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- W2984737941 abstract "Taking Shanyuntan wetland in the Minjiang River estuary as test object, the dissolved silicates (DSi) and inorganic nitrogen contents in porewater and the biogenic silica (BSi) and total nitrogen contents in surface soil of the Phragmites australis wetland, Cyperus malaccensis wetland and Spartina alterniflora wetland were measured in October 2014 (spring tide month) and April 2015 (neap tide month), respectively, to illuminate the influence of tide on silicon and nitrogen contents in soil and porewater of estuarine wetland. Results showed that the DSi content in porewater and the BSi content in surface soil in spring tide month were slightly higher than those in neap tide month, with the highest being observed on neap tide day and the lowest occurring on spring tide day. In contrast, the BSi content in surface soil on spring tide day showed an opposite trend with that on neap tide day. The contents of NH4+-N and NO3--N in porewater of different wetland soils in spring tide month were higher than those in neap tide month, while the content of NH4+-N on spring tide day was significantly higher than that on neap tide day (P<0.05). The study found that hydrological conditions such as flooding duration and drying-wetting alternation caused by tide had great influences on silicon and nitrogen contents in porewater and surface soil, and vegetation types also showed great influences on their distributions in intertidal wetland of the Minjiang River estuary.以闽江口鳝鱼滩潮汐湿地为研究对象,于2014—2015年大潮月(10月)和小潮月(4月)中的大小潮日对芦苇、短叶茳芏、互花米草3种湿地土壤间隙水中活性硅酸盐、无机氮浓度和表层土壤生物硅、全氮含量进行测定分析,探讨潮汐作用对河口湿地土壤及间隙水中硅、氮含量的影响.结果表明: 湿地土壤间隙水活性硅酸盐、表层土壤生物硅含量在大潮月均略高于小潮月,其中大潮月小潮日土壤间隙水活性硅酸盐含量最高,表层土壤生物硅含量最低,而大潮月大潮日则与之相反.不同植被带湿地土壤间隙水中NH4+-N、NO3--N含量均表现为小潮月高于大潮月,且小潮日NH4+-N含量显著高于大潮日(P<0.05).潮汐引起的水淹时间、干湿交替等水文条件变化对河口湿地土壤及间隙水中硅、氮元素含量具有重要影响,而植被类型对其分布亦具有一定影响." @default.
- W2984737941 created "2019-11-22" @default.
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- W2984737941 date "2017-01-01" @default.
- W2984737941 modified "2023-09-25" @default.
- W2984737941 title "[Influences of tide on silicon and nitrogen contents in soil and porewater in the Minjiang Ri-ver estuary, Southeast China]." @default.
- W2984737941 doi "https://doi.org/10.13287/j.1001-9332.201701.002" @default.
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