摘要
以北京平原造林工程营建的城市森林为研究对象,对不同群落类型的林下植物多样性、土壤理化性质、林下植物多样性与土壤因子的相关性进行研究。结果表明:阔叶混交林的Shannon-Wiener多样性指数、Pielou均匀度指数、Simpson优势度指数、Margalef丰富度指数均显著高于其他群落类型(P<0.05)。除土壤pH外,不同群落类型的土壤理化指标均存在显著差异(P<0.05),其中,阔叶混交林的土壤理化指数均优于其他群落类型。所有群落类型的土壤理化性质随土层深度的增加呈规律性变化,即土壤pH、土壤密度、土壤含水量呈上升趋势,土壤总孔隙度、有机碳、有机质、全氮、全磷、有效磷、速效钾则呈下降趋势。相关性研究表明,0<h≤20 cm土层的土壤理化性质对林下植物的多样性影响最高,其中,土壤有机质、有机碳是影响林下植物Shannon-Wiener多样性指数、Pielou均匀度指数、Simpson优势度指数、Margalef丰富度指数的主要因素,土壤全氮、全磷、速效钾也对林下植物的Shannon-Wiener多样性指数、Margalef丰富度有一定影响。城市森林群落应注重营造复合群落类型,适当保留林地内的凋落物,提高土壤有机质质量分数,使其与土壤形成良好的协同效应,进而维持城市森林林下植物多样性的稳定。
In order to reveal the response mechanism of understory plant diversity to soil factors in urban forests,the understory plant diversity and soil physicochemical properties of different community types were comparatively analyzed,and the correlation between understory plant diversity and soil factors was studied from urban forests established by the Beijing Plain Afforestation Project.The results showed that the Shannon-Wiener index,Pielou index,Simpson index and Margalef richness index of broad-leaved mixed forests were significantly higher than those of other community types(P<0.05).Except for soil pH,the soil physicochemical indices of different community types were significantly different(P<0.05),among which,the soil physicochemical indices of broad-leaved mixed forests were all better than those of other community types.With the deepening of soil depth,the soil physicochemical properties of all community types showed a regular trend with the change of soil depth,i.e.soil pH,soil density and soil water content showed an increasing trend,while total soil porosity,organic carbon,organic matter,total nitrogen,total phosphorus,effective phosphorus and fast-acting potassium showed a decreasing trend.The soil physical and chemical properties of the 0<h≤20 cm soil layer had the highest influence on the diversity of understory plants,among which,soil organic matter and organic carbon were the main factors affecting the Shannon-Wiener index,Pielou index,Simpson index,and Margalef richness index of understory plants,and soil total nitrogen,total phosphorus,and fast-acting potassium also affected the Shannon-Wiener index,Pielou index,Simpson index,and Margalef richness index of understory plants.The Shannon-Wiener index and Margalef richness of understory plants are also affected by total soil N,total phosphorus and fast-acting potassium.The community creation in urban forests should focus on creating a composite community type,appropriately retaining the dead material in the forest floor,and improving the organic matt
作者
孟祥玉
范舒欣
董丽
孔祥奕
王淼淼
李坤
王琬璐
Meng Xingyu;Fan Shuxin;Dong Li;Kong Xiangyi;Wang Miaomiao;Li Kun;Wang Wanlu(Beijing Forestry University,Beijing 100083,P.R.China;Beijing Jicheng Zhizao Technology Co.)
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2023年第7期102-114,共13页
Journal of Northeast Forestry University
基金
国家自然科学基金项目(32171860)
北京市西城区财政科技专项项目(XCSTS-SD2021-09)。
关键词
城市森林
植物多样性
土壤理化性质
Urban forest
Plant diversity
Soil physicochemical properties
