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生态学杂志 ›› 2010, Vol. 29 ›› Issue (11): 2117-2121.

• 研究报告 • 上一篇    下一篇

不同覆被条件下双台子河口湿地土壤主要营养元素含量

宋晓林1,2,吕宪国1**,陈志科3   

  1. 1中国科学院湿地生态与环境重点实验室,中国科学院东北地理与农业生态研究所,长春 130012;2中国科学院研究生院,北京 100049;3黑龙江农垦勘测设计研究院, 哈尔滨 150090
  • 出版日期:2010-11-08 发布日期:2010-11-08

Main nutrients contents in wetland soil under different cover stations in Shuangtaizi estuarine.

SONG Xiao-lin1,2, LÜ|Xian-guo1, CHEN Zhi-ke3   

  1. 1Key Laboratory of Wetland Ecology and Environment, Institute of Northeast Geography and Agroecology, Chinese Academy of Science, Changchun 130012, China|2Graduate University of Chinese Academy of Sciences, Beijing 100049, China|3Heilongjiang Agricultural Reclamation Survey, Design and Research, Haerbin 150090, China
  • Online:2010-11-08 Published:2010-11-08

摘要: 选择双台子河口湿地3种样地:地表有植被活体(PA)、地表有植物死体(PD)与光滩(GT),共设置21个样点,测定土壤中全氮(TN)、全磷(TP)和全钾(TK)含量,比较了不同植被覆被条件对湿地土壤中营养元素含量及分布特征的影响。结果表明:GT、PD、PA样地土壤TN平均含量分别为0.79、1.01、1.29 g·kg-1;TP为0.49、0.50、0.52 g·kg-1;TK为22.29、23.01、23.40 g·kg-1。不同地表覆被下土壤TN含量差异显著(P<0.05),TP、TK含量差异不显著(P>0.05;P>0.05),说明植被覆被能够有效增加土壤TN含量,而对TP和TK含量影响不大。垂直方向上TN和TP含量具有相似的特征,表现为PA>PD>GT,TK为PA>GT>PD。由表层至底层,TN含量先降低而后升高,TP含量在0~30 cm深度内变化不大,在30 cm以下土层升高,PA增加幅度最大;TK含量由表层至底层变化较大。在PA-PD-GT的湿地退化过程中,土壤TN、TP和TK分别减少38.6%、6.9%和4.7%。

关键词: 栓皮栎, 年龄结构, 分布格局, 生命表, 存活曲线

Abstract: Aimed to understand the effects of different cover condition on the main nutrients contents in wetland soil, three kinds of wetland plots in Shuangtaizi estuarine, i.e., land with living vegetation (PA), land with dead vegetation (PD), and bare beach (GT), were selected, and a total of 21 soil samples were collected, with their total nitrogen (TN), phosphorus (TP), and potassium (TK) contents determined. In the plots GT, PD, and PA, the soil TN content was averagely 0.79, 1.01, and 1.29 g·kg-1, soil TP content was averagely 0.49, 0.50, and 0.52 g·kg-1, and soil TK content was averagely 22.29, 23.01, and 23.40 g·kg-1, respectively. Soil TN content differed significantly with cover condition (P<0.05), but soil TP and TK contents had no significant differences among the three plots (P>0.05;P>0.05), indicating that vegetation could increase soil TN content effectively, but had little influence on soil TP and TK contents. In vertical direction, soil TN and TP contents showed similar distribution pattern, i.e., PA>PD>GT, while soil TK was in the order of PA>GT>PD. With the increase of soil depth, soil TN content decreased after an initial increase, soil TP content changed little at 0-30 cm but increased below 30 cm, with a significant increase in PA, while soil TK content changed greatly from the surface to deep layer. In the degrading process of PA-PD-GT, soil TN, TP, and TK contents decreased by 38.6%, 6.9%, and 4.7%, respectively.

Key words: Quercus variabilis, Age structures, Distribution pattern, Life tables, Survival curve