毛乌素沙地不同人工林林下植物多样性及其与土壤理化性质的关系  

Understory Plant Diversity and Its Relationship with Soil Physicochemical Properties in Differen

作　　者：胡尔查[1,2,3] 王铮 李梓豪 李卓凡 董大伟[1] 宝虎 高润红 HU Er-cha;WANG Zheng;LI Zi-hao;LI Zhuo-fan;DONG Da-wei;BAO Hu;GAO Run-hong(Inner Mongolia Academy of Forestry Science,Hohhot 010010,Inner Mongolia,China;Daqing Mountains Forest Ecosystem Research Station,Inner Mongolia,Hohhot 010010,Inner Mongolia,China;College of Forestry,Inner Mongolia Agricultural University,Hohhot 010019,Inner Mongolia,China;Tongliao Forestry and Grassland Research Institute,Tongliao 028005,Inner Mongolia,China)

机构地区：[1]内蒙古自治区林业科学研究院,内蒙古呼和浩特010010 [2]内蒙古大青山森林生态系统国家定位观测研究站,内蒙古呼和浩特010010 [3]内蒙古农业大学林学院,内蒙古呼和浩特010019 [4]通辽市林业和草原研究所,内蒙古通辽028005

出　　处：《林业科学研究》2024年第4期174-181,共8页Forest Research

基　　金：内蒙古自然科学基金(2024LHMS03026);内蒙古自治区林业科学研究院2024年科研能力提升“揭榜挂帅”项目(2024NLTS01);内蒙古自治区科技兴蒙行动重点专项(KJXM-EEDS-2022003)。

摘　　要：[目的]研究不同人工林林下植物多样性特征及与土壤理化性质的关系,为探寻科学合理的沙地生态修复模式及近自然植被重建提供理论依据。[方法]以毛乌素沙地4种典型人工林(Ⅰ:樟子松人工林;Ⅱ:杨树人工林;Ⅲ:沙柳人工林;Ⅳ:小叶锦鸡儿人工林)为研究对象,分析不同人工林林下草本群落物种多样性及表层土壤理化性质,并进一步探讨二者间的关系。[结果]4种人工林林下草本植物种类由多到少依次为小叶锦鸡儿人工林>樟子松人工林>杨树人工林>沙柳人工林,其中,菊科、禾本科、豆科植物种类较多,占总植物种类的65.39%。4种人工林林下草本层Margalef丰富度指数(D)、Shannon-Wiener多样性指数(H)、Simpson优势度指数(H′)、Pielou均匀度指数(J)之间均无显著差异。不同人工林表层土壤pH值、有机质、有效磷、水解性氮和颗粒组成存在显著差异,樟子松人工林土壤pH值显著低于其他3种人工林,乔木林土壤有机质、水解性氮含量高于灌木林,灌木林土壤有效磷含量比乔木林高,4种人工林土壤速效钾含量无显著差异。影响林下草本植物多样性的土壤因子为有机质、有效磷、pH、水解性氮以及粒度成分。[结论]毛乌素沙地不同人工林林下植物组成和土壤理化性质具有差异,不同人工林对林下植物多样性无显著影响,有机质、有效磷、pH、水解性氮为影响人工林林下植物多样性的主要土壤因子。[Objective]The diversity characteristics of understory plants in different plantations and their relationship with soil physical and chemical properties were studied to provide theoretical basis for exploring scientific and reasonable ecological restoration mode of sandy land and near-natural vegetation reconstruction.[Methods]In this study,based on four kinds of plantations(Ⅰ:Pinus sylvestris plantation;Ⅱ:Poplar plantation;Ⅲ:Salix psammophila plantation;Ⅳ:Caragana microphylla plantation),the species diversity of understory herb communities and the physical and chemical properties of surface soil in different plantations were analyzed,and also their relationships were explored.[Results]The results showed that the species of understory herbaceous plants in Caragana microphylla plantation were the highest,followed by Pinus sylvestris plantation,Populus plantation,and Salix psammophila plantation.There were many species of Asteraceae,Gramineae and Leguminosae,accounting for 65.39%of the total plant species.There were no significant differences in Shannon-Wiener diversity index,Margalef richness index,Pielou evenness index and Simpson dominance index among the four plantations.However,there were significant differences in soil pH value,organic matter,available phosphorus,hydrolyzable nitrogen and particle composition among different plantations.The soil pH value of Pinus sylvestris plantation was significantly lower than that of the other three plantations.The contents of organic matter and hydrolyzable nitrogen in arbor forest were higher than those in shrub forest,while the content of available phosphorus was higher in shrub forest.There was no significant difference in soil available potassium content among different plantations.There were significant differences in soil pH value,organic matter,available phosphorus,hydrolyzable nitrogen and particle composition among different plantations.The soil pH value of Pinus sylvestris plantation was significantly lower than that of the other three plantations,and t

关 键 词：人工林 林下植被 植物多样性 土壤理化性质 毛乌素沙地 

分 类 号：S718.5[农业科学—林学]