【作者】 李艳丽； 王磊； 张文佺； 张士萍； 王红丽； 付小花； 乐毅全；

【Author】 LI Yanli WANG Lei ZHANG Wenquan ZHANG Shiping WANG Hongli FU Xiaohua LE Yiquan (State Key Laboratory of Pollution Control and Resource Reuse,Tongji University,Shanghai 200092)

【机构】 同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室；

【摘要】 多种技术被用于控制崇明东滩互花米草的蔓延。本文通过分析湿地土壤有机碳含量以及土壤微生物活性等指标的变化研究了各种互花米草控制技术对湿地土壤有机碳保留、汇聚能力的影响,以便为选择合适的互花米草控制技术提供参考。研究结果表明经过刈割/翻耕、刈割/翻耕/水位调节、刈割/生物替代等控制措施后,湿地土壤微生物活性均高于对照,而微生物多样性显著低于对照。虽然修复后土壤的有机碳含量也高于对照,但这并不表明经过工程措施后的土壤有机碳汇聚能力高于对照,刈割/翻耕导致土壤有机碳输入量大量增加可能是主要原因。在不同的控制技术中,刈割/翻耕/水位调节模式由于增加了土壤的滞水时间,其土壤微生物活性相对较低,有机碳含量较高,表明该修复土壤的碳代谢能力相对较弱,因此该修复技术对湿地土壤有机碳汇聚能力的影响相对较少。更多还原

【Abstract】 Various Technologies were employed to control the spread of Spartina alterniflora in Dongtan of Chongming Island.The function of wetland soil organic carbon sequestration and sink after different physical controls on Spartina alterniflora were studied by analyzing the differences of soil organic matter and microbial activities,in order to choose better physical controls on Spartina altemiflora.It was concluded that after physical controls,including cutting/digging tillage,cutting/digging tillage/water level control,cutting/biological substitute,the microbial activities in wetland soil were higher than that without physical controls,which was not consistent with the biodiversity.Although the soil organic carbon content in wetland soil with physical controls was higher than that without it,it didn’t demonstrate that the function of wetland soil organic carbon sequestration and sink after physical controls was higher than before,yet the increase of soil organic carbon after cutting/digging tillage could be the main reason.The technologies of cutting/digging tillage/ water level control increased the stagnant water time, which lead the soil microbial activities lower and soil organic carbon was higher.So it indicated that the function of carbon metabolism was lower and demonstrated the higher soil organic carbon sequestration capability under this control.更多还原