基于光能利用率模型估算大兴安岭北部火烧迹地生产力  

Estimating Net Primary Productivity of Northern Daxing'an Mountain Burned Blank Based on Light Utility Efficiency Model

作　　者：胡海清[1] 苏志杰[1] 孙龙[1] 魏书精[1] 

机构地区：[1]东北林业大学,哈尔滨150040

出　　处：《东北林业大学学报》2013年第5期71-74,共4页Journal of Northeast Forestry University

基　　金：国家自然科学基金(31070544);林业公益性行业科研专项(201004003-3);黑龙江省科技攻关重点项目(GA09B201-06);中央高校基本科研业务费专项资金项目(DL12CA07);研究生创新项目(gram09)资助

摘　　要：以大兴安岭火后不同强度(轻度、中度、重度)及未火烧区森林为研究对象,利用光能利用率模型和ETM+影像,结合植被资料,估算了火烧结束12 a后(1999年8月)过火区的针叶林、阔叶林、针阔混交林的净初级生产力(Net primary productivity,NP,P),分析了1987年"5.6"大火不同强度火烧对森林分布和生产力的影响。结果表明:轻度和中度过火区林地面积的比重与未过火区相近,且NP,P比未过火区高;重度过火区部分林地的比重降低,森林退化成非林地,但林地NP,P与未过火区相近。The research was conducted to estimate the net primary productivity （NPP） of conifer forests, broadleaf forests, mixed coniferous-broadleaf forests under different intensity （mild, moderate, severe） and unburned area in August 1999 （12 years after the fire broke out on May 6, 1987） by the light utility efficiency model and Landsat 7 ETM＋ data. We simulated the influence of the huge fire on forest distribution pattern and productivity. In the mild and moderate burned ar- eas, the proportion of woodland closed to unburned area and the NPP are higher than those in the unburned area. In severe burned zone, the proportion of woodland is lower than that in unburned zone. In the forest retrograded to non-forest land, the NPP is close to that in unburned area.

关 键 词：森林火灾 遥感 火强度 净初级生产力 

分 类 号：S762.1[农业科学—森林保护学]