Soil C, N and P stoichiometry of Deyeuxia angustifolia and Carex lasiocarpa wetlands in Sanjiang Plain, Northeast China
Soil C, N and P stoichiometry of Deyeuxia angustifolia and Carex lasiocarpa wetlands in Sanjiang Plain, Northeast China
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东北三江平原沙叶草和毛果苔草湿地土壤C、N、P化学计量
DOI：
10.1007/s11368-012-0551-8
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发表时间：
2012-06
影响因子：
3.6
通讯作者：
Xue, Zhenshan
中科院分区：
文献类型：
--
作者：
Zhang, Zhongsheng;Lu, Xianguo;Song, Xiaolin;Guo, Yue;Xue, Zhenshan
目的生态化学计量学理论提高了对生态系统养分循环过程的认识。研究了三江平原湿地土壤碳、氮、磷的生态化学计量特征。材料与方法选取德阔峡湿地（沼泽草甸）和苔草湿地（沼泽）采集0 ~ 30 cm深度的土壤岩心。通过分析土壤有机碳、全氮和全磷，研究湿地土壤C/N （RCN）、C/P （RCP）、N/P （RNP）和C/N/P （RCNP）的分布规律。结果与讨论两个湿地土壤碳、氮、磷化学计量特征存在差异。土壤RCN （0 ~ 30 cm深度）与柽柳湿地相近（分别为12.97和12.80），但RCP和RNP显著高于柽柳湿地。RCN在土壤剖面上变化不大，两个湿地的变化趋势不明显。RCP和RNP随距离地表深度的增加而减小，在每个深度区间，柽柳土壤的RCP和RNP均高于细叶松土壤。土壤表层（0 ~ 10 cm，富有机质“Lo”层）的RCN与全剖面（0 ~ 30 cm，“La”层）的RCN差异不显著，而Lo层和La层之间的RCP和RNP差异均显著。毛苔湿地Lo层RCN、RCP和RNP显著高于La层。湿地La层RCNP分别为65:5:1和163:13:1。结论三江平原湿地土壤RCN相对一致，RCP和RNP反映了磷的局限性。需要进一步的研究来确定这些比例是否适用于其他湿地生态系统。
PurposeThe theory of ecological stoichiometry has improved understanding of nutrient circulation processes in ecosystems. The purpose of this work was to study ecological stoichiometric characteristics of carbon, nitrogen and phosphorus in wetland soils of Sanjiang Plain, northeast China.Materials and methodsA Deyeuxia angustifolia wetland (swamp meadow) and a Carex lasiocarpa wetland (marsh) were chosen for collection of soil cores (0–30 cm depth). Soil organic carbon, total nitrogen and phosphorus were analyzed to study patterns of C/N (RCN), C/P (RCP), N/P (RNP), and C/N/P (RCNP) in wetland soils.Results and discussionSoil carbon, nitrogen and phosphorus stoichiometry differed between the two wetlands. Soil RCN (0–30 cm depth) in the D. angustifolia wetland was close to that in C. lasiocarpa wetland (12.97 and 12.80, respectively), but RCP and RNP in C. lasiocarpa soils were significantly higher than those in D. angustifolia soils. RCN changed little within soil profile, without obvious trends in both wetlands. Both RCP and RNP decreased with depth from the surface, and both RCP and RNP were higher at every depth interval in C. lasiocarpa soils compared to D. angustifolia soils. RCN in surface soil (0–10 cm, organic-rich “Lo” layer) was not significantly different from RCN in the entire profile (0–30 cm, “La layer”) of D. angustifolia wetland, while RCP and RNP were both significantly different between the Lo and La layers. In Carex lasiocarpa wetland, RCN, RCP and RNP in Lo layer were significant higher than those in La layer. RCNP in La layer of D. angustifolia and C. lasiocarpa wetlands were 65:5:1 and 163:13:1, respectively.ConclusionsSoil RCN was relatively consistent, while RCP and RNP reflected P limitation in wetlands of Sanjiang Plain. Further research is needed to determine whether these ratios hold among other wetland ecosystems.
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影响因子：
2.1
作者：
A. C. Redfield
通讯作者：
A. C. Redfield
DOI：
10.2136/sssaj1976.03615995004000060026x
发表时间：
1976-01-01
影响因子：
2.9
作者：
GALLAHER, RN;WELDON, CO;BOSWELL, FC
通讯作者：
BOSWELL, FC
东北三江平原湿地CH4、N2O生态系统-大气交换及生态系统呼吸
影响因子：
11.6
作者：
Song, Changchun;Xu, Xiaofeng;Wang, Yiyong
通讯作者：
Wang, Yiyong
DOI：
10.17521/cjpe.2005.0120
发表时间：
2005
期刊：
--
影响因子：
--
作者：
Zeng De
通讯作者：
Zeng De
影响因子：
64.8
作者：
ELSER, JJ;HASSETT, RP
通讯作者：
HASSETT, RP