收稿日期: 2007-11-05
修回日期: 2008-05-09
网络出版日期: 2008-06-10
基金资助
国家自然科学基金项目“滨河湿地生态系统服务功能机制及恢复模式研究”(编号:30570276)资助.
Research on Variation Characteristics of Soil Organic Matter Contents in Different Vegetation Community Types in Mengjin Part of Yellow River Wetland
Received date: 2007-11-05
Revised date: 2008-05-09
Online published: 2008-06-10
通过对黄河湿地孟津段不同湿地植被群落类型土壤进行采样分析,探讨了黄河小浪底水库修建之后调水调沙对下游滨河湿地不同植被群落类型土壤沉积特征的影响,并系统研究了滨河湿地土壤有机质的空间分异特征。研究结果表明:受上游小浪底水库建设的影响,滨河湿地不同植被群落类型土壤沉积层次和沉积厚度变化较大,近岸湿地植被向陆生演替的特征明显,土壤沉积加速、并不断向河道推移;滨河湿地不同植物群落类型、不同土壤层次的土壤有机质含量差异显著;典型湿地特征的植被群落表层土壤有机质含量明显高于其它深部沉积土壤;滨河湿地土壤有机质含量的显著差异性和受外部条件的显著控制作用,充分反映了滨河湿地生态系统的脆弱性。
赵同谦 , 徐华山 , 贺玉晓 , 张华 . 黄河湿地孟津段不同植物群落类型土壤有机质含量变化特征研究[J]. 地球科学进展, 2008 , 23(6) : 638 -643 . DOI: 10.11867/j.issn.1001-8166.2008.06.0638
Through the sample analysis of soils in different wetland vegetation community types in Mengjin part of Yellow River wetland, this article discussed the effects on the soil sedimentary characteristics of different wetland vegetation communities in lower riparian after the construction of Xiaolangdi Reservoir, and studied the spatial variation characteristics of the organic matter in riparian wetland soil. The results showed that: influenced by the construction of upriver Xiaolangdi Reservoir, there is great variation in the soil sediment layer amount and thickness of different community types in riparian wetland. The feature of the vegetation succession from hygrocolous to terrestrial is distinct. The soil sediment velocity increases and the riparian wetland continuously encroaches toward the river. Organic contents vary greatly among different vegetation communities and soil layers; The organic matter content of the upper layer soil in the typical wetland communities is obviously higher than that of the deep sediment soil; The fact that the soil organic matter in riparian wetland varies obviously and is controlled by external conditions fully indicates the fragility of riparian wetland.
Key words: Riparian wetland; Soil sediment; Soil organic matter.
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