大兴安岭3种主要林型兴安落叶松土壤种子库与天然更新  

The soil seed bank and natural regeneration of three main forest types in Daxing'anling

作　　者：阿日根 刘洋[1] 格日乐高娃 张准霞 高梅荣 阿柔罕 铁牛[1] Arigen;LIU Yang;Gerilegaowa;ZHANG Zhunxia;GAO Meirong;Arouhan;TIE Niu(College of Forestry,Inner Mongolia Agricultural University,Hohhot 010018,Inner Mongolia,China;The service Center of Trevor Jin Hanshan’s Locating Observation and Study Station of Forest Ecological Systems in Jared Banner,Tongliao 029100,Inner Mongolia,China;Ejinaqi Forest Public Security Bureau,Alashan 735400,Inner Mongolia,China)

机构地区：[1]内蒙古农业大学林学院,内蒙古呼和浩特010018 [2]扎鲁特旗特金罕山森林生态系统定位观测研究服务中心,内蒙古通辽029100 [3]额济纳旗森林公安局,内蒙古阿拉善735400

出　　处：《中南林业科技大学学报》2018年第10期66-70,共5页Journal of Central South University of Forestry & Technology

基　　金：国家重点研发计划重点专项"火烧及采伐迹地森林生态系统恢复和功能提升关键技术"(2017YFC0504003);国家自然科学基金项目(31360180)

摘　　要：以内蒙古大兴安岭北部兴安落叶松天然林的3种主要林型杜香-兴安落叶松林、杜鹃-兴安落叶松林、草类-兴安落叶松林为研究对象,利用样地调查数据,研究其土壤种子库与天然更新的相关性。采用SPSS及Winkelmass软件进行单因素方差、相关性及空间分布格局分析。结果显示:土壤种子在不同林型间存在显著差异,并且不同土层当中各林型组的种子密度均呈现明显的垂直分布。从土壤种子库与幼苗天然更新株数的相关系数来看,幼苗天然更新与土壤种子库有活力种子及枯落物层种子的相关性极好、与土层0～5 cm的种子存在显著正相关,而与土层5～10 cm种子相关性不显著。3种主要林型平均角尺度分别是:杜香-兴安落叶松林w=0.595、杜鹃-兴安落叶松林w=0.576、草类-兴安落叶松林w=0.596,平均角尺度均大于0.517,更新幼苗分布格局均呈现聚集分布。幼苗天然更新与土壤种子库有一定的关联性,种源条件是制约兴安落叶松天然更新的主要因素之一。The Daxing’anling in Inner Mongolia in northern Larix gmelinii forest three main forest types,that is Ledum palustre L.-Larix forest,Rhododendron simsii Planch.-Larix forest,Herbage-Larix forest.Using the sample plot survey data,the study of soil seed bank and the correlation of natural regeneration.By SPSS and Winkelmass software to carry on the single factor variance,correlation and spatial distribution pattern analysis.The results showed that significant differences between soil seed in different forest types,and different soil seed density in various forest types of group were present obvious vertical distribution.Soil seed bank and seedling natural update number of correlation coefficient,the seedling natural regeneration and soil seed bank of energetic seed and litter layer correlation was good,and the soil 0-5 cm seeds existed significant positive correlation,and the soil had no significant correlation between 5-10 cm seeds.The average angular scale of three main forest types is respectively:Ledum palustre L.-Larix forest w=0.595,Rhododendron simsii Planch.-Larix forest w=0.576,Herbage-Larix forest w=0.596,The mean angular scale is greater than 0.517,update seedlings gathered distribution distribution pattern were presented.The distribution patterns of seedlings were updated an aggregate distribution.Seedling natural regeneration and soil seed bank has certain relevance,provenance conditions is one of the main factors of restricting Larix gmelini natural regeneration.

关 键 词：兴安落叶松 天然更新 土壤种子库 空间分布格局 

分 类 号：S791.222[农业科学—林木遗传育种]