[Objective] The research aimed to provide the theoretical support for the roof greening with the modified substrate as wormcast.[Method] In pot soil-culture experiment,the effects of earthworm and wormcast modified substrate on the seed germination,growth and development and the physiological indexes of Festuca arundinacea were studied.[Result] Earthworm and wormcast modified substrate could shorten the germination time of F.arundinacea seeds and increase the germination rate,had an obvious promotion effect...