生物土壤结皮发育对砂蓝刺头功能性状和生物量分配的影响  

Effect of Biological Soil Crusts Development on Functional Traits and Biomass Allocation of Echinops gmelinii Turcz

作　　者：张娜 王顺霞 王培源 杨昊天 Zhang Na;Wang Shunxia;Wang Peiyuan;Yang Haotian(Institute of Desertification Control,Ningxia Academy of Agriculture and Forestry Sciences,Yinchuan,Ningxia 750002;College of Forestry and Grassland,Ningxia University,Yinchuan,Ningxia 750002;Ningxia and Inner Mongolia Bureau of Hydrology and Water Resources,Yellow River Conservancy Commission,Baotou,Inner Mongolia 014030;Northwest Institute of Eco-environment and Resources,Chinese Academy of Sciences,Lanzhou,Gansu 730000)

机构地区：[1]宁夏回族自治区草原工作站,宁夏银川750002 [2]宁夏大学林业与草业学院,宁夏银川750021 [3]黄河水利委员会宁蒙水文水资源局,内蒙古包头014030 [4]中国科学院西北生态环境资源研究院,甘肃兰州730000

出　　处：《宁夏农林科技》2024年第7期19-27,共9页Journal of Ningxia Agriculture and Forestry Science and Technology

基　　金：宁夏回族自治区重点研发计划项目(2023BEG02040、2022CMG03049、2023BCF01019);宁夏回族自治区农业科技自主创新资金项目(NGSB-2021-14-04)。

摘　　要：生物土壤结皮(BSCs)是荒漠生态系统的重要组成部分,其发育和演替对植物生长繁殖和生态系统稳定性、物种多样性等具有不可忽略的作用。通过对不同发育阶段BSCs样地中砂蓝刺头功能性状和生物量分配特征的调查分析,结合土壤理化性质探讨研究BSCs发育对砂蓝刺头形态塑造和生物量分配策略的影响。结果表明,随着BSCs发育和演替,BSCs盖度和厚度逐渐增加,表层土壤(0~20cm)理化性质和养分状况显著改善;砂蓝刺头株高、花序数、根长、叶宽、叶面积呈逐渐减小趋势,而花序面积则呈逐渐增加趋势;砂蓝刺头总生物量和各构件生物量呈逐渐减少趋势,花生物量比例和茎生物量比例呈增加趋势。相关性分析和冗余分析表明,砂蓝刺头功能形状和生物量分配变异与土壤理化性质密切相关,BSCs发育和演替引起土壤理化性质和养分变化,进而影响砂蓝刺头生长和繁殖策略的变化。研究结果以期为理解固沙植被区BSCs发育和演替对植物群落多样性、生态系统稳定性、植被演替过程提供一定科学依据。Biological soil crust(BSCs)is an important component of desert ecosystem,and its development and succession play an important role in plant growth and reproduction,ecosystem stability and species diversity.The effects of BSCs development on the morphology and biomass allocation strategies of Echinops gmelinii Turcz.were studied on the basis of an investigation and analysis of the functional traits and biomass allocation characteristics of E.gmelinii.in BSCs samples at different developmental stages,in combination with soil physicochemical properties.The results showed that with the development and succession of BSCs,the coverage and thickness of BSCs gradually increased,and the physicochemical properties and nutrient status of topsoil(0-20 cm)were significantly improved.The plant height,number of inflorescences,root length,leaf width and leaf area of E.gmelinii.decreased gradually,while the inflorescence area increased gradually.The total biomass and the biomass of each component of E.gmelinii.showed a decreasing trend,while the proportion of flower biomass and stem biomass showed an increasing trend.Correlation analysis and redundancy analysis showed that the variation of functional shape and biomass allocation of E.gmelinii.were closely related to soil physicochemical properties,and the development and succession of BSCs caused changes in soil physicochemical properties and nutrients,which further affected the growth and reproductive strategies of E.gmelinii.The results of this study are expected to provide a scientific basis for understanding the effects of BSCs development and succession on plant community diversity,ecosystem stability and vegetation succession in sand-fixing vegetation areas.

关 键 词：生物土壤结皮 构件生物量 分配策略 功能性状 砂蓝刺头 

分 类 号：S154[农业科学—土壤学] S567.219[农业科学—农业基础科学] Q948[生物学—植物学]