连作障碍是作物栽培中的一种普遍存在的问题,探讨连作导致大豆减产的因素及解决连作带来的生产障碍问题,已成为国内外研究关注的焦点。根系分泌物是植物在生长过程中通过根的不同部位向基质(土壤、营养液等)中溢泌或分泌的一组种类繁多的物质。阎吉昌指出,在连作大豆体系的研究中存在很多不足之处,例如对化感物质作用的选择性和专一性、对同一植物化感物质高 Continuous cropping obstacle is a ubiquitous problem in crop cultivation. It has become the focus of domestic and foreign research to explore the factors that lead to the continuous cropping of soybean and to solve the production obstacle caused by continuous cropping. Root exudates are a diverse group of substances that are secreted or secreted by the plant into the matrix (soil, nutrient solution, etc.) through different parts of the root during growth. Yan Jichang pointed out that there are many shortcomings in the study of continuous cropping system, such as the selective and specific effect of allelochemicals and the high sensitivity to the same plant allelochemicals