闽江下游湿地植物硅素空间分布特征及其影响因素  

Spatial Distribution Characteristics of Plant Silicon in Wetlands Downstream of Min River

作　　者：王赛 翟水晶[1,2] 邱思婷 俞新慧 WANG Sai;ZHAI Shuijing;QIU Siting;YU Xinhui(School of Geographical Sciences,Fujian Normal University,Fuzhou 350007,China;Institute of Geography, Fujian Normal University, Fuzhou 350007,China)

机构地区：[1]福建师范大学地理科学学院,福州350007 [2]福建师范大学地理研究所,福州350007

出　　处：《亚热带资源与环境学报》2022年第1期58-63,共6页Journal of Subtropical Resources and Environment

基　　金：国家自然科学基金项目(41401114)。

摘　　要：为研究闽江下游沿岸湿地植物硅素的分布特征及其影响因素,以闽江下游沿线湿地为研究对象,于2019年10月设置6个采样点,对植物生物硅含量及储量分配比、植物根冠比和硅素转移系数进行测定分析。结果表明:(1)闽江下游植物枯体生物硅含量普遍较高(6.88~70.60 mg·g^(-1)),地下根系生物硅含量普遍较低(2.02~16.88 mg·g^(-1))。(2)闽江下游植物生物硅含量与种群密度呈负相关关系,与株高呈正相关关系。(3)闽江下游植物根系生物硅含量与土壤盐度呈负相关关系,与根系生物量也呈负相关关系,这说明近海区植物根系生物硅含量低于远海区主要是因为受到盐分胁迫的限制。结果表明,土壤盐度不同、植物种群密度和株高差异、植物生物量的差异对于闽江下游沿岸湿地植物硅素的分布具有一定的影响,这对研究河流湿地植物对硅素的截留作用具有重要意义。In order to study the distribution characteristics and influencing factors of plant silica along the downstream of Min River,with the wetlands along the downstream of the river as the research object,six sampling points were set up in October 2019 to determine and analyze plant biosilicon content,root crown ratio and silicone transfer coefficient.The results showed that,(1)higher silicon of plants in lower Min River(6.88~70.60 mg·g^(-1))and lower(2.02~16.88 mg·g^(-1)).(2)Plant biosilicon content in the lower Min River is negatively correlated with population density and positively correlated with plant height.(3)The content of plant biosilicon in the lower Min River is negatively related to soil salinity and also with root biomass,which shows that the content of plant biosilicon in the offshore area is lower than in the remote area is mainly due to the restriction of salt stress.The research shows that different soil salinity,plant population density and plant height difference and plant biomass have some influence on the distribution of plant silica along the downstream wetlands of Min River,which is of great significance for the interception of the plants on silicon in river wetland.

关 键 词：硅 植物 分布特征 湿地 闽江下游 

分 类 号：Q948[生物学—植物学]