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应用生态学报 ›› 2001, Vol. ›› Issue (4): 522-526.

• 研究论文 • 上一篇    下一篇

三江平原湿地生态系统P、K分布特征及季节动态研究

杨永兴1, 王世岩1, 何太蓉2   

  1. 1. 中国科学院长春地理研究所湿地环境开放实验室, 长春 130021;
    2. 重庆师范学院地理系, 重庆 400047
  • 收稿日期:1999-11-10 修回日期:2000-05-03 出版日期:2001-07-25
  • 通讯作者: 杨永兴,男,1956年生,美国杜克大学湿地中心(WetlandCenter,DukeUniversity)博士后,研究员,博士生导师.
  • 基金资助:
    国家自然科学基金(49771002);中国科学院长春地理研究所所长基金(CCIG96)资助项目

Distribution characteristics and seasonal dynamics of phosphorus and potassium in wetland ecosystem in the Sanjiang Plain

YANG Yongxing1, WANG Shiyan1   

  1. Changchun Institute of Geography, Chinese Academy of Sciences, Changchun 130021
  • Received:1999-11-10 Revised:2000-05-03 Online:2001-07-25

摘要: 对三江平原毛果苔草-狭叶甜茅(Carexlasiocarpa-Glyceriaspiculosa)湿地和小叶章(Deyeuxiaangusti-folia)湿地的植物、土壤和地表积水进行P、K含量测定,运用一元非线性回归分析对P、K元素含量季节动态特征进行了探讨.结果表明,不同种类的湿地植物、同种植物的不同器官其P、K含量存在差异,但总特点是K含量高于P含量,说明湿地植物具有富集K的特性.两类湿地土壤P、K全量、速效量的剖面分布特征也不同.各层土壤全K含量均高于全P含量.植物、土壤和地表积水中P、K含量均有明显的季节动态变化,一元非线性回归模拟均得到较理想的模拟模型,相关系数大多在0.9以上,F检验较显著.

关键词: 湿地生态系统, P、K分布特征, 季节动态, 三江平原

Abstract: From May to October in 1997, the plant,soil and logging water in the wetlands were sampled monthly,and their P and K concentrations were measured.With the method of one-factor non-linear regression analysis,the seasonal dynamics of P and K in two types of wetland i.e.,in Carex lasiocarpa-Glyceria spiculosa wetland and in Deyeuxia angustifolia wetland were studied.The concentrations of P and K varied with different species of wetland plant and different organs of the same plant species.But their common property was that the concentration of K was higher than that of P,which shows that the mire-wetland plants had the property of enriching K element.The concentrations of P and K had an obvious seasonal dynamics in plant,soil and logging water,but the patterns were not the same.Some simulation models were obtained,which could be used to forecast the seasonal dynamics of P and K contents.

Key words: Wetland ecosystem, Distribution characteristics of phosphorus and potassium, Seasonal dynamics, Sanjiang Plain

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