review · Animal Biotechnology
Rising animal feed prices and food competition between humans and livestock create a clear need for alternative non-food plant resources. Agricultural and plant wastes can cause pollution when mismanaged, yet they offer valuable alternatives to traditional feed, being particularly beneficial for ruminants due to high fibre and non-protein nitrogen levels. Paulownia trees, traditionally grown for timber, generate wastes such as leaves with notable nutritional, medicinal, and antibacterial characteristics. While their leaves have been used to feed ruminants, non-ruminants, and poultry, comprehensive understanding of their properties remains limited. Utilising these plant by-products in animal diets supports livestock productivity, reduces environmental contamination of soil, air, and water, and improves economic returns for feed manufacturers. Evaluating the phytochemical and nutritional profile of Paulownia waste highlights its role as an unconventional feed ingredient across various livestock categories.
High feed prices and food competition threaten livestock production and food security. Converting fast-growing Paulownia tree waste into animal feed addresses environmental pollution while providing a cost-effective, non-food alternative for farmers. Harnessing its nutritional and antibacterial properties supports sustainable livestock farming without depleting crops intended for human consumption.
The work highlights Paulownia waste as an unconventional ingredient for animal feed producers formulating diets for ruminants, non-ruminants, and poultry. While Paulownia leaves are already used in animal feeding, the review indicates that understanding of its full characteristics remains limited, suggesting that broader industrial adoption and standardised formulation are at an early research stage.
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Due to the continuous increase in animal feed prices, and the presence of competition between humans and animals on food materials, it is imperative to identify other non-food plant resources to assist the animal feed industry and improve livestock productivity. Plant wastes may cause air, soil, and water pollution. However, if judiciously managed, they would be important resources. Plant wastes are used as feedstuffs and fertilizers. However, their use as animal feed is more useful than fertilizers. Because of the high content of fiber and non-protein N, these wastes are more valuable for feeding ruminants than poultry. The use of the plant wastes as feedstuffs could improve the environmental quality and profits for feed producers. Paulownias are fast-growing trees initially cultivated for wood production. However, due to their good nutritive value, their leaves have been used for ruminants, non-ruminants animals and poultry feeding. Furthermore, they are well-known for its medicinal and antibacterial properties. However, little is still known about its characteristics. This review aimed at providing detailed information about the nature, nutritional value, phytochemicals, and uses of Paulownia as a promising feedstuff in the fields of ruminants, non-ruminants, and poultry nutrition.
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DOI: 10.1080/10495398.2020.1806074
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