生态学杂志2018，Vol.37Issue(8)：2269-2276,8.DOI:10.13292/j.1000-4890.201808.021
Cl-和SO42-输入对辽河口芦苇湿地土壤有机碳矿化的影响
Effects of Cl-and SO42- inputs on soil organic carbon mineralization in Phragmites australis wetland of the Liaohe estuary
摘要
Abstract
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 (SO42-) 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 SO42-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 SO42-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.关键词
盐离子/Cl-/SO42-/有机碳矿化/河口湿地Key words
salt ion/Cl-/SO42-/organic carbon mineralization/estuarine wetland引用本文复制引用
刘凯,杨继松,袁晓敏,沈庄,郑冬梅,郑佳玉..Cl-和SO42-输入对辽河口芦苇湿地土壤有机碳矿化的影响[J].生态学杂志,2018,37(8):2269-2276,8.基金项目
国家自然科学基金项目(41571092,31300444,41571085)资助 （41571092,31300444,41571085）
