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β-glucan is a kind of natural polysaccharide, which can be used as a green additive in many fields such as food and aquaculture, and has sustainability and ecological friendliness. β-glucan has many biological functions, which can inhibit and eliminate excessive free radicals in vivo, activate the antioxidant enzyme system and reduce the degree of oxidative stress. β-glucan can reduce the production of inflammatory factors and alleviate the tissue damage caused by inflammation by regulating the inflammatory pathway. β-glucan can repair intestinal barrier, regulate intestinal microecology, and reduce the penetration of bacteria and toxins. β-glucan can regulate glucose and lipid metabolism, ensure that animals get enough energy supply, and thus maintain the health of the body. In this paper, the characteristics, biological functions and application status of β-glucan in livestock and poultry and aquaculture were reviewed in order to provide a reference for further application of β-glucan in animal breeding. [ABSTRACT FROM AUTHOR]

Straw bio-fermentation feed is made by fermenting straw with enzyme preparation and live bacteria preparation, which has high nutritional value and high digestibility, can be efficiently utilized by animals. Straw bio-fermented feed can improve animal growth performance, regulate intestinal flora, promote rumen fermentation and improve the quality of animal products such as meat, eggs and milk. The paper reviews the fermentation mechanism and industrial utilization technology of straw bio-fermented feed, and discusses its application in animal production and its impact on the economic benefits of breeding, to provide a reference for the healthy and sustainable development of feed industry. [ABSTRACT FROM AUTHOR]