摘要
碳(C)、氮(N)、磷(P)生态化学计量比是生态系统过程及其功能的重要特征。以闽江河口的芦苇(Phragmites australis)和短叶茳芏(Cyperus malaccensis var.brevifolius)湿地为对象,开展植物活体-枯落物-土壤系统的C、N、P季节动态研究。结果表明:芦苇和短叶茳芏植物活体、枯落物和土壤年均C、N、P含量为C>N>P,两种湿地系统C、N含量均为植物活体和枯落物高于土壤,但与土壤P含量大小关系因植物构件差异而不同;芦苇和短叶茳芏植物活体、枯落物和土壤的C、N、P生态化学计量比表现为C∶P>C∶N>N∶P;芦苇湿地C∶N为枯落物>植物活体>土壤,短叶茳芏为植物活体>枯落物>土壤,而C∶P和N∶P均为枯落物>植物活体>土壤;C、N、P化学计量比可以反映湿地C、N、P交换过程和植物群落的生态功能。
The ecological stoichiometric ratios of carbon （C）, nitrogen （N） and phosphorus （P） are the properties of ecosystem process and function. The seasonal dynamics of C, N and P in live plant-litter-soil system were measured in Phragmites australis and Cyperus malaccensis var. brevifollus wetlands from Minjiang River estuary. The results showed that seasonal averaged C, N and P concentrations were C〉N〉P in live plant, litter and soil. C and N concentrations were higher in live plant, litter than soil and the order of P concentration was uncertain between various plant organs and soil. Seasonal averaged C, N, P stoichiometric ratios were C：P〉C：N〉N：P in live plant, litter and soil in the two wetlands. C：N in P. australis wetland was in order of litter〉live plant〉soil, while they were in order of live plant〉litter〉soil in C. malaccensis var. brevifolius wetland. C：P and N：P were litter〉live plant〉soil in both wetlands. The C, N, P stoichiometric ratios may reflect the exchange of C, N, P and the ecological function of plant community.
出处
《生态学报》
CAS
CSCD
北大核心
2011年第23期7119-7124,共6页
Acta Ecologica Sinica
基金
国家自然科学基金资助项目(31000209
31000262)
福建省科技计划重点项目(2009R10039-1)
福建省自然科学基金资助项目(2010J01139)
