摘要
[目的]为探究不同林分类型草本多样性与土壤理化性质相互关系的差异。[方法]以晋西北黄土区油松纯林、小叶杨纯林、油松小叶杨混交林、小叶杨柠条混交林4种典型人工林为研究对象,分析不同林分类型草本多样性与土壤理化性质差异,并研究其相互关系。[结果]1)研究区内林下草本共计12科30属35种,优势种以禾本科为主,4种典型人工林Simpson多样性指数、Pielou均匀度指数和Margalef丰富度指数均存在显著差异(p<0.05),且小叶杨柠条混交林水平最高。2)4种典型人工林土壤理化性质也存在显著差异(p<0.05),其中小叶杨纯林与小叶杨柠条混交林土壤理化性质最优。3)相关性分析和冗余分析表明,不同林分类型中,土壤全磷和土壤水分体积分数对草本多样性影响存在差异,土壤水分体积分数在油松纯林中与草本多样性呈显著负相关(p<0.05),在混交林中与草本多样性呈显著正相关(p<0.05);土壤全磷在油松纯林和小叶杨柠条混交林中与草本多样性呈显著正相关(p<0.05),在小叶杨纯林与小叶杨油松混交林中呈负相关。[结论]土壤全磷和土壤水分体积分数是影响草本多样性的主要因素,研究结果对晋西北黄土区林下草本生态功能和土壤性质研究具有重要意义。
[Objective]To explore the differences in the relationship between herbaceous diversity and soil physicochemical properties of different stand types,[Methods]Four typical plantations in the loess region of northwestern Shanxi Province,including Pinus tabuliformis pure plantation,Populus microphylla pure plantation,P.tabuliformis and P.microphylla mixed plantation,and P.microphylla and Caragana korshinskii mixed plantation,were studied to analyze the differences in herbaceous diversity and soil physicochemical properties among different stand types,and to study their correlations.[Results]1)There were 35 species of understory herbs in 12 families and 30 genera in the study area,and the dominant species were Poaceae.There were significant differences in the Simpson diversity index,Pielou evenness index,and Margalef richness index among the four typical plantations(p<0.05),with the P.microphylla and C.korshinskii mixed plantation showing the highest values.2)There were also significant differences in soil physicochemical properties among the four typical plantations(p<0.05),with the P.microphylla pure plantation and the P.microphylla and C.korshinskii mixed plantation exhibiting the best soil properties.3)Correlation analysis and redundancy analysis showed that there were differences in the effects of soil total phosphorus and soil water content on herbaceous diversity among different stand types.Soil water content was negatively correlated with herbaceous diversity in P.tabuliformis pure plantation(p<0.05),but positively correlated with herbaceous diversity in mixed forest(p<0.05).Soil total phosphorus was significantly positively correlated with herbaceous diversity in P.tabuliformis pure plantation,and in P.microphylla and C.korshinskii mixed plantation(p<0.05),and negatively correlated with herbaceous diversity in P.microphylla pure plantation,and in P.tabuliformis and P.microphylla mixed plantation.[Conclusion]Soil total phosphorus and soil water content are the main factors affecting herbaceous diversity.The results of this study are of great significance for understanding the ecological functions of understory herbaceous plants and soil properties in the loess region of northwestern Shanxi Province.
作者
余锦亚南
张杰铭
宁晓梅
李治学
范明远
崔悦
闫冰
常晓敏
孙立博
YU Jinyanan;ZHANG Jieming;NING Xiaomei;LI Zhixue;FAN Mingyuan;CUI Yue;YAN Bing;CHANG Xiaomin;SUN Libo(College of Forestry,Shanxi Agricultural University,Taigu,Shanxi 030801,China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing Hydraulic Research Institute,Nanjing 210029,China;Institute of Loess Plateau Research,Shanxi University,Taiyuan 030000,China)
出处
《水土保持学报》
北大核心
2025年第4期158-167,共10页
Journal of Soil and Water Conservation
基金
国家自然科学基金青年基金项目(32201630)
山西省基础研究计划自由探索类项目(202203021212429,202203021222014)
山西农业大学“杰青优青培育工程”项目(2024YQPYGC06)
山西农业大学博士科研启动项目(2021BQ105)
山西省博士毕业生、博士后研究人员来晋工作奖励经费科研项目(SXBYKY2022052)
山西省回国留学人员科研项目(2023-017)。
关键词
晋西北黄土区
人工林
草本多样性
土壤理化性质
相关性
冗余分析
loess region in northwestern Shanxi Province
plantation
herbaceous diversity
soil physicochemical properties
correlation
redundancy analysis
作者简介
第一作者:余锦亚南(2002-),男,硕士研究生,主要从事水土保持与森林生态研究。E-mail:yujinyanan02@163.com;通信作者:常晓敏(1992-),女,副教授,博士,主要从事水土保持与森林生态研究。E-mail:changxiaomin123@126.com。
