Fire Environment Mechanism of Lightning-groundfire for Daxing'anling Mountains  

作　　者：WANG Mingyu SHU Lifu TIAN XiaoruiWildfire Group. Institute of Forest Ecology. Environment and Protection.Chinese Academy of Forestry. Beijing 100091.P.R. Chinafire @prot. forestry. ac.cn 

出　　处：《Chinese Forestry Science and Technology》2003年第1期28-33,共6页中国林业科技（英文版）

基　　金：Supported by the China NKBRSF Project(No.2001CB409600)and Key Technologies R&D Programme(No.2001BA510B09);Social Public Fund Project(Lightning Fire)

摘　　要：Ground fire is an igniting phenomenon that is difficult to control and lightning is the main cause of ground fire. The mechanism of lightning-ground fire is very complex. Daxing'anling Mountains forest region is the place that lighting-groundfire occurs more often and regularly. Our study on lightning-groundfire of this zone in 2002 shows: much more soil near the surface and the ground fuel is the matter preconditions of lightning-groundfire, and the weather conditions hasten the occurrence of lightning...Ground fire is an igniting phenomenon that is difficult to control and lightning is the main cause of ground fire. The mechanism of lightning-ground fire is very complex. Daxing'anling Mountains forest region is the place that lighting-groundfire occurs more often and regularly. Our study on lightning-groundfire of this zone in 2002 shows: much more soil near the surface and the ground fuel is the matter preconditions of lightning-groundfire, and the weather conditions hasten the occurrence of lightning-groundfire. Especially in the conditions with low precipitation, long time drought, increasing surface temperature, relative humidity depressing and fuel dryness, lightning-groundfire is easy to occur. Lightning-groundfire has spatiotemporal character. Lightning-groundfire occurs mostly in primary forest zone, such as conifer forest, broadleaf forest, conifer and broadleaf mixed forest. Lightning-groundfire often burns slowly, for a long time and completely, and it has the characteristics of high concealment, discrete burning, and variable spreading. Lightning-groundfire is the fire that damages the forest most, especially in Larix gmelini (Rupr.) Rupr., Pinus sylvestris L. var. mongolica Litv., Picea koraiensis Nakai. Lightning-groundfire as one complex phenomenon is difficult to be put out.

关 键 词：lightning-groundfire moisture content HUMUS TURF fire weather 

分 类 号：S76[农业科学—森林保护学]