丹霞地貌桫椤群落土壤养分及有机质的垂直分异  

Vertical Variations of Soil Nutrients and Organic Matter in Alsophila spinulosa Community of Danxia Landform in North Guizhou

作　　者：蒋长洪 漆基海[1] 翁涛 穆君 白小节 高露 胡小润 臧丽鹏 何跃军 JIANG Changhong;QI Jihai;WENG Tao;MU Jun;BAI Xiaojie;GAO Lu;HU Xiaorun;ZANG Lipeng;HE Yuejun(Guiyang Urban Greening Service Center,Guiyang,Guizhou 550003,China;Forestry College,Forest Ecology Research Center,Guizhou University,Guiyang,Guizhou 550025,China;Management Bureau of Chishui Alsophila Spinulosa National Nature Reserve,Chishui,Guizhou 564700,China)

机构地区：[1]贵阳市城市绿化服务中心,贵州贵阳550003 [2]贵州大学林学院/贵州大学森林生态研究中心,贵州贵阳550025 [3]贵州省赤水桫椤国家级自然保护区管理局,贵州赤水564700

出　　处：《山地农业生物学报》2021年第4期12-17,共6页Journal of Mountain Agriculture and Biology

基　　金：国家自然基金(31660156);贵州省计划项目(黔科合支撑[2021]一般455);贵州省高层次创新型人才平台项目([2020]6004、[2017]5788和[2018]5781);贵州省生态学重点学科建设项目(黔学位合字ZDXK[2016]7);贵州省赤水桫椤国家级自然保护区小黄花茶调查专项。

摘　　要：黔北丹霞地貌是桫椤(Alsophila spinulosa)种群集中分布区,不同物种组成的桫椤群落在土壤养分是如何随土层深度垂直分布的特征缺乏关注。探索桫椤群落土壤养分及有机质含量随土层深度的变化特征,对深入探索桫椤种群濒危机制及保育技术具有重要意义。论文选择贵州赤水和习水国家自然保护区丹霞地貌4个典型桫椤群落样地进行样方调查,并采集0~10 cm、10~20 cm、20~30 cm土壤样品,测定土壤全氮、全磷、全钾、碱解氮、速效磷、速效钾及有机质含量,分析不同群落样地和不同土层深度对土壤性质的影响。结果表明:不同桫椤群落类型和土层深度共同影响土壤全氮和有效态氮、磷、钾含量和有机质含量,且二者交互作用对有效态养分和有机质显著影响;土壤全氮、碱解氮、速效钾和有机质含量,N/P、N/K、P/K比率随土层深度增加而降低,而速效磷则是随土层深度增加而增加趋势。研究表明,黔北丹霞地貌桫椤群落土壤养分和有机质含量随群落物种组成和土层深度变化而垂直分异。The Danxia landform in northern Guizhou is one pivot area of natural Alsophila spinulosa.However,the vertical distribution of soil nutrients in different species of A.spinulosa community with soil depth was not lack of attention.Therefore,studying on variations in soil nutrient and organic matter contents among soil depths acted a key role in exploring the endangered mechanisms and conservation technology of A.spinulosa.This study investigated four A.spinulosa communitiesin Chishui and Xishui national natural reserve of Guizhou province,China.By performing community investigation,we collected soil samples from depth of 0~10 cm,10~20 cm,20~30 cm and analyzed soil total nitrogen content,total phosphorus content,total potassium content,available nitrogen content,available phosphorus content,available potassium content and organic matter content to understand the response of soil properties to community and soil depth.Results showed that both different types of A.spinulosa communities and soil depth had significant influence on soil total nitrogen content,soil available nitrogen,available potassium content and organic matter content.And this interactive effect also significantly influenced soil available nutrient and organic matter contents.Soil total nitrogen,available nitrogen,available potassium,organic matter content,the ratio of N/P,N/K,P/K decreased with soil depth increasing.However,the soil available phosphorus content had an increasing trend as soil depth increased.In total,the soil nutrient and organic matter contents of A.spinulosa communities in Danxia landform in northern Guizhou had significant vertical variations with species composition and soil depth.

关 键 词：桫椤 土壤养分 有机质 垂直分异 

分 类 号：Q948[生物学—植物学]