大兴安岭不同冻土活动层对兴安落叶松生长和更新的影响  

Effects of Different Permafrost Active Layers on Growth and Regeneration of Larix gmelinii

作　　者：刘雅楠 铁牛[1,2] 刘洋 LIU Yanan;TIE Niu;LIU Yang(College of Forestry,Inner Mongolia Agricultural University,Hohhot 010019,China;Inner Mongolia Academy of Forestry Sciences,Hohhot 010010,China)

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：《林业调查规划》2023年第3期162-168,174,共8页Forest Inventory and Planning

基　　金：内蒙古自治区科技计划项目(2020GG0067).

摘　　要：研究不同冻土活动层兴安落叶松的生长状态、更新苗生长和碳储量变化,探讨冻土与植被的依存关系,为今后大兴安岭兴安落叶松的经营提供参考。通过3年野外调查数据分析,对比兴安落叶松胸径、树高、生物量,更新苗的生长指标、枯损碳量和进阶碳量的变化差异。结果表明,随着冻土活动层深度的增加,不同径阶组中不同活动层兴安落叶松生长趋势为CK>2.0 m活动层>1.0 m活动层>0.5 m活动层,且差异性均为显著(P<0.05);不同厚度的冻土活动层兴安落叶松更新苗的各生长指标均有显著差异性(P<0.05),其中地径和树高差异达极显著(P<0.001);随着冻土活动层深度的增加,碳的生产力也逐渐增加,进阶碳量的总体趋势为CK>2.0 m活动层>1.0 m活动层>0.5 m活动层,枯损碳量呈相反趋势(CK<2.0 m活动层<1.0 m活动层<0.5 m活动层)。因此,冻土活动层厚度的不同是影响兴安落叶松生长发育和碳储量释放的重要因素,本研究为今后高效经营大兴安岭冻土区兴安落叶松提供了重要的理论依据。This paper studied the changes of growth state,regeneration and carbon storage of Larix gmelinii under different permafrost active layers,and explored the interdependence between frozen soil and vegetation,in order to provide reference for the future management of Larix gmelinii.The changes of DBH,tree height,biomass,growth index,litter loss carbon and advanced carbon of young seedlings were compared through 3-year field investigation data.The results showed that with the increase of permafrost active layer,the growth trend of Larix gmelinii under different active layer in different diameter groups presented CK>2.0 m active layer>1.0 m active layer>0.5 m active layer,and the differences were significant(P<0.05);under the permafrost active layer of different thickness,there were significant differences in growth indexes of young seedlings(P<0.05),among which ground diameter and tree height were extremely significant differences(P<0.001);with the increase of permafrost active layer thickness,carbon productivity gradually increased,and the overall trend of advanced carbon was CK>2.0 m active layer>1.0 m active layer>0.5 m active layer,there was an opposite trend in depleted carbon(CK<2.0 m active layer<1.0 m active layer<0.5 m active layer).Therefore,the thickness of permafrost active layer was an important factor affecting the growth and development of Larix gmelinii and carbon storage release.This study provided an important theoretical basis for efficient management of Larix gmelinii in the Greater Khingan Mountains permafrost region in the future.

关 键 词：兴安落叶松 冻土活动层 冻土地温 天然更新 大兴安岭 

分 类 号：S791.222[农业科学—林木遗传育种] S758.52[农业科学—林学] S754S152.8