不同演替阶段白刺灌丛沙堆土壤因子与叶功能性状关系研究  

Relationship between soil factors and leaf functional traits of Nitraria tangutorum shrub at different succession stages

作　　者：王飞[1,2] 郭树江 纪永福[1,3] 张莹花 韩福贵[1,2] 张裕年 张卫星[1] 宋达成[1] WANG Fei;GUO Shujiang;JI Yongfu;ZHANG Yinghua;HAN Fugui;ZHANG Yunian;ZHANG Weixing;SONG Dacheng(Gansu Desert Control Resesrch Institiute,Lanzhou 730070,Gansu,China;State Key Laboratory Breeding Base of Desertification and Aeolian Sand Disaster Combating,Wuwei 733000,Gansu,China;Gansu Minqin National Studies Station for Desert Steppe Ecosystem,Minqin 733300,Gansu,China)

机构地区：[1]甘肃省治沙研究所,甘肃兰州730070 [2]甘肃省荒漠化与风沙灾害防治国家重点实验室(培育基地),甘肃武威733000 [3]甘肃民勤荒漠草地生态系统国家野外科学观测研究站,甘肃民勤733300

出　　处：《干旱区地理》2022年第1期176-184,共9页Arid Land Geography

基　　金：甘肃省青年科技基金计划项目(20JR10RA469);国家青年科学基金项目(31700339);国家自然科学基金项目(31760238,31860116,31960334);甘肃省自然科学基金项目(20JR5RA096);中国科学院“西部之光”项目资助。

摘　　要：植物功能性状与环境之间的关系是功能性状研究的重点,环境因子驱使植物功能性状发生变化,进而推动群落发生演替。本研究以民勤不同演替阶段(发育阶段、稳定阶段、衰退阶段、严重衰退阶段)白刺(Nitraria tangutorum)灌丛沙堆为研究对象,分析不同演替阶段白刺叶功能性状差异及其与土壤因子的关系,旨在揭示白刺对干旱荒漠区土壤环境的适应策略。结果表明:(1)不同演替阶段白刺叶厚度、叶干物质含量、叶全磷含量差异显著(P<0.05),其他的叶功能性状差异不显著(P>0.05)。白刺叶功能性状变异范围是0.39%~11.99%,均表现为弱变异,其中比叶面积最大(11.99%),叶全碳含量最小(0.39%)。(2)白刺叶功能性状间存在一定的相关性;叶厚度、叶干物质含量、叶全氮含量可作为白刺叶功能性状变化的主要指标。(3)除pH外,白刺灌丛沙堆土壤因子随退化程度的增加表现为先增加后降低的趋势,最小值出现在发育阶段,最大值出现在衰退阶段。土壤速效磷含量与全氮含量是影响白刺叶功能性状变化的主要土壤因子。上述研究结果深化了对白刺灌丛沙堆演替的认识,为荒漠生态系统恢复与保护提供重要参考依据。The relationship between plant functional traits and the environment was the focus of functional traits research.Environmental factors drive the changes in plant functional traits,which in turn promote community succession.This study took Nitraria tangutorum shrubs at different succession stages(development stage,stable stage,decline stage,and severe recession phase)in Minqin County,Wuwei City,Gansu Province of China as the research objects and analyzed the differences in leaf functional traits and their relationships with soil factors,aiming to reveal the adaptation strategy of N.tangutorum to the arid desert soil environment.The results showed that:(1)There were significant differences in leaf thickness,leaf dry material content,and total phosphorus content among different succession stages(P<0.05),but no significant differences in other leaf functional traits(P>0.05).The variation range of leaf functional traits of N.tangutorum was 0.39%-11.99%,all showing weak variation,among which specific leaf area was the largest(11.99%)and total carbon content was the smallest(0.39%).(2)There was a certain correlation between the leaf functional traits of N.tangutorum.Leaf thickness,leaf dry material content,and leaf total nitrogen content,which could be used as the main index of leaf functional traits of N.tangutorum.(3)Except for pH,the soil factors of the N.tangutorum shrub increased first and then decreased as the degradation degree increased,and the minimum value appeared in the development stage while the maximum value appeared in the decline stage.The main soil factors affecting the leaf functional traits of N.tangutorum were soil available phosphorus and total nitrogen.The studies deepen our understanding of the succession of N.tangutorum shrubs and provide an important reference for restoring and protecting the desert ecosystem.

关 键 词：白刺 叶功能性状 土壤因子 演替阶段 民勤县 

分 类 号：S793.9[农业科学—林木遗传育种]