To optimize the cutting propagation technical system of Dalbergia odorifera and resolve the technical bottleneck of its low rooting efficiency,a two-factor experiment was conducted to investigate the effects of compound growth regulators(IAA+NAA)on its cutting propagation.The results demonstrated that:1)Hormone concentration,soaking time,and their interaction exerted highly significant effects(P<0.01)on key growth parameters,including rooting rate,root dry weight,and total root length.Further analysis revealed a nonlinear response of most measured traits to hormone concentration,with the 400 mg/L treatment yielding optimal performance across multiple indicators.Specifically,the C2T1 treatment(400 mg/L for 10 s)resulted in a rooting rate of 92.5%,a root dry weight of 0.035g,and significantly enhanced total root length,number of new shoots,and shoot dry weight compared to other treatments.2)The impact of soaking time was concentration-dependent:extended soaking improved rooting at low concentration(200 mg/L),whereas shorter durations(10 s to 1 min)were more beneficial at medium to high concentrations,and prolonged soaking(60 min)strongly inhibited growth.3)Correlation analysis indicated that rooting rate was significantly positively correlated with root dry weight(P<0.05)and highly significantly correlated with maximum root length,total root length,root number,shoot number,and shoot dry weight(P<0.01).Additionally,root dry weight was also highly significantly correlated with shoot dry weight,suggesting a synergistic relationship between the root system and aboveground growth.4)Principal component analysis(PCA)revealed that C2T1 as the optimal treatment,with its comprehensive score significantly surpassing those of other combinations.In conclusion,this study establishes a “medium concentration-short duration” strategy as highly effective for the cutting propagation of D.odorifera,providing a theoretical insights and practical parameters for large-scale asexual propagation of this valuable species.