潮汐对闽江口感潮湿地孔隙水及土壤中硅、氮浓度的影响

发布时间：2018-05-07 07:46

本文选题：潮汐 + 活性硅酸盐　；参考：《应用生态学报》2017年01期

【摘要】：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)中的大小潮日对芦傂、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NH_4~+N、NO_3~--N含量均表现为小潮月高于大潮月,且小潮日NH_4~+-N含量显著高于大潮日(P0.05).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.
[Abstract]:In this paper, the tidal wetland of eel beach in the mouth of Minjiang River was used as the research object. The active silicate in soil interstitial water of three wetland species, Luzao, Spartina alterniflora, were studied in the spring tide month (October) and the small tide month (April) in 2014-2015. The concentration of inorganic nitrogen, the content of biological silicon and total nitrogen in surface soil were measured and analyzed, and the effects of tidal action on the content of silicon and nitrogen in estuarine wetland soil and interstitial water were discussed. The results showed that the bioactive silicate content in the surface soil was slightly higher than that in the spring tide month, in which the bioactive silicate content in the surface soil was the lowest and the gap water active silicate content was the highest on the spring tide day. The opposite is true of the spring tide. The content of NH _ 4- N in soil interstitial water of wetland in different vegetation zones showed that the content of NH _ 4- ~ -N in the small tide month was higher than that in the spring tide month, and the NH _ 4 ~ -N content in the small tide day was significantly higher than that in the spring tide day (P0.05N). The variation of hydrological conditions, such as tidal flooding time, alternate dry and wet conditions, has an important effect on the contents of silicon and nitrogen in the soil and interstitial water of estuarine wetland, and the vegetation type also has a certain influence on the distribution of silicon and nitrogen in estuarine wetland.
【作者单位】：福建师范大学地理科学学院;福建师范大学亚热带湿地研究中心;湿润亚热带生态地理过程教育部重点实验室;
【基金】：国家自然科学基金项目(41401114) 福建省教育厅项目(JA14082) 福建师范大学校创新团队项目(IRTL1205)资助~~
【分类号】：S151.9

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