[Objective] The rainfall redistribution characteristics of crop canopy were studied

in order to provide scientific basis for regional soil erosion control and ecological environment construction.[Methods] Soybean was used as the research object. The artificial rainfall simulation and spray method were used to observe the stalk flow

penetrating rainfall and canopy interception at different growth stages of soybean (seedling stage

initial blossoming stage

full flowering stage

pod bearing stage and initial pod filling stage) under different rainfall intensity (40

80 mm/h)

in order to explore the effects of canopy interception differentiation characteristics in the whole growth period of soybean and the influence of leaf area index and rainfall intensity on rainfall redistribution.[Results] The average stalk flow rate was 15.02%

the average penetration rate was 83.94%

and the average canopy interception rate was only 1.04%. It showed that the proportion of rainfall redistribution in canopy interception to rainfall redistribution was small

and its influence on rainfall spatial differentiation was relatively small. With the increase of leaf area index

the stalk flow rate and stalk flow rate

canopy interception and canopy interception rate of soybean increased significantly

but the penetration rain intensity and penetration rate decreased significantly. When the rainfall intensity increased from 40 mm/h to 80 mm/h

the stalk flow rate of soybean increased significantly

but there was no significant difference between stalk flow rate and rain intensity. The penetration rainfall increased significantly with the increase of rain intensity

but there was no significant difference between the penetration rate and the change of rainfall intensity.[Conclusion] The redistribution of rainfall by soybean canopy is mainly reflected in stalk flow and penetrating rain. Canopy interception accounts for a small proportion. And both leaf area index and rainfall intensity have an important effect on rainfall redistribution.