河口湿地植物活体-枯落物-土壤的碳氮磷生态化学计量特征
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福建师范大学

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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)


Carbon, nitrogen and phosphorus ecological stoichiometric ratios among live plant-litter-soil systems in estuarine wetland
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Fujian Normal University

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    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。

    Abstract:

    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. brevifolius 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.

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王维奇,徐玲琳,曾从盛,仝川,张林海.河口湿地植物活体-枯落物-土壤的碳氮磷生态化学计量特征.生态学报,2011,31(23):7119~7124

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