the mass cultivation of macro- and microalgae were noticed. Considering the diversity of algal species, future research should increase screening efforts to include more species and dosage evaluation, along with efforts to see if such effects are sustained over time.


中文翻译:

藻类饲料添加剂对反刍动物肠甲烷生成的管理

审查目的

在本文中,我们严格审查了营养管理策略的现状,以减少牲畜生产中肠发酵引起的甲烷排放。在这种情况下,它突出了有关使用大藻类和微藻类饲料添加剂的新颖策略。

最近的发现

反刍动物的几种饲料管理策略集中于包括营养补充剂,增加淀粉的比例或补充高能脂质。这些策略旨在提高动物生产力,同时减少甲烷排放。目前正在研究藻类补品作为减少甲烷生成的新成分,藻类生物质的潜在生产也有助于减少温室气体排放。因此,藻类生物质作为膳食补充剂中的饲料浓缩物的利用提出了可持续和环境友好的策略。

概要

这篇综述总结了饮食策略及其在肠发酵过程中对代谢过程的影响的研究现状。该信息对于制定减少畜牧业甲烷排放量的策略至关重要。我们特别介绍了藻类可作为饲料添加剂减少牛产甲烷的机会。从同行评审的文献中收集的数据揭示了藻类生物量对甲烷减少和动物生产力的协同作用。然而,注意到有关大规模和微藻大规模培养的挑战。考虑到藻类物种的多样性,未来的研究应加大筛查力度,包括更多种类和剂量评估,并努力观察这种影响是否会随着时间而持续。
更新日期:2020-07-07
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