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当前位置: 首页 > 文章 > Cl~-和SO_4~(2-)输入对辽河口芦苇湿地土壤有机碳矿化的影响 生态学杂志 2018 (8) 2269-2276
Position: Home > Articles > Effects of Cl-and SO_4~(2-) inputs on soil organic carbon mineralization in Phragmites australis wetland of the Liaohe estuary Chinese Journal of Ecology 2018 (8) 2269-2276

Cl~-和SO_4~(2-)输入对辽河口芦苇湿地土壤有机碳矿化的影响

作  者：
刘凯;杨继松;袁晓敏;沈庄;郑冬梅;郑佳玉
关键词：
盐离子;Cl-;SO42-;有机碳矿化;河口湿地
摘  要：
以辽河口芦苇(Phragmites australis)湿地土壤(0~10、10~20、20~30、30~40 cm)为对象,采用室内密闭培养-气相色谱法,研究了不同浓度氯盐(Cl~-)及硫酸盐(SO_4~(2-))输入对辽河口芦苇湿地土壤有机碳矿化的影响。结果表明,表层土壤(0~10 cm)有机碳矿化速率和累积矿化量显著高于下层土壤(10~40 cm)。在20 d培养期间,土壤有机碳矿化速率随时间整体呈下降趋势。Cl~-处理组,低浓度(75 mmol·L-1)处理促进了土壤有机碳矿化,高浓度(450 mmol·L-1)处理显著抑制了土壤有机碳矿化。SO_4~(2-)处理组,不同浓度SO_4~(2-)输入对各层土壤有机碳矿化速率无显著影响。Cl~-输入较SO_4~(2-)输入对辽河口芦苇湿地土壤有机碳矿化影响更明显。本研究表明,未来盐度的上升可能会加速辽河口湿地土壤碳的损失。
译  名：
Effects of Cl-and SO_4~(2-) inputs on soil organic carbon mineralization in Phragmites australis wetland of the Liaohe estuary
作  者：
LIU Kai;YANG Ji-song;YUAN Xiao-min;SHEN Zhuang;ZHENG Dong-mei;ZHENG Jia-yu;Institute of Coastal Ecology, College of Resources and Environment Engineering,Ludong University;Key Laboratory of Eco-Restoration of Regional Contaminated Environment (Ministry of Education) ,College of Environment,Shenyang University;
单  位：
Ministry of Education
关键词：
salt ion;;Cl-;;SO42-;;organic carbon mineralization;;estuarine wetland
摘  要：
Soil samples(0-10,10-20,20-30,30-40 cm layers) of Phragmites australis wetland in the Liaohe estuary were collected,and the closed incubation-gas chromatography was used to examine the effects of chloride(Cl~-) and sulfate(SO_4~(2-)) concentrations on soil organic carbon mineralization. The results showed that both the mineralization rate and the cumulative mineralization of soil organic carbon in the surface soil(0-10 cm) were significantly higher than those of the subsoil layers(10-40 cm). During the 20-day incubation,mineralization rate showed a decreasing trend with time. In the Cl~-treatment groups,the low concentration of Cl~-(75 mmol·L-1) promoted mineralization,while the high concentration(450 mmol·L-1) significantly inhibited the mineralization. In the SO_4~(2-)treatment,there was no significant effect of ionic concentrations on the mineralization rate for all the soil layers. Our results indicate that Clhas a stronger effect than SO_4~(2-)on organic carbon mineralization for P. australis wetland soil in the Liaohe estuary. The increases of salinity in future may accelerate the loss of soil organic carbon in the wetland of Liaohe estuary.

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