扎龙湿地植物群落演替过程中芦苇种群根茎长度和生物量动态研究  

Rhizome Length and Biomass Dynamics of Phragmites australis Population during Plant Community Succession in ZhalongWetlands

作　　者：焦德志[1] 杨建霄 王昱深 钟露朋 JIAO Dezhi;YANG Jianxiao;WANG Yushen;ZHONG Lupeng(Key Laboratory of Resistance Gene Engineering and Preservation of Biodiversity in Cold Areas in Heilongjiang Province,College of Life Science and Agriculture and Forestry,Qiqihar University,Qiqihar 161006,Heilongjiang,P.R.China)

机构地区：[1]齐齐哈尔大学生命科学与农林学院,抗性基因工程与寒地生物多样性保护黑龙江省重点实验室,黑龙江齐齐哈尔161006

出　　处：《湿地科学》2023年第4期493-500,共8页Wetland Science

基　　金：黑龙江省省属高等学校基本科研业务费科研项目(145209321)资助。

摘　　要：根茎既是芦苇(Phragmites australis)的营养繁殖器官,又是其养分贮藏器官。为了明确扎龙湿地植物群落演替过程中芦苇种群根茎生长和养分贮藏的规律,采用“空间代替时间”的方法,在理论上的演替早期、中期和晚期的植物群落区布设采样地,于2019年5月至10月期间,采集芦苇种群根茎和土壤样品;采用单因素方差分析方法,分析各植物群落区芦苇种群根茎长度值、生物量值之间的差异;采用相关分析方法,分析芦苇种群根茎长度值、生物量值与土壤理化指标值之间的关系。研究结果表明,以扎龙湿地中的羊草(Leymus chinensis)+芦苇群落、芦苇+羊草群落、芦苇群落分别代表该湿地植物群落演替早期、中期、晚期的植物群落,在植物的完整生长季中,其单位体积芦苇种群根茎的累积长度值在不断增大,芦苇种群根茎的生物量值呈单谷型变化,体现出芦苇种群克隆繁殖的遗传学特性;芦苇群落区土壤的含水量、各种养分含量、盐碱化程度都明显优于羊草+芦苇群落区和芦苇+羊草群落区,这种土壤环境抑制了中旱生植物羊草等的生长和繁殖,促进了湿生植物芦苇的生长和繁殖,土壤环境更适宜芦苇群落的生存;扎龙湿地长效补水机制的建立和实施有利于退化湿地的自然恢复。The rhizome of Phragmites australis is not only the vegetative reproductive organ,but also the nutrient storage organ.In order to clarify the rule of rhizomatous growth and nutrient storage of Phragmites australis population during plant community succession in Zhalong wetlands,the method of'Space replacing time'was adopted to set up sampling plots in the theoretical early,middle and late succession plant communities.During May to October in 2019,the samples of Phragmites australis rhizomes and soil were collected from Phragmites australis populations to analyze the differences of the values of Phragmites australis population rhizomes length and biomass in different plant communities by one-way anova analysis method,and the relationships between rhizomes length value of Phragmites australis population,biomass value and soil physical and chemical index values were analyzed by correlation analysis method.The results showed that the Leymus chinensis+Phragmites australis community,Phragmites australis+Leymus chinensis community and Phragmites australis community in Zhalong wetlands represented the plant communities in the early,middle and late stages of plant community succession,respectively.During the whole growing season of the plants,the cumulative length of Phragmites australis population rhizomes per unit volume increased continuously,and the biomass of Phragmites australis rhizomes varied in a single-valley pattern,which reflected the genetic characteristics of clonal propagation of Phragmites australis population.The soil moisture,all kinds of nutrient contents and salinization degree of Phragmites australis community were obviously superior to Leymus chinensis+Phragmites australis community and Phragmites australis+Leymus chinensis community,this kind of soil environment inhibited the growth and reproduction of the mid-xerophyte Leymus chinensis and promoted the growth and reproduction of the wet plant Phragmites australis.The establishment and implementation of long-term water recharge mechanism in Zhalong

关 键 词：芦苇种群 根茎 生物量 土壤 扎龙湿地 

分 类 号：Q948.1[生物学—植物学]