武夷山不同海拔蕨类植物细根碳氮磷化学计量特征  

Stoichiometric characteristics of carbon,nitrogen,and phosphorus in fine roots of ferns along elevation gradients in the Wuyi Mountains

作　　者：郭嘉恒 武盼盼 李雪琴 陈姝冰 陈小芳 钟全林[1,2] 胡丹丹 程栋梁 邹志安[4] GUO Jiaheng;WU Panpan;LI Xueqin;CHEN Shubing;CHEN Xiaofang;ZHONGQuanlin;HU Dandan;CHENG Dongliang;ZOU Zhi’an(Institute of Geography,Fujian Normal University,Fuzhou 350007,China;Fujian Provincial Key Laboratory of Plant Ecophysiology,Fujian Normal University,Fuzhou 350007,China;Key Laboratory of Eco-Geographic Processes of Humid Subtropical Tropics,Fujian Normal University,Fuzhou 350007,China;Administrative Bureau of Jiangxi Wuyishan National Nature Reserve,Shangrao 334515,China)

机构地区：[1]福建师范大学地理研究所,福州350007 [2]福建省植物生理生态重点实验室,福州350007 [3]福建师范大学湿润亚热带生态-地理过程教育部重点实验室,福州350007 [4]江西武夷山国家级自然保护区管理局,上饶334515

出　　处：《应用与环境生物学报》2024年第1期98-104,共7页Chinese Journal of Applied and Environmental Biology

基　　金：国家自然科学基金项目(32001294、32071555、31971643);福建省科技厅公益性重点项目(2022R1002002)资助。

摘　　要：植物细根的化学计量特征可以表征植物对外部环境的适应策略,蕨类植物作为地球上最古老的植物类群之一,对其细根化学计量研究有助于揭示植物对环境的适应策略.以武夷山不同海拔蕨类植物细根为研究对象,分析其细根的全碳、全氮和全磷化学计量特征沿海拔梯度的变化特征,及其对土壤元素含量的响应模式,结果显示:(1)蕨类植物细根碳、氮、磷平均含量分别为417.92±21.61 mg/g、8.73±3.43 mg/g和1.25±0.51 mg/g,细根碳氮比、碳磷比和氮磷比分别为65.43±41.48、415.74±256.71和8.23±5.59.(2)蕨类植物细根磷含量随海拔升高而降低,碳磷比随海拔升高而升高.(3)蕨类植物细根碳磷比与土壤碳含量、土壤碳氮比及土壤碳磷比均显著正相关,细根磷含量与土壤碳氮比呈显著的负相关关系.研究表明蕨类植物细根化学计量特征在不同海拔上存在显著差异,且与土壤元素含量存在显著相关关系,并且蕨类植物具有较低的营养需求和相对简单的资源获取策略,采取了简化组织结构、快速生长繁殖的环境适应策略.(图3表4参44)The stoichiometry of fine roots reflects the adaptive strategies of plants to the environment.Examining the stoichiometry of fine roots in ferns,one of the oldest plant groups,provides valuable insights into the adaptive strategies of plants to their environment.We collected fine roots of ferns at various altitudes in the Wuyi Mountains of China and analyzed the stoichiometric changes in carbon(C),nitrogen(N),and phosphorus(P)and their responses to soil physicochemical properties.The fine roots of ferns exhibited average contents(all mg/g)of 417.92±21.61 for C,8.73±3.43 for N,and 1.25±0.51 for P.Furthermore,the C/N,C/P,and N/P ratios of the fine roots of ferns were 65.43±41.48,415.74±256.71,and 8.23±5.59 respectively.As the altitude gradient increased,the P content in the fine roots of ferns decreased,while the C/P ratio increased.This ratio was significantly positively correlated with the C content,C/N ratio,and C/P ratio of the soil.Conversely,the P content of fine roots was significantly negatively correlated with the soil C/N ratio.The stoichiometry of fern fine roots was significantly different across elevational gradients and was correlated with soil physicochemical properties.Ferns adopt an environmental adaptation strategy of simplifying their organizational structure and rapid growth and reproduction because of their low nutrient requirements and relatively simple resource acquisition strategies.

关 键 词：蕨类植物 细根 化学计量特征 海拔梯度 环境适应 

分 类 号：Q948[生物学—植物学]