长江流域资源与环境 >> 2010, Vol. 19 >> Issue (06): 619-.

• 鄱阳湖、洞庭湖湿地生态 • 上一篇    下一篇

鄱阳湖典型湿地土壤有机质及氮素空间分布特征

葛刚1,2|徐燕花1|赵磊1|吴志强1,2|吴兰1   

  1. (1.南昌大学生物学基础实验教学中心|江西 南昌 330031;2.南昌大学鄱阳湖湖泊生态与生物资源利用教育部重点实验室,江西 南昌 330047)
  • 出版日期:2010-06-20

SPATIAL DISTRIBUTION CHARACTERISTICS OF SOIL ORGANIC MATTER AND NITROGEN IN THE POYANG LAKE WETLAND

GE Gang1, 2,XU Yanhua1, ZHAO Lei1, WU Zhiqiang1, 2, WU Lan1   

  1. (1. Central Laboratory of Biology, Nanchang University, Nanchang 330031, China|2.Key Laboratory of Poyang Lake Environment and Resource Utilization,Ministry of Education, Nanchng University, Nanchang 330047|China)
  • Online:2010-06-20

摘要:

通过对鄱阳湖三个典型湿地植物群落带土壤有机质和全氮的空间分布特征的研究,结果表明:有机质和全氮在湿地土壤中的垂直分布规律具有一致性,表层含量显著高于下层,40 cm以下土壤养分含量基本稳定。表层土壤有机质和全氮含量不同植物群落间存在差异,有机质变化趋势为:刚毛荸荠群落带<南荻群落带<灰化苔草群落带;氮素含量的变化趋势为:南荻群落带>灰化苔草群落带>刚毛荸荠群落带。土壤碳氮比相对较低(10~23);植物对养分的吸收能力、植被生长特征、湿地生态水文过程等影响着有机质和氮素含量的空间分布。
 

Abstract:

The spatial distribution characteristics of soil organic matter and total nitrogen in the Poyang Lake wetland with typical vegetations were studied. Results showed that the vertical distributions of soil organic matter and nitrogen were similar. The concentrations of soil organic matter and total nitrogen in the surface layer were significantly higher than those in the lower layer, and the content of nutrients in the soil below 40 cm kept stable. The horizontal distributions of soil organic matter and total nitrogen in the surface wetland with different vegetation communities were distinctly variable. For example, the highest concentration of soil organic matter was in the Carex cinerascens community wetland, with the least was in the Eleocharis valleculosa community wetland; and the concentration of total nitrogen in Triarrhera lutarioriparia community wetland was the most, and that in Carex cinerascens community wetland was the least.The ratios of carbon and nitrogen were relatively low (10~23). Our results further indicated that many factors affected the spatial distribution of soil organic matter and total nitrogen in the wetland of Poyang Lake, such as the ability of plant absorbing nutrients, vegetation growth,hydrological processes, etc.

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