生态学报2017，Vol.37Issue(1)：184-191,8.DOI:10.5846/stxb201607261527
盐度对互花米草枯落物分解释放硅、碳、氮元素的影响
Effect of salinity on silicon, carbon, and nitrogen during decomposition of Spartina alterniflora litter
摘要
Abstract
To investigate the effect of salinity on silicon,carbon,and nitrogen values during decomposition of wetland litter,the changing dynamics of silicon,carbon,and nitrogen in Spartina alterniflora stems and leaves under different salinities (0,5,15,and 30) were analyzed in the laboratory.The results showed that the percentage weight loss and decomposition rate of litter decreased with increasing salinity.The silicon release concentrations of litter increased with higher salinity,and were significantly greater in the high salinity treatment (30) than in the freshwater(0) and low salinity (5) treatments (P＜0.05).In contrast,the biogenic silica (BSi) residual contents demonstrated an opposite trend during the terminal decomposition.The carbon contents released from the stem were not significantly different between the different salinity treatments,but the leaf were lower in the freshwater treatment than in the other treatments (P＜0.05).In the higher salinity treatments,the stem litter had higher NH+4-N release,with NO-3-N contents shown to be the opposite.Salinity impact studies on litter decomposition and element release provides reference information for decomposition responses of tidal wetland litter to saltwater intrusion and is the basis for further research on biogeochemical cycles of biogenic elements in wetlands.关键词
枯落物/硅/盐度/碳/氮Key words
litter/silicon/salinity/carbon/nitrogen引用本文复制引用
侯贯云,翟水晶,高会,乐晓青..盐度对互花米草枯落物分解释放硅、碳、氮元素的影响[J].生态学报,2017,37(1):184-191,8.基金项目
国家自然科学基金资助项目(41401114) （41401114）
福建省基金面上资助项目(2016J01184) （2016J01184）
福建省教育厅资助项目(JA14082) （JA14082）
