根际激发效应(Rhizosphere priming e ffe ct)是指根际活动造成土壤有机质分解速率改变的现象,被认为是调控土壤碳氮循环的重要机制之一。目前,科研人员对根际激发效应开展了大量研究,发现激发效应可使土壤有机质分解速率降低50%或增加3.8倍,与温度、水分因子对土壤碳释放的影响程度相当。然而,这些研究结果还相对零散,限制了人们对根际激发效应的理解和应用。 Rhizosphere priming e ffe ct refers to the change of soil organic matter decomposition rate caused by rhizosphere activities and is considered as one of the important mechanisms for regulating soil carbon and nitrogen cycle. At present, researchers have conducted a great deal of research on the rhizospheric stimulating effect and found that the stimulating effect can reduce the rate of soil organic matter decomposition by 50% or 3.8 times, which is similar to the effect of temperature and moisture on soil carbon release. However, the results of these studies are relatively fragmented, limiting the understanding and application of rhizospheric stimulating effects.