There is an immediate need to identify alternative sources of high-nutrient feedstocks for domestic livestock production and poultry, not only to support growing food demands but also to produce microalgae-source functional foods with multiple health benefits. Various species of microalgae and cyanobacteria are used to supplement existing feedstocks. In this review, microalgae have been defined as a potential feedstock for domestic animals due to their abundance of proteins, carbohydrates, lipids, minerals, vitamins, and other high-value products. Additionally, the positive physiological effects on products of animals fed with microalgal biomass have been compiled and recommendations are listed to enhance the assimilation of biomolecules in ruminant and nonruminant animals, which possess differing digestive systems. Furthermore, the role of microalgae as prebiotics is also discussed. With regards to large scale cultivation of microalgae for use as feed, many economic trade-offs must be considered such as the selection of strains with desired nutritional properties, cultivation systems, and steps for downstream processing. These factors are highlighted with further investigations needed to reduce the overall costs of cultivation. Finally, this review outlines the pros and cons of utilizing microalgae as a supplementary feedstock for poultry and cattle, existing cultivation strategies, and the economics of large-scale microalgal production.

中文翻译：

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微藻饲料：用于畜禽生产的有前途的替代原料

迫切需要为国内畜牧生产和家禽确定高营养原料的替代来源，不仅要满足不断增长的食品需求，还要生产具有多种健康益处的微藻源功能性食品。各种微藻和蓝藻被用来补充现有的原料。在这篇综述中，微藻被定义为家畜的潜在原料，因为它们富含蛋白质、碳水化合物、脂质、矿物质、维生素和其他高价值产品。此外，还汇编了对饲喂微藻生物质的动物产品的积极生理影响，并列出了建议，以增强具有不同消化系统的反刍动物和非反刍动物对生物分子的同化。此外，还讨论了微藻作为益生元的作用。对于用作饲料的微藻的大规模培养，必须考虑许多经济权衡，例如选择具有所需营养特性的菌株、培养系统和下游加工步骤。需要进一步调查以降低种植的总体成本，从而突出了这些因素。最后，这篇综述概述了利用微藻作为家禽和牛的补充原料的利弊、现有的栽培策略以及大规模微藻生产的经济性。栽培系统和下游加工步骤。需要进一步调查以降低种植的总体成本，从而突出了这些因素。最后，这篇综述概述了利用微藻作为家禽和牛的补充原料的利弊、现有的栽培策略以及大规模微藻生产的经济性。栽培系统和下游加工步骤。需要进一步调查以降低种植的总体成本，从而突出了这些因素。最后，这篇综述概述了利用微藻作为家禽和牛的补充原料的利弊、现有的栽培策略以及大规模微藻生产的经济性。