内蒙古鄂托克前旗荒漠草原植物群落的数量分类与排序  

Numerical classification and ordination of the desert steppe plant community in Etuokeqianqi,Inner Mongolia

作　　者：金玲 陆颖 马红彬[1,2,3] 谢应忠 沈艳[1,2,3] JIN Ling;LU Ying;MA Hong-bin;XIE Ying-zhong;SHEN Yan(Agriculture College,Ningxia University,Yinchuan 750021,China;Ningxia Grassland and Animal Husbandry Engineering Technology Research Center,Yinchuan 750021,China;Key Laboratory of Restoration and Rehabilitation of Degraded Ecosystem in Northwestern China,Yinchuan 750021,China)

机构地区：[1]宁夏大学农学院,宁夏银川750021 [2]宁夏草牧业工程技术研究中心,宁夏银川750021 [3]西北土地退化与生态恢复省部共建国家重点实验室培育基地,宁夏银川750021

出　　处：《草业学报》2022年第4期12-21,共10页Acta Prataculturae Sinica

基　　金：国家重点研发计划项目(2106YFC0500505);宁夏高等学校一流学科建设(草学学科)项目(NXYLXK2017A01);宁夏重点研发计划项目(2018BFH03009,2020BBF02003);宁夏科技创新领军人才培养项目(KJT2018003)资助。

摘　　要：了解草地群落类型、分布及其与土壤环境的关系,对草地科学管理及生物多样性保护具有重要意义。以内蒙古鄂托克前旗荒漠草原的100个样地为研究对象,通过野外调查与室内分析相结合的方法,对试验区内100个样地的植物群落数量特征进行观测和分析,测定土壤理化因子,采用双向指示种法(two-wayindicatorspeciesanalysis,TWINSPAN),对植物群落数量进行分类,并采用典范对应分析法(CCA)分析植物群落与土壤因子的关系,结果表明:1)研究区内荒漠草原分为黑沙蒿+短花针茅群落,短花针茅+芨芨草群落,冰草+芨芨草群落,黑沙蒿+苦豆子群落,中间锦鸡儿+牛枝子群落,短花针茅+猫头刺群落,苦豆子+短花针茅群落,大针茅+白刺群落8个类型。2)CCA排序结果表明,土壤主要理化因子与排序轴的相关性由大到小分别为碱解氮、速效钾、全磷、土壤容重、全氮、速效磷、有机质和总碳。碱解氮和速效钾对内蒙古鄂托克前旗荒漠草原植物群落分布影响较大。3)TWINSPAN分类与CCA排序结合反映了群落分布特征与环境因子之间的关系,可为内蒙古鄂托克前旗荒漠草原生态建设和可持续利用提供参考。It is very important in grassland scientific management and biodiversity protection to understand the grassland community types,and their distribution and relationship with edaphic factors.In this research,100 sample sites on the desert steppe of Etuokeqianqi in Inner Mongolia were investigated.We used two-way indicator species analysis(TWINSPAN)to classify the plant communities,and canonical correspondence analysis(CCA)to analyze the relationship between plant communities and soil factors.It was found that:1)The flora types of desert steppe in the study area can be divided into Artemisia ordosica+Stipa breviflora,S.breviflora+Achnatherum splendens,Agropyron cristatum+A.splendens,A.ordosica+Sophora alpecuroides,Caragana liouana+Lespedeza potaninii,S.breviflora+Oxytropis aciphylla,S.alopecuroides+S.breviflora,Stipa grandis+Nitraria tangutorum.2)CCA ordination results showed that the correlation between soil physical and chemical factors and the plant species ordination axis was driven by alkali hydrolyzable nitrogen,available potassium,total phosphorus,soil bulk density,total nitrogen,available phosphorus,organic matter and total carbon.Alkali hydrolyzable nitrogen and available potassium had the greatest impact on the distribution of plant communities at the study site.3)The combination of TWINSPAN classification and CCA ordination elucidates the relationship between community distribution patterns and environmental factors,and thus provides reference information for ecological management and decisions fostering sustainable utilization of desert steppe in Etuokeqianqi,Inner Mongolia.

关 键 词：荒漠草原 群落分类 CCA排序 土壤因子 

分 类 号：S812[农业科学—草业科学]