水生态学杂志2026，Vol.47Issue(2)：97-107,11.DOI:10.15928/j.1674-3075.202312110374
不同形态和水平氮添加对三江平原湿地植物群落多样性和生产力的影响
Effects of Nitrogen Form and Concentration on Plant Community Diversity and Productivity in the Wetlands of Sanjiang Plain
摘要
Abstract
Wetland ecosystems are sensitive to global change,and the dramatic increase in atmospheric nitrogen(N)deposition and alterations in nitrogen form pose a serious threat to wetland ecosystems.In this study,we explored the effects of N form and application rate on the structure,diversity and productiv-ity of wetland plant communities in the Sanjiang Plain using one-way ANOVA and Duncan's multiple comparison.We aimed to provide a theoretical basis for understanding the mechanisms of change in wet-land plant community structure and function within the context of global change.The study was carried out on an experimental platform of field N addition in the Sanjiang Plain at the Heilongjiang Academy of Sciences,and three forms of N(ammonium,nitrate and amide)at four levels(0,4,8,and 12 g/m2·a)were set.The addition of ammonium and nitrate nitrogen significantly increased the importance value of the grass functional group(P＜0.05),while the addition of amide nitrogen(urea)significantly increased the importance of weeds.The effects of N application rate on plant community diversity followed a consistent pattern.As the N application rate increased,the Simpson index(species dominance)of the plant commu-nity significantly increased,while the Shannon-wiener(species diversity)and Pielou index(species even-ness)significantly decreased(P＜0.05).However,the interactive effect between nitrogen form and appli-cation rate had no significant impact on species diversity within the plant community.N form,N applica-tion rate,and their interaction significantly affected(P＜0.05)plant community productivity in the wet-lands of the Sanjiang Plain.This was especially true for the application of ammonium and nitrate nitro-gen at a rate of 8 g/m2/a,which significantly increased above ground plant productivity.In conclusion,different functional groups of wetland plants on Sanjiang Plain prefer different forms of nitrogen.The weed functional group prefers amide nitrogen,while the grass functional group prefers ammonium and nitrate nitrogen.The interaction between the form and application rate of N has a significant effect on aboveground productivity of the wetland plant community,whereas species diversity is significantly affected only by the rate of N application.These findings provide a theoretical basis for coping with the dynamic changes of wetland plant communities under various nitrogen deposition scenarios.关键词
氮形态/氮水平/湿地植物/群落多样性/物种多样性/三江平原湿地Key words
nitrogen form/nitrogen application rate/wetland plant/community diversity/species diversity/wetland in the Sanjiang Plain分类
资源环境引用本文复制引用
孙杰,曹宏杰,黄庆阳,杨帆,张荣涛,董海鹏,柴春荣,王梦雨,刘赢男..不同形态和水平氮添加对三江平原湿地植物群落多样性和生产力的影响[J].水生态学杂志,2026,47(2):97-107,11.基金项目
"十四五"国家重点研发计划课题(2022YFF130090503) （2022YFF130090503）
黑龙江省科学院双提雁阵特别计划项目(STYZ2023ZR01) （STYZ2023ZR01）
黑龙江省省属科研院所科研业务费项目(ZNJCA2023ZR01). （ZNJCA2023ZR01）
