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灵武白芨滩不同年限柠条固沙林林下草本群落演替规律及机制OA北大核心CSTPCD

Succession mechanism and dynamics in artificial Caragana korshinskii sand-fixing forests of different ages in Baijitan of Lingwu

中文摘要英文摘要

为探讨柠条固沙林林下草本群落演替序列与环境因子的关系,调查了灵武白芨滩不同种植年限(3、5、10、20、30、40、50、60和70年)柠条林下草本群落,测定了土壤理化性质,采用双向指示种分析(TWINSPAN)、除趋势对应分析(DCA)和冗余分析(RDA)的方法对群落进行数量分类和排序,并分析群落演替序列与环境因子间的关系.结果表明:1)应用TWINSPAN将9个样地的27个样方划分为4个群落类型:蒙古虫实+沙蓬群落→沙鞭+白沙蒿群落→狗尾草+藜群落→猪毛蒿+短花针茅群落.2)DCA 排序与TWINSPAN分类结果一致,DCA 排序进一步印证了TWINSPAN分类的合理性.3)通过冗余分析(RDA)显示,土壤有机质含量和土壤pH值是影响林下草本植物群落演替的主要环境因子,解释量分别为19.3%和13.6%,贡献率分别达37.5%和26.5%(P<0.05).本研究对揭示白芨滩固沙林林下草本群落演替规律和驱动因素具有重要意义,结果可为荒漠化治理及白芨滩自然保护区的科学管理提供理论依据.

This research explored the relationship between the succession sequence of the understory plant community and environmental factors in Caragana korshinskii plantations.We investigated the herbaceous communities in C.korshinskii forests of different ages(3,5,10,20,30,40,50,60 and 70 years)and determined the soil physical and chemical properties.Two-way indicator species analysis(TWINSPAN),detrended correspondence analysis(DCA)and redundancy analysis(RDA)were used for quantitative classification and sequencing.The relationship between community distribution and environmental factors was analyzed.It was found that:1)27 quadrats in nine plots were divided into a series of four community types by TWINSPAN:Corispermum mongolicum+Agriophyllum squarrosum community→Psammochloa villosa+Artemisia sphaerocephala community→Setaria viridis+Chenopodium album community→Artemisia scoparia+Stipa breviflora community.2)The results of TWINSPAN and DCA were consistent,and DCA further confirmed the rationality of the TWINSPAN classification.3)According to the RDA,soil organic carbon and soil pH value were the environmental factors that significantly affected the distribution of the herbage community under the C.korshinskii forest,explaining 19.3%and 13.6%,and contributing 37.5%and 26.5%(P<0.05).This research identifies the species succession and its driving factors in the understory herbaceous community in the sand-fixing forest of Baijitan.The results provide a theoretical basis for desertification control and scientific management of the Baijitan nature reserve.

于双;李小伟;王瑞霞;杨君珑;马龙

宁夏大学林业与草业学院,宁夏 银川 750021宁夏大学林业与草业学院,宁夏 银川 750021||宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培养基地,宁夏 银川 750021宁夏灵武白芨滩国家级自然保护区管理局,宁夏 灵武 750400

白芨滩自然保护区林下植被排序演替序列环境因子

Baijitan nature reserveunderstory vegetationordinationsuccession sequenceenvironmental factors

《草业学报》 2024 (003)

13-23 / 11

宁夏自然科学基金(2022AAC03080),宁夏高等学校一流学科建设(草学学科)资助项目(NXYLXK2017A01)和宁夏草原监测项目(2023)资助.

10.11686/cyxb2023150

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