伊犁河谷不同入侵程度意大利苍耳各器官的生态化学计量特征  

The stoichiometric characteristics of Xanthium italicum with different invasive degrees in the Yili valley

作　　者：刘璇 崔东 刘文新 赵阳 依里帆·艾克拜尔江 吕丽琴 武玉鑫 江智诚 闫江超 李金哥 LIU Xuan;CUI Dong;LIU Wenxin;ZHAO Yang;Erfan·Akberjan;LYU Liqin;WU Yuxin;JIANG Zhicheng;YAN Jiangchao;LI Jin’ge(School of Resources and Environment,Institute of Resources and Ecology,Yili Normal University,Yili Normal University,Yining 835000,Xinjiang,China;Xinjiang Administration of the West Tianshan National Nature Reserve,Yining 835000,Xinjiang,China;Xinjiang West Tianshan Forest Ecosystem National Positioning Observation and Research Station,Gongliu 835400,Xinjiang,China)

机构地区：[1]伊犁师范大学资源与环境学院/资源与生态研究所,新疆伊宁835000 [2]新疆西天山国家级自然保护区管理局,新疆伊宁835000 [3]新疆西天山森林生态系统国家定位观测研究站,新疆巩留835400

出　　处：《草业科学》2024年第11期2553-2563,共11页Pratacultural Science

基　　金：第三次新疆综合科学考察项目(2022xjkk0405);伊犁师范大学科研创新团队培育计划项目(CXZK2021007)。

摘　　要：为探讨意大利苍耳(Xanthium italicum)在不同入侵程度下的养分动态变化规律,本研究以意大利苍耳为研究对象,分析不同入侵程度其根茎叶碳(C)、氮(N)、磷(P)、钾(K)的含量及其比值的化学计量特征。结果显示:1)不同入侵程度下意大利苍耳的C、N、P、K及化学计量比之间存在差异,入侵强度越高时,意大利苍耳植株的生长速率越高。2)意大利苍耳在入侵过程中通过化学元素的分配与利用,加快吸收养分且提高了生长速率,进而增加了与当地植物的竞争力,促进了意大利苍耳对当地生态系统的入侵。3)N和P在意大利苍耳生长发育阶段发挥着重要的作用,体现了根茎叶在对营养养分分配利用和贮存的协同性;C、N、P、K是植物各器官在生长发育过程中缺一不可的元素,各器官的生长发育同时也受相同元素的限制。本研究从化学计量角度反映了意大利苍耳的入侵机制、入侵强度及危害,为治理意大利苍耳的入侵提供了防控思路。To explore the stoichiometric characteristics of the contents and ratios of C,N,P,and K in the root,leaf,and stem of Xanthium italicum under different invasion levels.The results showed that:1)The C,N,P,and K stoichiometric ratios of X.italiana were different under different invasion degrees.The higher the invasion intensity,the higher the growth rate of X.italiana.2)The distribution and utilization of chemical elements during the invasion process accelerated the absorption of nutrients and increased the growth rate of X.italiana,thus increasing its competitiveness against local plants and promoting its invasion of local ecosystems.3)N and P play an important role in the growth and development stage of X.italiana,reflecting the synergism of roots,stems,and leaves in nutrient distribution,utilization,and storage.C,N,P,and K are indispensable elements for the growth and development of plant organs,and the growth and development of various organs are restricted by these elements.This study showed the invasion mechanism,intensity,and harm of X.italiana from the perspective of stoichiometry and provides prevention and ideas for controlling the invasion of this species.

关 键 词：生态化学计量学 植物入侵 入侵机制 养分元素 生态系统 

分 类 号：S812.6[农业科学—草业科学]