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Medicinal plants are a rich source of secondary metabolites, which can be used in veterinary medicine as growth stimulants and as next-generation antibacterials. Medicinal plants are used in the food, feed, pharmaceutical, cosmetic, and other industries because of their antiviral, antitumor, anti-inflammatory, and antioxidant properties. The feed industry has found use for medicinal plants because they contain substances with unique biological (antimicrobial, immunomodeling, anti-stress, growth-stimulating, etc.) properties. The use of synthetic antibiotics and hormones can be reduced by adding phytogenic feed additives in the form of powders or extracts to the feed. This improves the health of the animals and lowers their morbidity and mortality rates. This review aimed to study the role of plant-based preparation (phytobiotics based on extracts of medicinal plants) in the development of animal husbandry and the potential of medicinal plants as a resource for their production. The most important properties of plant extracts are their antibiotic properties, which can significantly reduce the use of feed antibiotics when raising animals and reduce antibiotic resistance in the human body when consuming animal products. The development of plant-based antibacterial agents and their application in animal husbandry are relevant given the high profitability of food production, which is a global trend that benefits both animals' and people's health.

Nanocellulose materials are distinguished by their safety, biodegradability, and adaptability. It was shown that bacterial nanocellulose does not contain lignin and hemicellulose and has an ultrafine network structure. The wide compatibility of such materials with biological molecules and the ability to change their structure makes nanocellulose a promising material for medical applications. Today, in the production of nanocellulose, mainly softwood is used. Despite the obvious advantages of nanocellulose, the limiting factor in production is the high cost of wood raw materials and the environmental damage caused by deforestation. Therefore, there is increasing interest in cheap and annually renewable herbaceous plant biomass, which is a potential raw material with a negative cost for the synthesis of nanocellulose. This review aimed to evaluate the viability of using Miscanthus plant genus as the primary source of nanocellulose. The characteristics of various types of nanocellulose and methods for their preparation from miscanthus are discussed. Miscanthus plants are disease resistant, frost resistant, and grow rapidly. The biomass growth of this plant reaches 35 tons per hectare, and the life span of miscanthus reaches 20 years. Miscanthus is a promising source of nanocellulose crystals because it is rich cellulose. The development of effective methods for obtaining nanocellulose will allow the introduction of a new class of materials for the production of biotechnical composite liquid and solid compositions, as well as raw materials for the food, medical, and pharmaceutical industries.