摘要
以黄河三角洲芦苇(Phragmites australis)和盐地碱蓬(Suaeda salsa)的凋落物为研究对象,研究不同淹水条件下芦苇和盐地碱蓬凋落物的分解与重金属的归还特征。结果表明:两种淹水条件下,盐地碱蓬凋落物的失重率均高于芦苇凋落物;潮汐淹水条件下芦苇和盐地碱蓬凋落物的失重率均高于短暂淹水处理。在两种淹水条件下,经过分解后芦苇凋落物中As、Cr和Cu的含量增加,潮汐淹水条件下芦苇凋落物的各金属含量均高于短期淹水处理。盐地碱蓬凋落物经过分解后,各重金属含量总体上呈上升变化趋势,潮汐淹水条件下的盐地碱蓬凋落物中As、Cu和Pb的含量均高于短期淹水处理。两种淹水条件下芦苇和盐地碱蓬凋落物中的Pb和Zn,在分解期间均发生了不同程度的释放。研究结果有助于理解潮汐作用对黄河三角洲芦苇和盐地碱蓬凋落物分解和重金属归还的影响。
The remained litter mass,and the contents of As,Cr,Cu,Pb,and Zn in the litters of Phragmites australis and Suaeda salsa under different flooding conditions in the Yellow River Delta were determined to investigate the litter decomposition rates and heavy metal return characteristics.Results showed that the decomposition of S.salsa litters was significantly faster than that of P.australis litters(P<0.05),and the decomposition under tidal flooding conditions was faster than that under the short-term flooding conditions.In terms of P.australis litters,their contents of As,Cr and Cu were higher compared to the initials,and these heavy metals contents of P.australis litters under tidal flooding conditions were higher than those under short-term flooding conditions.For S.salsa litters,all heavy metals exhibited an increase in the study,and the contents of As,Cu and Pb under tidal flooding conditions were significantly higher than those under the short-term flooding conditions(P<0.05).Pb and Zn were released during the decomposition for both P.australis and S.salsa litters.The findings of this study contributed to further studies on the influences of the tidal waves on the litter decomposition and metal returns in the Yellow River Delta.
作者
关亚楠
白军红
王伟
王大伟
尹硕
GUAN Ya-nanu;BAI Jun-hong;WANG Wei;WANG Da-wei;YIN Shuo(State Key Laboratory of Water Environment Simulation,School of Environment,Beijing Normal University,Beijing 100875,China;College of Chemistry and Material Science,Heibei Normal University,Shijiazhuang 050020,China)
出处
《自然资源学报》
CSSCI
CSCD
北大核心
2020年第2期472-479,共8页
Journal of Natural Resources
基金
国家重点研发计划项目(2017YFC0505906)
北京师范大学学科交叉建设项目(11500-312231104)
中央高校基本科研业务费专项基金
关键词
凋落物
淹水
芦苇
盐地碱蓬
分解
重金属
litters
flooding conditions
Phragmite australis
Suaeda salsa
decomposition
heavy metals
作者简介
关亚楠(1989-),女,河北石家庄人,博士研究生,研究方向为湿地生物地球化学。E-mail:ynguan14@163.com;通讯作者:白军红(1976-),男,河北无极人,博士,教授,研究方向为湿地生态修复。E-mail:junhongbai@163.com。
