太行山坡地不同管理措施植被-土壤系统耦合关系  

Evaluation of the coupling relationship between vegetation and soil system under different management measures in Taihang Mountains

作　　者：郭文芳 李鑫[1] 陈艳梅[1] 刘倩愿 王佳乐 GUO Wenfang;LI Xin;CHEN Yanmei;LIU Qianyuan;WANG Jiale(College of Geographical Sciences,Hebei Normal University,Hebei Technology Innovation Center for Remote Sensing Identification of Environmental Change,Laboratory of Environmental Evolution and Ecological Construction of Hebei Province,Shijiazhuang 050024,China)

机构地区：[1]河北师范大学地理科学学院,河北省环境变化遥感识别技术创新中心,河北省环境演变与生态建设重点实验室,石家庄050024

出　　处：《生态学报》2023年第15期6170-6181,共12页Acta Ecologica Sinica

基　　金：国家重点研发计划项目(2021YFB3901104)。

摘　　要：植被和土壤的耦合协调关系可以用来衡量生态系统的一致性和协调性程度。研究以河北省临城县太行山东麓丘陵坡地为研究区,以原生灌草地、不管理的人工核桃林、人工核桃林下清除灌草、人工核桃林下清除灌草并施肥等4种不同管理措施的植被-土壤系统为研究对象,建立由4个植被因子(Shannon-Wiener、Simpson、Margalef、Pielou等指数)和7个土壤因子(土壤有机碳、全氮、全磷、全钾、pH、电导率、含水率等)组成的评价指标体系,采用层次分析法和熵权法确定各因子权重,以耦合协调度模型评价二者的协调程度。结果表明:(1)不同管理措施下,除植被因子Pielou指数外,其余植被和土壤因子均存在显著差异性(P<0.05)。(2)土壤有机碳与Simpson指数呈显著正相关(P<0.05),与Shannon-Wiener、Pielou、Margalef指数呈显著负相关(P<0.05),土壤全氮与Shannon-Wiener和Margalef指数呈显著负相关(P<0.05)。(3)不同管理措施下植被-土壤系统耦合协调程度总体处于失调发展状态,原生灌草地为严重失调发展模式的植被-土壤同步发展型,不管理的人工核桃林和林下清除灌草并施肥均属于中度失调发展模式的土壤滞后发展型,林下清除灌草属于轻度失调发展模式的植被滞后发展型。综上,种植人工核桃林并清除林下灌草有利于提升植被-土壤系统耦合协调度,但尚未达到最佳的协调状态。The coupling and coordination relationship between vegetation and soil can be used to measure the degree of coherence and coordination of the ecosystem.This study was conducted in the low hilly area at the eastern foot of the Taihang Mountains,Lincheng County,Hebei Province,taking four vegetation-soil systems with different managements as research objects,including native shrub-herbs land,unmanaged walnut plantation,walnut plantation with a removal of shrub-herbs,and walnut plantation with a removal of shrub-herbs and fertilization.The evaluation index system included four plant factors,i.e.,Shannon-Wiener,Simpson,Margalef,and Pielou index,and seven soil factors,i.e.,soil organic carbon,total nitrogen,total phosphorus,total potassium,pH,electrical conductivity,and water content.The weight value of each index was determined by an analytic hierarchy process and entropy method,and the model for the degree of coupling coordination between vegetation and soil was constructed.The results showed that:(1)under different managements,all the plant and soil factors were significantly different(P<0.05),except for the vegetation Pielou index.(2)Soil organic carbon was positively correlated with vegetation Simpson index(P<0.05),but negatively correlated with vegetation Shannon-Wiener,Pielou and Margalef indices(P<0.05).Soil total nitrogen was negatively correlated with vegetation Shannon-Wiener and Margalef indices(P<0.05).(3)The coordination degree of the vegetation-soil system under different managements was generally in a dysfunctional developmental state.The native shrub-herbs land was severely dysfunctional of synchronous vegetation-soil development.Unmanaged walnut plantation and the walnut plantation with a removal of shrub-herbs and fertilization belonged to the soil lagged behind vegetation development type of the moderately dysfunctional developmental pattern.The walnut plantation with a removal of shrub-herbs belonged to the vegetation lagged behind soil development type of the mildly dysfunctional developmental pat

关 键 词：太行山坡地 管理措施 植被-土壤系统 耦合协调 

分 类 号：Q948.113[生物学—植物学]