大兴安岭火烧迹地土壤有机质含量的Meta分析  

Meta analysis of soil organic matter content in burned land of Daxing'an Mountains

作　　者：张扬 铁牛[1,2] 刘洋 张晨[1] Zhang Yang;Tie Niu;Liu Yang;Zhang Chen(Forestry College of Inner Mongolia Agricultural University,Hohhot 010019;Inner Mongolia Academy of Forestry Sciences,Hohhot 01010)

机构地区：[1]内蒙古农业大学林学院,内蒙古呼和浩特010019 [2]内蒙古自治区林业科学研究院,内蒙古呼和浩特010010

出　　处：《中国林副特产》2021年第5期1-4,共4页Forest By-product and Speciality in China

基　　金：国家重点研发计划专项(2017YFc0504003-2)。

摘　　要：为了深入分析火烧强度和火烧年份对大兴安岭森林土壤有机质的影响。本研究基于Meta分析方法,定量评估火干扰对森林土壤有机质的影响,并通过亚组分析进一步探讨土壤有机质含量在不同火烧年限,不同火烧强度影响下的变化情况。结果表明:轻度火烧、中度火烧、重度火烧有机质含量的效应值均低于未火烧样地,分别为-0.0408、-0.0333、-0.0333。亚组分析的结果显示:(1)在火烧年限低于2年(包括2年)时,土壤有机质含量的效应值,轻度火烧和中度火烧高于未火烧样地,重度火烧低于未火烧样地。(2)在火后3~5年之间,土壤有机质含量的效应值轻度,重度火烧低于未火烧样地,中度火烧高于未火烧样地。(3)在火后6~10年之间,三种火烧强度的火烧样地土壤有机质含量的效应值均比未火烧样地低。(4)在火后11~30年之间,轻度和中度火烧后,土壤有机质含量的效应值高于未火烧样地,重度火烧土壤有机质含量的效应值低于未火烧样地。大兴安岭地区的森林土壤经过火烧后表现出增加土壤有机质含量的潜力。In order to deeply analyze the effects of burning intensity and burning year on forest soil organic matter in Daxing'an Mountains.Based on meta-analysis,the effects of fire disturbance on forest soil organic matter were quantitatively evaluated,and the effects of different fire restoration years and fire intensity on soil organic matter content were further explored through subgroup analysis.The contents of soil organic matter in the mild,moderate and severe fires were lower than those in the control plots.The results of subgroup analysis showed that when the burning time was less than 2 years,the effect value of soil organic matter content in mild fire and moderate fire was higher than that of control plot,and that of severe fire was lower than that of control plot.In 3-5 years after fire,the effect value of soil organic matter content was mild,and the effect value of severe fire was less than that of control plot,and that of moderate fire was higher than that of control plot.In the 6-10 years after the fire,the effect value of soil organic matter content in the plots of mild fire,moderate fire and severe fire was lower than that of the control plot.In 11-30 years after fire,the effect value of soil organic matter content after mild and moderate fire was greater than that of control plot.The forest soil in Daxinganling region showed the potential to increase soil organic matter content after fire.

关 键 词：火烧年限 火烧强度 土壤有机质 META分析 大兴安岭 

分 类 号：S153.621[农业科学—土壤学]