摘要
以花塘河湿地为对象,分别于2023年5月(平水期)、9月(丰水期)采集水体、植物及土壤样品,通过测定其碳(C)、氮(N)、磷(P)营养元素质量分数,分析湿地系统不同单元各组分生态化学计量特征及其耦合关系。结果表明:丰水期花塘河湿地对水体中COD、TN、NH_(4)^(+)-N、TP的去除总体较佳,且前端净化效果明显。丰水期植物碳、氮、磷质量分数均值均大于平水期,平水期花塘河湿地植物氮磷比均值大于16,丰水期均值小于14,表明该湿地平水期植物生长发育主要受P元素限制,丰水期主要受N元素限制。植物氮、磷吸收量与植物生物量线性拟合分析结果显示花塘河湿地植物的生物量对氮、磷吸收量影响较大。花塘河湿地土壤碳氮比大于10,其土壤有机质主要以外源为主,且磷元素为限制性养分元素。植物与土壤C、N、P生态化学计量比相关性较弱。
Taking the Huatang River wetland as the research object,water,plant and soil samples were collected in May(level period)and September 2023(high water period),and the ecological stoichiometric characteristics and coupling relationship of each component of different units of the wetland system were analyzed by measuring the nutrient content of C,N and P.The results show that the removal of COD,TN,NH_(4)^(+)-N and TP in the water body is generally better in the Huatang River wetland during the high water period,and the front-end purification effect is obvious.The mean mass fractions of carbon,nitrogen and phosphorus of plants in the high water period are all greater than those in flat water period,and the average nitrogen and phosphorus ratios of plants in Huatang River wetland are greater than 16 in the flat water period and less than 14 in the high water periond,indicating that the plant growth and development in the flat water period are mainly limited by P element and N element in the high water period.The results of linear fitting analysis of plant nitrogen and phosphorus uptake and plant biomass show that plant biomass has a great influence on nitrogen and phosphorus uptake in Huatang River wetland.The soil C/N ratio is greater than 10,and the soil organic matter is mainly exogenous,and phosphorus is the limiting nutrient element.The correlation between plants and soil C,N,and P ecostoichiometric ratios is weak.
作者
郑志侠
刘延年
叶碧碧
袁震
朱晓岗
杨文涛
ZHENG Zhixia;LIU Yannian;YE Bibi;YUAN Zhen;ZHU Xiaogang;YANG Wentao(School of Biofood and Environment,Hefei University,Hefei 230601,China;National Engineering Laboratory of Lake Water Pollution Control and Ecological Restoration Technology,China Environmental Science Research Institute,Beijing 100012,China)
出处
《沈阳大学学报（自然科学版）》
CAS
2024年第6期469-479,共11页
Journal of Shenyang University：Natural Science
基金
巢湖生物资源调查研究项目(2020-340181-77-01-037328)
安徽省高校自然科学研究项目(KJ2020ZD59)。
关键词
花塘河湿地
碳氮磷
生态化学计量
植物
土壤
Huatang River wetland
carbon,nitrogen and phosphorus
ecological stoichiometry
plant
soil
