Objective To screen and optimize the strain and apply it to the degradation of dead leaves of landscape tree species in forest firebreak belt for recycling of dead leaves and forest fire prevention.

Method The highly degrading strains were screened out by the degradation methods of leaf strips of tree species in color bio-fireproof forest belt and the degradation weight loss methods. The highly degrading strains and their combinations were selected by the experimental analysis of the degradation weight loss effect of the highly degrading strains and their combinations. In addition, their degradation rules on the dead branches and leaves were analyzed.

Result Through the degradation experiments of 11 strains on deciduous leaves and dead branches and leaves of 12 colorful landscape trees in the firebreak belt, Postia Placenta (Pp),Trichoderma Koningii (Tk1) and Polystictus versicolor (Pv) were found to have strong degradation ability and weight loss effect. The weight loss of Sassafras tsumu, Photinia × fraseri and Schima superba were 54.3% ± 2.3% and 62.1% ± 3.3% respectively.

Conclusion Pp + Pv, Pv + Tk1 and Pp + Tk1 have significant degradation effect on the tree species in the forest firebreak belts, which can be widely used as in the forest firebreak belts in the south of Jiangsu Province.