Result: The ouptut decreased with the aggravation of the disease, and the decrease was obvious when the index of disease was above 60.The content of gentiopicroside and swertiamarin be...

• 结果:产量随病情加重而下降,在病情指数大于60时,产量下降明显,龙胆苦苷类成分含量在病情指数大于70时开始下降。