Resource Utilization of Peanut Shells: Nutritional Characteristics, Regulation of Antinutritional Factors, and...

In agricultural production, peanut shells, as a by-product of peanut processing, are often discarded. However, they are rich in fiber, crude protein, carbohydrates, minerals (such as calcium and phosphorus), as well as bioactive substances like polyphenols and flavonoids, thus having potential feeding value. Currently, the application potential of peanut shells in the field of animal nutrition has not been fully explored. The lack of comprehensive and systematic studies on their nutritional composition, digestive and metabolic characteristics, and optimal addition levels in different animal production systems limits the accurate evaluation and scientific application of their feeding value. In addition, different processing methods have significantly different effects on improving the nutritional components of peanut shells, and they contain anti-nutritional factors such as phytic acid and oxalic acid, whose contents vary greatly with peanut varieties and producing areas, further increasing the complexity of evaluating their feeding value. Although relevant studies have achieved certain results, there are still many issues in the development and utilization of peanut shells that need further in-depth exploration and optimization. This review will comprehensively evaluate the nutritional value of peanut shells, analyze in detail their conventional nutritional components, bioactive substances, and anti-nutritional factors, so as to clarify their true value in animal nutrition. Meanwhile, it will conduct in-depth research on the application effects of peanut shells in different livestock feeding systems. Through these studies, it aims to provide a scientific basis for the reasonable and efficient application of peanut shells in livestock feeding and offer new ideas and methods for solving the current problems of feed resource shortage and environmental issues.