The fire disturbance regime at landscape scale in a watershed of Alongshan forest farm in northern parts of Daxinganling Mts.was studied through investigating a large number of fire scar tree in 96 sample plots.The most common fire type was surface fire and fire area usually large.The mean fire interval was about 37 years and fire rotation period was about 30 years.All these fire disturbance regimes were due to the fire resistence of Larix gmelinii and the constructure character of this community.There ...