摘要
为了研究芦苇在黄河三角洲潮水和淡水两种生境条件下的生长差异,特别是根系生态特征差异,分别在潮水区和淡水区选取长势均匀的芦苇群落,测量不同土层电导率、pH值,芦苇株高、密度、茎叶及不同土层主根、须根生物量、离子含量等指标。结果表明,两个区域的表层土壤(0-10 cm)电导率均大于下层土壤,并在20-30 cm土层处电导率测得最小值,而在更深的土壤呈现出随土层深度增加,电导率上升、pH值下降的趋势。潮水区芦苇的平均株密度和株高分别为(20.80±5.93)株·m^(-2),(35.70±16.01)cm,淡水区芦苇的平均株密度和株高分别为(309.60±39.15)株·m^(-2),(91.48±13.09)cm。在生物量分配上,潮水区芦苇的主根、须根、茎、叶生物量分配比例分别是79.70%、11.88%、6.79%和1.64%,而淡水区芦苇在这四个部位生物量分配比例分别是66.77%、8.76%、18.54%和5.92%。淡水区芦苇主根生物量主要集中在0-30 cm土层,须根生物量主要集中在0-10 cm土层(68.18±38.99)g·m^(-2);潮水区芦苇主根生物量主要集中在20-30 cm土层(146.57±109.94)g·m^(-2)。离子含量结果表明,潮水区芦苇主根平均Na+和K+含量分别为(6.38±1.56)mg·g^(-1)和(1.08±0.17)mg·g^(-1),并且Na+与Cl-分布呈极显著正相关(P<0.01)。淡水区芦苇主根这两种离子平均含量分别为(2.82±0.56)mg·g^(-1)和(3.93±1.10)mg·g^(-1)。以上结果表明芦苇能够改变株高、密度、各部位生物量分配比例以及离子分布来适应不同水盐环境,这也是芦苇能够在高盐环境下长期生存的适应机制。
In order to study the growth differences of Phragmites australis,especially the differences of root ecological characteristics,between the tidal and fresh water habitats of the Yellow River Delta,two typical habitats of P.australis in tidal and fresh water habitats were chosen,and the electrical conductivity(EC)and pH of different soil layers were measured;the height,density,biomass of stem,leaf,main and fibrous root and ion content in different soil layers of P.australis were also analyzed.The results showed that the EC of surface soil(0-10 cm)was higher than that of the lower soil in both habitats and the minimum EC was tested in 20-30 cm soil layer.However,with the increase of soil depth deeper than 20-30 cm,the EC value increased and the pH decreased.The mean density and height of P.australis were(20.80±5.93)stem·m^(-2) and(35.70±16.01)cm in tidal area,(309.60±39.15)stem·m^(-2) and(91.48±13.09)cm in fresh water habitat,separately.In terms of biomass allocation,the proportion of the main root,fibrous root,stem and leaf of P.australis in tidal and fresh water habitats were 79.70%,11.88%,6.79%,1.64%and 66.77%,8.76%,18.54%,5.92%,respectively.The main and fibrous root biomass of P.australis in fresh water habitat was mainly concentrated in 0-30 cm and 0-10 cm(68.18±38.99)g·m^(-2) soil layer,respectively.And the main root biomass of P.australis in tidal water area was mainly concentrated in 20-30cm(146.57±109.94)g·m^(-2) soil layer.After analyzing the ion content of roots in two habitats,we found the average content of Na+and K+in the main root of P.australis from tidal water habitat were(6.38±1.56)mg·g^(-1) and(1.08±0.17)mg·g^(-1) respectively,and the distribution of Na+and Cl-had a significantly positive correction(P<0.01).The average contents of these two ions in the main root of P.australis in fresh water habitat were(2.82±0.56)mg·g^(-1) and(3.93±1.10)mg·g^(-1) respectively.The results show that P.australis can adjust the height,density and biomass allocation of different organs and the distri
作者
田晓燕
高楠
陆冠茹
杨锦媚
路峰
于君宝
王雪宏
管博
TIAN Xiaoyan;GAO Nan;LU Guanru;YANG Jinmei;LU Feng;YU Junbao;WANG Xuehong;GUAN Bo(School of Municipal and Environmental Engineering,Jilin Jianzhu University,Changchun 130118,China;CAS Key Laboratory of Coastal Environmental Process and Ecological Remediation,Yantai Institute of Coastal Zone Research(YIC),Chinese Academy of Science(CAS),Shandong Key Laboratory of Coastal Environmental Processes,YICCAS,Yantai 264003,China;School of Resource and Environmental Engineering,Henan Polytechnic University,Jiaozuo 454000,China;Management Committee of Shandong Yellow River Delta National Nature Reserve,Dongying 257091,China;The Institute for Advanced Study of Coastal Ecology,Ludong University,Yantai 264025,China)
出处
《生态科学》
CSCD
2021年第2期1-8,共8页
Ecological Science
基金
国家自然科学基金项目(41871091)
国家自然科学基金山东联合基金重点支持项目(U1806218)
国家重点研发计划项目(2017YFC0505901)。
关键词
芦苇
潮水生境
淡水生境
电导率
生物量
Phragmites australis
tidal water habitat
fresh water habitat
electrical conductivity
biomass
