关键词: 膳食纤维, 农产品副产物, 改性技术, 功能特性, 研究进展

Abstract: As a leading producer of agricultural by-products, China generates a significant amount of resources rich in dietary fiber (DF) that are wasted daily. Recognized as the "seventh nutrient," dietary fiber plays a vital role in human health, particularly natural soluble dietary fiber (SDF). To enhance the proportion of SDF in DF and improve its utilization, modification techniques have emerged as a key research focus. This article comprehensively reviews physical, chemical, biological, and combined modification strategies, analyzing the mechanisms and changes associated with each approach. It also summarizes the advantages and limitations of these techniques, providing a theoretical foundation for the efficient modification of dietary fiber. By promoting the high-value transformation of agricultural products, extending industrial chains, and increasing added value, this research holds significant importance for the sustainable development of agriculture and the advancement of the health food industry.

Key words: dietary fiber, agricultural by-products, modification technology, functional characteristics, research progress